СВЕТОВОЙ МОДУЛЬ, СИСТЕМА ОСВЕЩЕНИЯ И СПОСОБ ВСТРАИВАНИЯ ДАННЫХ В ИЗЛУЧЕННЫЙ СВЕТ

Изобретение относится к технике связи и может использоваться в оптических системах связи. Технический результат состоит в обеспечении внедрения данных в излучаемый свет и повышении эффективности передачи данных. Для этого предложен световой модуль, содержащий по меньшей мере два первичных источника света, способных к излучению первичного цветного света. Это позволяет световому модулю излучать свет, имеющий интенсивность (Y) и цветовые координаты (x, y), посредством аддитивного смешения цветов составляющих первичных цветов. Световой модуль также содержит модулятор, способный к модуляции первичных источников света, позволяя внедрять данные в излучаемый свет. Модулятор скомпонован, чтобы модулировать цветовые координаты излучаемого света, для внедрения данных. Это особенно выгодно, поскольку чувствительность человеческого глаза к изменениям в цвете ниже, чем к изменениям в интенсивности. Таким образом, данные внедряют в свет, излучаемый из световых модулей системы освещения.3 н. и 10 з.п.

Устройство оптической беспроводной сети

Полезная модель относится к области устройств, предназначенных для сетей беспроводной связи. Устройство оптической беспроводной сети предназначено для использования в сетях беспроводной связи по видимому свету. Устройство состоит из модема-контроллера, модулятора, светодиода, излучающего красный, зеленый, синий и белый цвет (RGBW светодиода), фотоприемника излучения видимого диапазона, демодулятора и контроллера цифрового протокола управления освещением (контроллера DALI). Предложенная конструкция позволяет обеспечить доступ пользователя к глобальной сети Интернет посредством беспроводной связи по видимому свету через включенный в состав устройства модем-контроллер, поддерживающий передачу данных по протоколу управления передачей и протоколу Интернет (TCP/IP протоколу), а также встраивать устройство в существующую инфраструктуру освещения, использующую протокол DALI.

УСТРОЙСТВО И СПОСОБ ДЛЯ ФОРМИРОВАНИЯ ВИДИМОГО СИГНАЛА В СООТВЕТСТВИИ С ОБЪЕМОМ ПЕРЕДАЧИ ДАННЫХ В СИСТЕМЕ СВЯЗИ ЧЕРЕЗ ВИДИМЫЙ СВЕТ

Изобретение относится к технике оптической связи и может использоваться для формирования видимого сигнала. Технический результат состоит в предоставлении пользователю возможности подтверждения объема передачи данных в Связи через Видимый Свет (VLC). Для этого устройство предварительно получает информацию об объеме данных, которые должны быть переданы или приняты, и получает соотношение объема данных переданного устройству VLC принимающей стороны от передающего устройства VLC или объем данных, переданный от устройства VLC передающей стороны и принятый принимающим устройством VLC к суммарному объему данных. Устройство определяет выходной образец видимого света, соответствующий соотношению данных, и формирует видимый свет определенного выходного образца. 3 н. и 17 з.п. ф-лы, 11 ил.

СПОСОБ ЛАЗЕРНОЙ ТЕЛЕОРИЕНТАЦИИ ОБЪЕКТА И УСТРОЙСТВО ДЛЯ ЕГО РЕАЛИЗАЦИИ

Изобретение относится к области лазерной техники и используется для формирования информационного поля лазерных систем телеориентации и навигации, оптической связи и может быть использовано при управлении, посадке и стыковке летательных аппаратов, проводке судов. Технический результат состоит в осуществлении автоматического управления положением лазерных растров управления объектом. Для этого изменение траектории движения управляемого объекта осуществляют путем угловой коррекции поля управления объектом, которое формируют поочередно двумя прямоугольными лазерными растрами, развернутыми относительно друг друга на 90° и образованными за счет сканирования лазерного пучка в каждом растре одной сплошной строкой, при этом формирование сплошной строки осуществляют с помощью двух скрещенных анизотропных акустооптических ячеек, на которые с блока управления дефлекторами подают высокочастотные сигналы с линейной частотной модуляцией, частотный диапазон которых определяет угловые размеры лазерных растров ...

СПОСОБ ЛАЗЕРНОЙ ТЕЛЕОРИЕНТАЦИИ ОБЪЕКТА И УСТРОЙСТВО ДЛЯ ЕГО РЕАЛИЗАЦИИ

... 1. Способ лазерной телеориентации объекта, заключающийся в том, что изменение траектории движения управляемого объекта осуществляют путем угловой коррекции поля управления объектом, которое формируют поочередно двумя прямоугольными лазерными растрами, развернутыми друг относительно друга на 90° и образованными за счет сканирования лазерного пучка в каждом растре одной сплошной (размытой) строкой, при этом формирование сплошной строки (размытие строки) осуществляют с помощью двух скрещенных анизотропных акустооптических ячеек, на которые с блока управления дефлекторами подают высокочастотные сигналы с линейной частотной модуляцией, частотный диапазон которых определяет угловые размеры лазерных растров, причем управляемый объект получает информацию о своем пространственном положении относительно центров двух прямоугольных лазерных растров с помощью установленного на нем фотоприемного устройства, отличающийся тем, что используют блок коррекции кодов смещения, с помощью которого выполняют вычисление ...

Drahtloser Empfänger.

Modulationsvorrichtung, Lichtausstrahlungsvorrichtung und Lichtausstrahlungssystem

... [Aufgabe] Es wird eine Modulationsvorrichtung bereitgestellt, die für eine Lichtausstrahlungsvorrichtung geeignet ist, welche eine hohe Zweckmäßigkeit aufweist, da sie nicht nur als Element in einem Lichtausstrahlungssystem, sondern auch als eigenständige Vorrichtung, die für sich allein IDs über eine Lichtkommunikation sendet, verwendet werden kann. Lösung: Eine Modulationsvorrichtung 20a umfasst eine Modulatorschaltung 26, die eine Lichtquelle 40 zur Durchführung einer Lichtkommunikation bringt, einen Speicher, der eine interne ID speichert, und eine Steuerschaltung 22a, die bestimmt, ob eine externe ID in die Modulationsvorrichtung 20a eingegeben wurde. Bei einer Bestimmung durch die Steuerschaltung 22a, dass die externe ID in die Modulationsvorrichtung 20a eingegeben wurde, veranlasst die Steuerschaltung 22a, dass die eingegebene externe ID als Modulationssignal in eine Modulatorschaltung 26 eingegeben wird. Bei einer Bestimmung durch die Steuerschaltung 22a, dass die externe ID nicht ...

Optischer Sender-Empfänger zur Datenübermittlung und Steuerungsanwendungen

System und Methode zur zielgerichteten, flexiblen Datenübertragung mittels optischer Datensignale

Ein System und Methode zur zielgerichteten, flexiblen Datenübertragung mittels optischer Datensignale bestehend aus einer Einheit zur Aufnahme elektronischer Daten, deren Umwandlung in optische Datensignale und einer Vorrichtung zur zielgerichteten Abstrahlung der optischen Datensignale, einer weiteren Einheit zur Aufnahme der optischen Datensignale sowie derer Weitergabe und einer finalen Einheit zum Empfang optischer Datensignale sowie deren Abstrahlung ...

AUGENSICHERE OPTISCH-DRAHTLOSE KOMMUNIKATION

Ein Kommunikationsknoten zur optisch-drahtlosen Kommunikation in einem optisch-drahtlosen Kommunikationsnetz weist Folgendes auf: eine Eingangsschnittstelle, die ausgebildet ist, um ein Datensignal zu empfangen, einen optischen Transmitter, der ausgebildet ist, um das Datensignal in ein optisches Signal mit einer optischen Leistung umzusetzen, eine Separationsoptik, die ausgebildet ist, um das optische Signal in eine Mehrzahl von optischen Teilsignalen mit einem zugeordneten Spektralbereich räumlich zu teilen, um die optische Leistung auf die Mehrzahl von optischen Teilsignalen aufzuteilen, wobei die Mehrzahl von Spektralbereichen zumindest teilweise übereinstimmt. Der Kommunikationsknoten ist ausgebildet, um die Mehrzahl von optischen Teilsignalen für die optisch-drahtlose Kommunikation auszusenden.

Multifunktionale Hintergrundbeleuchtungseinheit und Informationsgerät, das diese Hintergrundbeleuchtungseinheit verwendet

Eine multifunktionale Hintergundbeleuchtungseinheit beinhaltet eine Lichtleiterplatte, die eine erste Einfalls-/Austrittsfläche und eine zweite Einfalls-/Austrittsfläche beinhaltet, die in der Lage sind, Licht einzubringen und auszugeben, eine Licht aussendende Vorrichtung, die so angeordnet ist, dass sie der ersten Einfalls-/Austrittsfläche zugewandt ist, und die so konfiguriert ist, dass sie der ersten Einfalls-/Austrittsfläche Licht zuführt, und eine Licht empfangende Vorrichtung, die so angeordnet ist, dass sie der ersten Einfalls-/Austrittsfläche zugewandt ist, und die so konfiguriert ist, dass sie Licht empfängt, das von der ersten Einfalls-/Austrittsfläche abgestrahlt wird, wobei die Lichtleiterplatte so konfiguriert ist, dass von der Licht aussendenden Vorrichtung abgestrahltes Licht in die erste Einfalls-/Austrittsfläche eintritt, durch die Lichtleiterplatte hindurch verläuft, und von der zweiten Einfalls-/Austrittsfläche abgestrahlt wird, und die Lichtleiterplatte so konfiguriert ...

SYSTEM UND VERFAHREN ZUR ÜBERTRAGUNG VON INFORMATIONEN FÜR EIN AMPHIBISCHES FAHRZEUG UND STEUERUNGSSYSTEM FÜR DAS FAHRZEUG

ELEKTRONISCHE SCHALTUNGSANORDNUNG

Sendevorrichtung zur optischen Freiraum-Datenkommunikation basierend auf diskreten Leistungspegeln nebst Verwendung

Datenübertragungssystem (10) zur optischen Freiraum-Datenkommunikation mittels digitaler Signale mit einer Sendevorrichtung (12) sowie einem optischen Empfänger (14) unter Verwendung von mehreren unterschiedlichen Stufen emittierter Strahlungsleistungen, wobei die Sendevorrichtung (12) mehrere an/aus-schaltbare Emittergruppen (38) umfasst, die parallel jeweils zur Emission fester unterschiedlicher Strahlungsleistungen ansteuerbar sind, wobei die gesamte von der Sendevorrichtung (12) emittierte Strahlungsleistung durch die Summe der emittierten Strahlungsleistungen aller Emittergruppen (38) gebildet ist, dadurch gekennzeichnet, dass zur Übertragung eines Bitvektors (b0 ... bn) die dem höchstwertigen Bit (b0) zugeordnete Emittergruppe (38) eine Maximalstrahlungsleistung Pmax emittiert und die den geringerwertigen Bits (b1 ... bn) des Bitvektors zugeordneten Emittergruppen (38) folgende Strahlungsleistungen emittieren: Px = Pmax/2x mit x = 1 ... n.

Drahtloser Kommunikationsempfänger mit einem Konzentrator mit Totalreflexion

Lichtsignalanlage

SENDE- UND EMPFANGSEINHEIT SOWIE VERFAHREN ZU DEREN BETRIEB

Die Erfindung bezieht sich u. a. auf eine Sende- und Empfangseinheit (100), nachfolgend erste Sende- und Empfangseinheit (100) genannt, die einen ersten Sender (110) und einen ersten Empfänger (120) umfasst, und in eine Freistrahlverbindung (300) mit einer zweiten Sende- und Empfangseinheit (200), die einen zweiten Sender (210) und einen zweiten Empfänger (220) umfasst, gebracht werden kann. Erfindungsgemäß ist vorgesehen, dass die erste Sende- und Empfangseinheit (100) eine Balkenanzeige (140) mit einer Vielzahl an individuell aktivierbaren Balkenelementen (B1–B10) aufweist und mit der Balkenanzeige (140) eine Steuereinrichtung (130) in Verbindung steht, die in einem Doppelanzeigemodus betreibbar ist, in dem sie mit den Balkenelementen (B1–B10) dieser Balkenanzeige (140) eine Doppelanzeige zweier Justagezustände gleichzeitig durchführt, wobei in dem Doppelanzeigemodus die Steuereinrichtung (130) mit einem oder mehreren Balkenelementen (B1–B10) der Balkenanzeige (140) die Empfangsleistung ...

TRANSAKTIONSMEDIUM FÜR IrDA-KOMPATIBLE SYSTEME

Kombinierter Diffuser und direktiver Infrarotsenderempfänger

Gerät zur optischen Übertragung im freien Raum

Infrared ray communication apparatus

System for sending and receiving data between master unit and an external device via slave unit

Data are sent and received between a video games machine 2, serving as a master unit of a data processing system 1, and a portable computer 3, serving as a slave unit, removably connected to the master unit. The portable computer is a PDA, and includes a radio communications facility. The video games machine has excellent data processing capability, but it has no radio communications facility. A recording medium such as a CD-ROM, loaded in the video games machine, stores communications control programs including a communication application 50, and a radio communication driver 70 for enabling radio communications between the portable computer and the external device ( 4, Figure 1) which may be a digital camera, or a personal computer, having a radio facility. The communications control programs are supplied from the games machine to the PDA, stored in a non-volatile memory (42, Figure 4) and are executed to enable data processed by the video games machine to be transmitted, via the PDA, ...

Portable radio terminal with infrared communication function and communication method for portable radio terminal

Electronic apparatus having an optical communication function

Portable electronic apparatus having an infrared communication function

A portable electronic apparatus 10 is provided with a plurality of infrared element connectors 103-105 on the surfaces of its housing 101. A detachable infrared emitting/receiving element 106 is electrically connectable to a selected one of the infrared element connectors which is directed towards the opposite apparatus, so as to provide the desired infrared connection. This enables the infrared transmission to be established without changing the orientation of the apparatus.

Optical data communication apparatus for printer

PURPOSE: To provide a printer and a data communication device high in the degree of freedom of the arrangement of a printing data transmission means. CONSTITUTION: The optical communication adaptor 51 of a printer performing printing on the basis of the printing data transmitted from a printing data transmission means by optical communication is directly attached to a printer main body 11 in a detachable manner through a connector and a transmission and reception part 55 receiving printing data is provided to the optical communication adaptor 51 through a shaft 57 in a directionally adjustable manner.

OPTICAL AMPLIFICATION

Display apparatus

A light input/output section for an infrared data communication terminal

Optical wireless rotary joint

An optical wireless rotary joint can include a first optical device and a second optical device. The first optical device can be coupled to a rotatable component for rotating with the rotatable component. The second optical device can be physically separated from the first optical device. The second optical device can be coupled to a stationary component for communicating data with the first optical device using an optical signal. The first optical device or the second optical device can include an optical transmitter for transmitting the optical signal based on the data. The other of the first optical device or the second optical device can include an optical receiver for generating a new signal in response to detecting the optical signal transmitted by the optical transmitter.

TRANSACTION MEDIUM FOR IRDA COMPATIBLE SYSTEMS

PROCEDURE FOR THE EVALUATION OF THE FREE SPACE-OPTICAL PROPAGATION CHARACTERISTICS

SYSTEM AND PROCEDURE FOR THE TRANSMISSION OF INFORMATION FOR AN AMPHIBIOUS VEHICLE AND CONTROL SYSTEM FOR THE VEHICLE

Optical imagins system with optical delay lines

BALLOON NETWORK WITH FREE-SPACE OPTICAL COMMUNICATION BETWEEN SUPER-NODE BALLOONS AND RF COMMUNICATION BETWEEN SUPER-NODE AND SUB-NODE BALLOONS

Exemplary embodiments may involve hierarchical balloon networks that include both optical and radio frequency links between balloons. An exemplary network system may include: (a) a plurality of super-node balloons, where each super-node balloon comprises a free-space optical communication system for data communications with one or more other super-node balloons and (b) a plurality of sub-node balloons, where each of the sub-node balloons comprises a radio-frequency communication system that is operable for data communications. Further, at least one super-node balloon may further include an RF communication system that is operable to transmit data to at least one sub-node balloon, where the RF communication system of the at least one sub-node balloon is further operable to receive the data transmitted by the at least one super-node balloon and to transmit the received data to at least one ground-based station.

Data in motion storage system and method

A data storage system is disclosed that includes a recirculating loop storing data in motion. The data may be carried by a signal via the loop including one or more satellites or other vessels that return, for example by reflection or regeneration, the signals through the loop. The loop may also include a waveguide, for example an optical fiber, or an optical cavity. Signal multiplexing may be used to increase the contained data. The signal may be amplified at each roundtrip and sometimes a portion of the signal may be regenerated.

Method of and apparatus for data communications between portable information terminals

Mobile data terminal with an infrared communication capability

Transaction support for irda-compatible systems

STEERING SWITCH DEVICE

A steering switch device (200) for a vehicle including a vehicle body (1), a steering wheel (100) rotatably attached to the vehicle body, and an electric load mounted on the vehicle body. The steering switch device (200) comprises a control means (3, 23, 24, 25, 26) for providing the electric load with a drive control signal, the control means (3, 23, 24, 25, 26) being secured to the vehicle body (1) and constituted with a light source means (23, 24) for providing an optical signal and a light-receiving means (25, 26), and a switch means (13, 19, 20, 27) for providing the control means (3, 23, 24, 25, 26) with an operation signal, the switch means (13, 19, 20, 27) being arranged in the vicinity of the steering wheel (100) and constituted with a light-conductive path (27) for conducting the optical signal from the light source means (23, 24) to the light-receiving means (25, 26) and an optical switch (19, 20) provided in the light-conductive path (27). The switch means (13, 19, 20, 27) is ...

SYSTEMS AND METHODS FOR DEMODULATION OF FREE SPACE OPTICAL SIGNALS WITHOUT WAVEFRONT CORRECTION

Optical signal receivers and methods are provided that include an optical resonator that allows an optical signal to enter and optical signal energy to accumulate at regions inside the optical resonator. A portion of optical signal energy is emitted from among various regions of the optical resonator, such that a combination of the emitted optical signal energy is disturbed when a phase transition occurs in the received optical signal. A detector aligned with the output detects the combined emitted optical signal energy and is configured to detect the disturbance and determine a characteristic of the phase transition in the received optical signal based upon the disturbance.

PROCESS FOR NON-LOCALLY PRODUCING INFORMATION, FORCES OR ENERGY

The process for nonlocally generating information, forces or energy involves 1) producing space-quantized correlations between quanta with overlapping wave functions, such as between magnetic moments of fermions or between polarizations of two or more photons; 2) collecting and separately storing the correlated quanta in such a way that their magnetic moments or polarizations can be measured in one location and manipulated at another location; 3) manipulating the magnetic moments or polarizations of one quanta at one location, which causes a measurable alteration in the magnetic moments or polarizations of corresponding correlated quanta at one or more other locations, resulting in the generation change in forces and energy at these nonlocal locations; and 4) recognizing (temporal and/or spatial) patterns in theenergy generated or change in particle mechanics at these nonlocal positions which can be interpreted as information. One can envision systems where manipulating one object's dipole ...

STRUCTURE OF A LIGHT INPUT/OUTPUT SECTION OF A PORTABLE INFRARED DATA COMMUNICATION TERMINAL

In a portable data terminal for infrared data communication, a light input/output section has a structure capable of varying the direction in which the data terminal emits and receives infrared rays.

Verfahren zum Einrichten von gerichteten Sende- und Empfangsgeräten.

Signalübertragung mit Lichtblitzen als Übertragungsmittel

Signalübertragungsanlage mit Lichtblitzen als Übertragungsmittel.

Signalanlage für den Betrieb mit sichtbaren und infraroten Strahlen.

OPTICAL SATELLITE TRANSMISSION OF NEWS PLANT.

Procedure for winning error signals for a spatial radiation regulation of an optical superheterodyne receiver.

Method for transferring configuration data to movement alarm unit for controlling light in building space, involves transferring visible light configuration data to picture screen of portable computer by light sensor in movement alarm unit

The method involves arranging a light sensor in a movement alarm unit (3). Visible light configuration data is transferred to a picture screen of a portable computer (4) e.g. smartphone, PDA or tablet computer, by the light sensor in the movement alarm unit. The configuration data as sequence from varying screen contents is transferred to the light sensor in the movement alarm unit. The configuration data is represented as video data on the picture screen of the portable computer and created by a web application.

Method for transferring configuration files to a motion detector.

Die Erfindung betrifft ein Verfahren zum Übertragen von Konfigurationsdaten an einen Bewegungsmelder (3), insbesondere an einen Bewegungsmelder (3) zum Steuern von Licht, wobei der Bewegungsmelder (3) einen Lichtsensor aufweist und wobei auf einem Bildschirm eines tragbaren Computers (4) mittels sichtbaren Lichts Konfigurationsdaten dargestellt und an den Lichtsensor des Bewegungsmelders (3) übertragen werden.

Electronic device of ricetrasmissionericetrasmissione given and associated given method of ricetrasmissionericetrasmissione.

Dispositivo elettronico di ricetrasmissione dati, configurato per permettere l’instaurazione di almeno una comunicazione con almeno un dispositivo elettronico (301; 302) remotamente posizionato rispetto al dispositivo elettronico di ricetrasmissione dati, il detto dispositivo elettronico di ricetrasmissione dati comprende un modulo a radiofrequenza (105) configurato per ricevere e trasmettere dati elettronici su di un canale senza fili secondo almeno un primo standard di comunicazione senza fili predefinito, ed un modulo ricetrasmettitore ottico (108) a sua volta comprendente almeno un trasmettitore ottico (109) ed un ricevitore ottico (110); detto dispositivo elettronico di ricetrasmissione dati essendo configurato per selezionare il detto modulo ricetrasmettitore ottico (108) quale modulo prioritario preferenziale per l’instaurazione di detta comunicazione con detto almeno un dispositivo elettronico (301; 302).

Optical emitter in spettroriflessivaspettroriflessiva modulation.

La presente invenzione consiste in sistemi trasmittenti informazioni ottiche wireless in ambiente illuminato, caratterizzati dal fatto di avere un notevole risparmio di energia rispetto agli attuali offerti dalla tecnica. La trasmissione avviene utilizzando la radiazione elettromagnetica presente nell’ambiente e questa viene modulata con il segnale desiderato. Tale modulazione avviene per alterazione dei parametri dello spettro di riflessione del materiale in seguito alla presenza di campi elettrici o correnti elettriche applicate in funzione del segnale che si intende trasmettere. La presente invenzione è applicabile in diversi settori della tecnica che spaziano dalle comunicazioni per dispositivi mobili alle trasmissioni tra satelliti fino ad arrivare ad elementi indossabili.

Audio transmission wirelesswireless in passing band total and with management of the interferences and cap using this type of transmission.

L’invenzione concerne una cuffia (A) capace di ricevere segnali in modulazione di ampiezza della luce a bande passante totale. I segnali sono generati da un trasmettitore (T1) che modula la tensione de LED. La modulazione avviene direttamente in funzione del segnale audio che si vuole trasmettere.

Reduction of the latency of ricetrasmissionericetrasmissione in bidirectional and dispositive caps for the virtual truth.

La presente invenzione consiste in cuffie bidirezionali e visori per realtà virtuale dotati di sistemi di ricetrasmissione ad altissima velocità. L’alta velocità proviene dall’utilizzo di tecniche di collegamento wireless analogiche o ad impulsi. L’analogico infatti non ha necessità di codificare i dati in trasmissione e decodificarli in ricezione.

Method for automatically controlling received power in FSO system

The invention discloses a method for automatically controlling received power in an FSO system. In a receiving device of a detector of a free-space optics communication system, the received light power is controlled by a method of automatically extending to control a received angular aperture; the control of the received angular aperture is realized by an aperture adjustable diaphragm; a light power sampling system samples the detector regularly, and sample values are input to a microprocessor, compared with a received light power range value stored in the microprocessor, and processed; when the received light power range value is smaller than a fixed value, the aperture of the diaphragm is increased, and when the received light power range value is greater than the fixed value, the aperture of the diaphragm is decreased; and a processing result is used to control a stepping motor to move the position of one end of the diaphragm so as to change the clear aperture of the diaphragm and control ...

Information communication system based on automobile light

Free space optical-communication APT system and method based on compressive sensing receiver

The invention relates to a free space optical-communication APT system based on a compressive sensing receiver. The free space optical-communication APT system based on the compressive sensing receiver comprises an APT system body and the compressive sensing receiver, wherein the APT system body comprises an optical portion and a servo control portion. The optical portion of the APT system body comprises primary mirrors, secondary mirrors, a precise-tracking executing mechanism, a beam splitter, a pulse amplitude modulation, a first convergence light receiving unit, a light spot detecting device, an emitter and a beam expanding collimating lens. The servo control portion of the APT system body comprises a rough-tracking controller, a rough-tracking executing mechanism, a universal angle plate and a precise-tracking loop controller. The compressive sensing receiver comprises an emitter, an imaging lens, a space light modulator module, a convergence light receiving module, point detectors ...

Automatic tracking method and system for atmospheric laser communication

The invention discloses an automatic tracking method and system for atmospheric laser communication, mainly utilizing the principle that deviation caused by external factors can directly lead to the change of optical power to maintain the optimal state of receiving optical power values on both ends by controlling a driving execution component, so that communication quality can be stable and reliable. The realization mode includes the concrete steps: the receiving optical power is detected, local end optical power is transmitted into a remote end by the mode of multiplexing, the local end receiving optical power and the remote end receiving optical power are combined to control the driving execution component according to certain technological processes, the optimal value of the receiving optical power is automatically tracked, and therefore stable and reliable communication can be realized. The invention is applicable to atmospheric laser communication equipment used near earth or on fixed ...

Atmosphere laser communication device

Method for millimeter wave communication

Free space optical communication device based on passive optical network (PON)

The invention discloses a free space optical communication device based on a passive optical network (PON) technology, which aims at the situation that the current free space optical communication system is operated in an SDH system and is not suitable for a PON broadband access network technology. The free space optical communication device comprises a PON interface module, an optical emitting module, an optical emitting antenna, an optical receiving antenna, an optical receiving module, a system control module and an alignment module, wherein both the optical emitting module and the opticalreceiving module adopt infrared lasers with different wavelengths, which are respectively light with the wavelength of 850nm and light with the wavelength of 20nm, and the interference resistance andthe stability of the system are strengthened; the optical emitting module and the optical receiving module perform the transmission and the receiving by four beams of light and drive the lasers in a receiving ...

Device and method for improving wavefront quality of atmosphere laser communication link

Free space optical communication system

IHDAF protocol based on the work of the FSO communication system method

Physical layer safety capacity lifting method for multiplexing OAM beam

Very high speed infrared data broadcast technique

The invention relates to a very-high speed infrared data broadcast technique, which belongs to an application of a wireless information transmission technique. The very-high speed infrared data broadcast technique adopts the technical proposal that: an output end of an address decoding module is connected with a plurality of infrared registers for setting the control data of coding/decoding modules, the control data are wrote into the corresponding infrared registers through the address decoding module; the infrared registers are connected with a direct memory access module, a remote control module and an infrared control module; the remote control module and the infrared control module are connected with the coding/decoding modules; and the direct memory access module is connected with at least two buffer modules, and writes the user data under transmission into the buffer modules connected with the direct memory access module through an external data bus. The coding/decoding moduleswith ...

Electric control device based on optical communication system and related optical communication method

The invention discloses an electric control device based on an optical communication system and a related optical communication method, the electric control device comprises a sending device, the optical communication system and a control device, and the sending device carries out optical communication with the control device through the optical communication system; the optical communication system comprises a first optical module and a second optical module, the first optical module is connected with the sending device, and the second optical module is connected with the control device; the transmitting device is configured to control the first optical module to transmit a first optical signal according to a preset communication protocol based on the control instruction, and the first optical signal carries first instruction information representing the control instruction; the first receiving device is configured to acquire optical information of the first optical signal; and the control ...

COMMUNICATION DEVICE WIRELESS SOUND IN A MEDIUM DENSE FREQUENCY

L'objet de l'invention est un dispositif (10) de communication sonore sans fil, le dispositif (10) de communication sonore comprenant un dispositif d'émission (14) d'au moins une voie d'ordre et au moins un dispositif de réception portable (16) de cette voie d'ordre, le dispositif d'émission (14) et le dispositif de réception portable (16) communiquant de manière non filaire, la communication entre le dispositif d'émission (14) et le dispositif de réception portable (16) étant établie en permanence, et le dispositif de réception portable (16) comprenant un dispositif relais (20) de réception de la voie d'ordre et une oreillette (22) d'écoute de cette voie d'ordre reliée au dispositif relais (20), le dispositif (10) de communication sonore sans fil étant caractérisé en ce que l'oreillette (22) est reliée de manière non filaire au dispositif relais (20).

Improvements to communication systems by light radiation

Signal transmitting and receiving apparatus light

Method and devices for telephony light beam, visible or invisible

Signal device by light waves

Apparatus allowing the visible or invisible transmission signals, figures, letters or images

Orientation system

HIGH SPEED COMMUNICATION SYSTEM IN AN AQUATIC ENVIRONMENT BETWEEN TWO STATIONS.

METHOD FOR TRANSMITTING DATA WITH A VARIABLE DATA RATE VIA AN OPTICAL TRANSMISSION PATH

COMPONENT OF DATA TRANSMISSION OPTICS

Dans un composant en vue de la transmission dirigée, bidirectionnelle de données optiques, dans lequel, dans un boîtier (3, 18) en une ou plusieurs parties, sont disposés en tant que constituants, une puce émettrice (10) en vue de l'émission de rayons infrarouges, une puce détectrice (8) en vue de la réception de rayons infrarouges et un système optique (2) avec un axe optique en vue de la concentration des rayons émis et reçus, il est disposé un réflecteur (13) concentriquement à l'axe optique et autour des constituants (8, 10) et du système optique, afin d'accroître la puissance d'émission et la sensibilité de réception du composant.

Inter-vehicular communication system, vehicle system, vehicle lighting system and vehicle

INFRARED RECEIVER CIRCUIT

... 본 발명은 반송파 신호 및 반송파 신호로 변조된 목표 신호를 포함하는 반송파 변조 적외선 신호를 수신하기 위한 적외선 수신 회로에 관한 것이다. 적외선 수신 회로는, 주파수 설정 단자를 구비하는 대역통과 필터로서, 주파수 설정 단자에 의해 대역통과 필터의 대역의 중심 주파수를 조정할 수 있도록 된, 대역통과 필터와, 목표 신호를 복원하기 위한 복조기와, 복조된 목표 신호를 출력할 수 있는 신호 출력을 포함한다. 적외선 수신 회로는 대역통과 필터의 주파수 설정 단자에 적어도 간접적으로 연결된 신호 입력을 포함하며, 이에 의해 대역통과 필터의 대역의 중심 주파수가 외부 클록 펄스 발생기의 클록 신호에 의해 조정가능하게 되어 있다.

테라헤르츠파를 이용한 인터커넥션 장치 및 방법

... 테라헤르츠파를 이용한 인터커넥션 장치 및 방법이 개시된다. 본 발명에 따른 테라헤르츠파를 이용한 인터커넥션 장치는, 포토믹싱을 이용하여 중심주파수가 제1 중심주파수인 제1 송신 테라헤르츠파를 생성하는 제1 테라헤르츠파 생성부; 중심주파수가 상기 제1 중심주파수와 상이한 제2 중심주파수인 제2 송신 테라헤르츠파를 생성하는 제2 테라헤르츠파 생성부; 상기 제1 송신 테라헤르츠파에 상응하는 제1 수신 테라헤르츠파를 검출하는 제1 테라헤르츠파 검출부; 및 상기 제2 송신 테라헤르츠파에 상응하는 제2 수신 테라헤르츠파를 검출하는 제2 테라헤르츠파 검출부를 포함한다.

FREE-SPACE OPTICAL NETWORK WITH AGILE BEAM-BASED PROTECTION SWITCHING

VALVE MONITORING APPARATUS AND METHOD USING OPTICAL CAMERA COMMUNICATION(OCC) ATTACHED TO VALVE

INFRARED TRANSCEIVER HAVING A CONTROL SIGNAL WHICH CAN EXTEND A TELECOMMUNICATION DISTANCE AND CONTROL METHOD THEREOF

METHOD AND APPARATUS FOR THE OPTICAL TRANSMISSION OF DATA

OPTICAL COMMUNICATION SYSTEMS WITH IMPROVED LINK AVAILABILITY

Method, apparatus and system for suitable message service based on visible light beacon sequencing message headers to form a group of identifiable types

This invention provides a method, apparatus and system for suitable message service based on a visible light beacon. In the method, a system side adds a cyclic redundancy check code into a message header for broadcasting visible light signal information and repeatedly sends a plurality of message headers with inconsistent symbol lengths after modulation is finished, so that the message headers are sequenced to form a group of identifiable types. After receiving, modulating and decoding the visible light signal information, a vehicle-mounted device affirms the visible light signal information respectively through cyclic redundancy check and message header sequence check and inquires corresponding message contents from a beacon message service system according to the beacon identification code in the affirmed visible light signal information.

OPTICAL SPACE COMMUNICATION DEVICE

This optical space communication device is provided with: a reference light source (11) that outputs light corresponding to injection current; a signal splitting unit that splits light into a single instance of local oscillation light and a plurality of instances of signal light; a phase modulator (31) for modulating the phase of the signal light; an optical amplifier (32) that amplifies the signal light after modulation thereof; an optical phased array optical unit (5) that combines the amplified signal light and the local oscillation light and emits the result into space; an optical reception unit (35) that obtains a beat signal from the amplified signal light and the local oscillation light and obtains a baseband signal from the signal light and signal light received from a satellite; a signal processing unit (6) that detects fluctuation in the baseband on the basis of the baseband signal; a loop filter (7) that controls the injection current to the reference light source (11) on the ...

METHOD FOR TRANSMITTING AN FSOC SUPERVISOR CHANNEL

Aspects of the disclosure provide for a method of transmitting state information using free-space optical communication. The method includes using one or more processors (104) of a first communication device (102) to collect state information of the first communication device. A supervisor signal that carries the state information is transmitted from the first communication device along with a beacon beam (20a) in a first solid angle. The supervisor signal is a frequency different from the one or more frequencies of the beacon beam. When a communication link (22a) is established between the first communication device and a second communication device (122), a plurality of data packets is transmitted from the first communication device to the second communication device in a second solid angle smaller than the first solid angle. A subset of the plurality of data packets that do not carry client data carries the state information of the first communication device.

PHASE SENSITIVE BEAM TRACKING

A method includes receiving axis signals (520, 530, 540, 550) from a multi-axis position sensing detector (510), generating a reference signal (660) by summing the axis signals, determining a mirror position of a mirror (880) directing the optical beam based on the beam position error (780, 790) of each axis of the multi-axis position sensing detector, and actuating the mirror to move to the mirror position. Each axis signal is indicative of a beam position (122) of an optical beam incident on the multi-axis position sensing detector, each axis signal corresponding to an axis of the multi-axis position sensing detector. For each axis, the method includes converting a phase of an axis to have a 90 degree phase difference from a signal of the axis, generating an axis-phasor signal (640, 650) by summing the axis signals, and comparing the axis-phasor signal and the reference signal to determine a phase difference.

FSO COMMUNICATION SYSTEM

An FSO communication system. The system comprises a laser used for emitting an optical signal; a light detector used for receiving the optical signal passing through a first light adjustment module; a controller used for collecting and producing on the basis of the optical signal received by the light detector the optical power of the optical signal received by the light detector, and generating and transmitting a corresponding control instruction on the basis of the optical power; the first optical adjustment module used for receiving the control instruction and the optical signal transmitted by the laser, adjusting, on the basis of the control instruction, the optical signal emitted by the laser, thus allowing the optical power of the optical signal received by the light detector to fall within a preset reasonable range, and transmitting the adjusted optical signal to the light detector. The system allows the adjustment of the optical signal emitted by the laser so as to allow the optical ...

A METHOD AND SYSTEM FOR DATA TRANSMISSION

Methods and systems for communicating data through a communication channel are disclosed. A first and a second signal portions are transmitted with the time delay between them corresponding to the value of the data that should be communicated through the communication channel. The communication of the data through the communication channel can be encrypted and concealed by modulating at least one of the first and second signal portions utilizing a certain modulation code, and transmitting the modulated signal portion through the communication channel with intensity in the order of, or below, the level of noise in the communication channel. In the reception path, signals received through the communication channel are processed to detect the reception of the first and second signal portions and determine the value of the communicated data based on the time delay between them. Signal portions modulated by the modulation code, can be detected by convolving the received signals with the modulation ...

Free Space Optical (FSO) System

A detector configuration for use in a free space optical (FSO) node for transmitting and/or receiving optical signals has a plurality of sensors for detecting received optical signals. The plurality of sensors is configured along a common optical path and are used for separate functions. According, the detectors may be optimized for the respective function.

BEAM DOMAIN OPTICAL WIRELESS COMMUNICATION METHOD AND SYSTEM

The invention discloses a beam domain optical wireless communication method and system. A base station is equipped with an array of optical transceiver ports or transmitter/receiver ports and a lens, each optical transceiver port forms a beam with centralized energy through the lens, and the base station generates beams in different directions by using the optical transceiver port array and the lens, thereby realizing multi-beam coverage or large-scale beam coverage in a communication region. The base station transmits/receives signals of multiple or a large number of user terminals by using channel state information of each user terminal, and different optical transceiver ports transmit/receive signals in different directions, thereby realizing simultaneous communication and bidirectional communication between the base station and different user terminals.

Light emitting device and communication system

A communication system includes: at least one light-emitting device for emitting a light; and at least one light-receiving device for receiving the light emitted from the at least one light-emitting device. The light-emitting device further includes: at least one driver unit for generating a modified current based on an externally entered information signal; and at least one light-emitting unit operatively and functionally coupled to the at least one driver unit for receiving the modified current and emitting a modified signal light including any information based on the modified current. The at least one light-emitting unit includes at least one electroluminescence element.

Optical atmospheric link system

An optical atmospheric link device which is adapted to quickly correct the incident position of a light beam with high follow-up accuracy. Incident position detection signals are generated by an optical beam incident position detector in correspondence to the incident position of a first optical beam. The incident position detection signal along with a reference incidence position signal, are utilized to generate incident position correcting signal. The incident position correcting is utilized to move a lens to quickly correct the incident position in a small amplitude mode. Furthermore, a displacement detection signal is generated which corresponds to the displacement of the lens. The displacement detection signal and the incident position correcting signal are utilized to move a pair of mirrors to slowly correct the incident position in a large amplitude mode.

Apparatus and method for supporting mobility of a mobile terminal that performs visible light communication

A method and apparatus for supporting mobility of a mobile terminal in a Visible Light Communication (VLC) system. The method includes searching, by the VLC device, for a first mobile terminal in a plurality of cells; locating the first mobile terminal in a first cell among the plurality of cells; exchanging data with the first mobile using a light source of the first cell; determining whether a response signal corresponding to data reception is received from the first mobile terminal in the first cell; searching for the first mobile terminal in a neighboring cell of the first cell, if the response signal is not received; and determining the neighboring cell as a second cell for visible light activation, if the first mobile terminal is located in the neighboring cell.

Systems and methods for inter-system sharing of satellite communications frequencies within a common footprint

Two satellite communications systems can use the same frequency or frequencies in geographically overlapping footprints, without creating undue interference in a given system that is caused by the same frequency signal(s) that is/are used by the other system. In particular, an aggregate Effective Isotropic Radiated Power (EIRP) of the radioterminals and/or ancillary terrestrial components of a second satellite communications system in the common footprint is sufficiently low, and/or the receive antenna gain of a first satellite communications system is sufficiently low compared to the receive antenna gain of the second satellite communications system, so as to increase an aggregate receiver noise that is seen by the first satellite system receivers by an amount that does not substantially change a Quality of Service (QoS) of the first satellite communications system.

Method and device for optically transmitting data

In a method for optically transmitting data by means of a pulse-width-modulated light source (LED), a pulse duty factor (N) of a pulse width modulation is specified to set the brightness of the light source (LED). A bright time (T) is divided into at least a first and second partial bright time using at least one blanking so that the data (DATA) to be transmitted are encoded by the start and time length of the at least one blanking. The sum of the partial bright times within the pulse width modulation cycle substantially corresponds to the bright time according to the specified pulse duty factor.

Illuminating light communication device

An illuminating light communication device comprises a constant current source, a smoothing capacitor connected to an output of the constant current source, a load circuit comprising a light emitting diode and connected to the output of the constant current source, a load change element added to the load circuit and thereby partially changing load characteristic of the load circuit, and a switch element configured to determine whether or not the load change element is added to the load circuit in accordance with a binary optical communication signal.

High Speed Error Detector for Fading Propagation Channels

A customized bit error rate tester that characterizes data transmission through a free space optical channel that overcomes the limitations of commercial based bit error rate testers by providing visibility into packet based channel capacity by measuring bit-level statistics not dominated by fades. In this manner, fade characteristics can be measured and a relationship between fade time and data packet lengths can be developed. Further, analog outputs provide visual real-time data link statistics.

Receiver chip and method for on-chip multi-node visible light communication

A receiver chip, system and method for on-chip multi-node visible light communication, the receiver chip comprising: an array of receiver cells comprising an array of photodetectors, each receiver cell comprises at least one photodetector and is to receive light through the at least one photodetector, and a logical layer for independently configuring at least one selected receiver cell as a communication receiving channel. The system comprises an array of receiver cells comprising an array of photodetectors, each receiver cell includes at least one photodetector and is to receive light through the at least one photodetector, a logical layer to independently configure at least one selected receiver cell as a communication receiving channel, and a processor to receive data from the logical layer and control the logical layer for configuration of the receiver cells.

TK wireless adapter

An adapter for providing wireless communication between a transducer and a computer. The adapter of the present invention includes a processor and a first connector operable for connecting the adapter to the transducer. The connector is in electrical communication with the processor such that the processor receives at least one measured parameter from the transducer. The present invention also includes at least one radio transmitter in electrical communication with the processor, the processor operable to transfer the measured parameter to the at least one radio transmitter for wirelessly transmitting the measured parameter to the computer. The radio transmitter is able to broadcast in one or more wireless communication protocols. The adapter of the present invention is suitable for operation with any type of transducer that functions as a sensor/detector, an actuator, or the like, and is able to transfer the measured parameter detected by the transducer wirelessly to a computer.

Data transmitting and receiving apparatus and method for visible light communication

An apparatus for transmitting data for visible light communication sets up the pulse width control step of pulse width modulation (PWM) in a unit time interval, modulates each symbol of VLC source data input into a PWM signal in accordance with the pulse width control step, generates a visible light modulation signal by controlling the turn-on time or turn-off time of a plurality of light emitting diodes (LEDs) in response to the PWM signal, and transmits the visible light modulation signal.

Light-based, transcutaneous video signal transmission

A surgical device is disclosed which includes an optical source for wirelessly transmitting a light based signal transcutaneously and a receiver for receiving the light based signals. The wireless coupling of signals between the optical source and the receiver wirelessly transmits video images from an internal site in a patient to a video monitor or other viewer outside the patient, and may wirelessly transmit control signals from a controller outside of the patient to an instrument inside the patient during a therapeutic or diagnostic surgical procedure.

Apparatus and method for performing communication using light wavelengths in a visible light communication system

A transmitting apparatus includes a controller to classify data to be transmitted and to select a corresponding wavelength, a signal modulator to encode the data into an electrical signal, and a light emitting unit to emit a visual light at the selected wavelength based on the electrical signal. A receiving apparatus includes a controller to classify data to be received, and to select a corresponding wavelength, an optical filter to receive and filter a visible light, a visible light receiver to transform the filtered visible light into an electrical signal, and a signal demodulator to demodulate the electrical signal into digital data. A transmission method includes classifying transmission data, selecting corresponding wavelength, and encoding the data into an electrical signal to transmit. A receiving method includes filtering a received light, transforming the filtered light into an electrical signal, and demodulating the transformed electrical signal into digital data.

Method and apparatus for clearing an optical channel

A method and apparatus for clearing an optical channel for transmitting data through free space between a first and second location includes a light beam, wherein the light beam has a spatially and/or time-dependent modulated intensity profile, and is substantially collimated so that the intensity profile is conserved over a specified distance of operation. The light beam includes a cross-sectional profile having regions of low and high intensity, portions of which are provided for the transmission of an optical data signal. A light source wavelength and intensity are selected for types of obscurant particles having optical properties whereby the radiation pressure acts on the particles, and the particles may then be either attracted into or repelled from portions of the spatially modulated optical beam, leaving certain portions of the optical channel beam absent of obscurant particles, thereby enabling transmission of optical data through the cleared optical channel with low attenuation.

Communication system

A communications system comprising at least one light source, a side-emitting fiber light rope into which light emitted from the light source is coupled, and means for sending at least one data carrying optical signal along the light rope.

Circuit with passive components for high-speed drive of an optoelectronic device

A circuit for the ultra-quick control of an optoelectronic device, includes a generator of voltage pulses having a pulse duration of less than 400 ps, and a circuit ( 17 ) for shaping control pulses including: an output suitable for being connected in series to a line terminal ( 13 ) of the optoelectronic device, and an input connected to the voltage-pulse generator and receiving the voltage pulses formed by the latter, between a terminal of the input and a terminal of the output, mounted in parallel in relation to one another: a first branch ( 20 ) made up of a passive rectifier circuit ( 22 a, 22 b ) having non-zero threshold voltage and, in series in the first branch in forward direction relative to the line terminal ( 13 ) of the optoelectronic device, a second capacitive branch ( 21 ).

Apparatus and method for transmitting data by using visible light

Disclosed is an apparatus and a method for transmitting data by using visible light. The transmission apparatus includes: a Serial-to-Parallel (S/P) converter for performing a Serial-to-Parallel conversion on transmission data, and generating multiple parallel data; a modulation means for modulating the multiple parallel data generated by the S/P converter, and generating multiple modulation signals; an Inverse Fast Fourier Transform (IFFT) means for performing an IFFT on the multiple modulation signals so that the multiple modulation signals are orthogonal to one another, and generating an IFFT signal; and a light-emitting means for causing a light source to emit light based on the IFFT signal generated by the IFFT means.

Hearing aid system using wireless optical communications

Provided is a hearing aid system using a wireless optical communications method. The hearing aid system includes: a voice transmitter that converts addresser's voice into an optical signal to then transmit the converted optical signal; and a hearing aid that restores the optical signal received from the voice transmitter into the addresser's voice to then output the restored addresser's voice. Accordingly, the addresser's voice can directly be transmitted to the hard-of-hearing via wireless optical communications, to thereby prevent a voice discriminating power from lowering even in the case that ambient noise of an addresser as well as a listener is big.

Relay Device and Speaker Apparatus

A relay device includes: a housing including: a first surface; and a second surface which is different from the first surface; a light signal receiving element operable to receive a light signal from outside, the light signal receiving element provided at the first surface of the housing; a light emission element operable to emit light responsive to the light signal received by the light signal receiving element; and a longitudinally elongated light guide member provided at the second surface of the housing, the light guide member to which the light emitted from the light emission element is incident, the light guide member including an emission part which causes the incident light to be emitted to outside from a lateral surface of the light guide member, the lateral surface which extends along a longitudinal direction of the light guide member.

Method and arrangement for stabilizing a color coding method for optical transmission of data

A method for optically transmitting data between a transmitter and a receiver is provided, wherein a color coding method based on a plurality of elementary colors is provided for encoding and transmitting the data, wherein each elementary color is transmitted by a transmitter-side optical radiation source and is received on the receiver side by an optical radiation receiver. The method includes transmitting a training request message comprising calibration information formed on the transmitter side; forming a channel properties matrix by the receiver from the calibration information and storing the channel properties matrix in the receiver; calculating at least one compensation information on the basis of a reference channel properties matrix stored in the receiver and the reference channel properties matrix; and transmitting the compensation information from the receiver to the transmitter.

Active Tracking for Free-Space Optical Communication Systems

Systems and methods enabling nodes of a free-space optical communication system to maintain pointing alignment of their transmitted optical beams. A first node scans its optical antenna through a path centered on a target direction. The second node captures signal strength measurements during the scan, and sends those measurements to the first node. The first node separately measures signal strength of the optical signal being received from the second node. The two sources of information (locally measured and remotely measured) are used to compute angular errors. The first node uses the angular errors to adjust the target direction of its optical antenna. The second node may employ the same method (with roles reversed) to adjust its target direction. By cycling back and forth between to the two nodes, the target directions of the two nodes maintain alignment in spite of movements of the structures on which they are mounted.

Methods of communication utilizing an led lamp

Operation of an LED as a light source may be temporarily interrupted to facilitate receipt and/or transmission of optical communications, as well as control of the operation of the LED based thereon.

Fiber-Optic Automatic Gain Control Systems and Methods

Methods and systems to control a gain applied to a free-space optical (FSO) signal to reduce time-varying intensity fluctuations. An optical pre-amplifier may provide a first, relatively moderate gain with low noise factor (NF). A second optical amplifier may provide a second gain. Amplification may include doped fiber amplification (DFA), such as erbium-doped fiber amplification (EDFA) and/or Raman amplification. A variable optical attenuator (VOA) may be controllable with a relatively fast response time to reduce the time-varying intensity fluctuations. The VOA may effectively control an overall system gain. The gain of the first and/or second optical amplifier may also be controllable to reduce the time-varying intensity fluctuations. Optical intensities may be detected at one or more locations to support one or more feed-forward and/or feedback control loops. A clamp may be applied when an optical power reaches a threshold.

Illumination light communication device, and illumination apparatus and system including same

An illumination light communication device includes a light source unit including light emitting elements; a power supply unit controlling a load current flowing through the light source unit to be maintained at a constant; a switch element connected in series to the light source unit; and a control unit configured to control on/off of the switch element to modulate a light intensity of illumination light from the light source unit such that a binary communication signal is superimposed on the illumination light. The control unit has a switching circuit to open/close a path between the light source unit and the power supply unit, controls on/off of the switching circuit based on a dimming signal to perform a dimming control on the light source unit by a PWM control, and allows the communication signal to be superimposed on the illumination light in synchronization with an ON time of the switching circuit.

Methods and Apparatus for Interoperable Satellite Radio Receivers

Methods and apparatus are presented to allow one receiver architecture to be used for the reception of two different SDARS signals. Common receiver functions can be utilized to process each signal, thereby obviating the need to duplicate hardware elements. For example, it can be assumed that both signals will not be received at the same time, thus allowing for considerable hardware reuse and lowering the cost of an interoperable receiver.

Data transmission and reception method and apparatus robust against phase noise for high efficiency satellite transmission

A data transmission and reception apparatus is used for a high efficiency satellite transmission. The apparatus includes an initial phase calculation unit to calculate initial phase information using a preamble and a postamble of a data packet applied thereto, a symbol transition calculation unit to perform forward and backward metric operations using the initial phase information calculated by the initial phase calculation unit and a pilot symbol in the data packet to calculate a symbol transition of the data packet, and a phase error estimation unit to calculating a phase error using the pilot symbol in a spot where the pilot symbol is positioned, the calculated phase error being provided to the symbol transition calculation unit.

ACCESS NODE/GATEWAY TO ACCESS NODE/GATEWAY LAYER-2 CONNECTIVITY (END-TO-END)

Systems, methods, and apparatus for providing end-to-end L2 connectivity, are described. The system includes satellites configured to transmit data packets. The system further includes a first non-autonomous gateway in communication with the satellites. The first non-autonomous gateway is configured to receive the data packets from the satellites at L1, generate virtual tagging tuples within L2 packet headers of the data packets, and transmit the data packets each including a virtual tagging tuple. The system further includes a L2 switch in communication with the first non-autonomous gateway. The L2 switch is configured to receive the virtually tagged data packets and transmit the virtually tagged data packets. Further, the system includes a second non-autonomous gateway in communication with the L2 switch. The second non-autonomous gateway configured to receive the virtually tagged data packets and transmit the virtually tagged data packets to an entity based on the virtual tagging tuple associated with each of the virtually tagged packets. 120-. (canceled)21. A system for providing end-to-end layer-2 connectivity throughout a non-routed ground segment network connected to one or more satellites , the system comprising: a satellite modem termination system (SMTS) that demodulates the signals relayed from the bent pipe satellite and generates from the demodulated signals, a plurality of data packets having packet headers for layer-2 of the OSI-model (L2); and', 'a switch coupled with the SMTS that receives the plurality of data packets from the SMTS and adds virtual tagging tuples to the packet headers for each data packet of a subset of the plurality of data packets;, 'a first non-autonomous gateway configured for processing primarily below layer-3 of the OSI-model (L3), the first non-autonomous gateway in communication with a bent pipe satellite that receives signals from one or more user terminals and relays the signals to the first non-autonomous gateway at ...

FORWARD AND REVERSE CALIBRATION FOR GROUND-BASED BEAMFORMING

Methods and systems for calibrating the return and forward links of a satellite communication system are provided according to embodiments of the invention. The phase and/or amplitude variations caused by the return and forward links are calculated and/or estimated to aid in beamforming, such as ground-based beamforming. Calibration earth stations, distributed within one or more beam patterns, may be used to transmit calibration codes to the gateway to calibrate the return link. Return links variations may be estimated using a weighted minimum mean square algorithm at the gateway. Forward links may be calibrated with calibration codes transmitted from the gateway through a hybrid matrix to at least one calibration station. Forward calibration links may also calibrate for temperature-dependent signal variations such as diplexer variations at the satellite. 1. A method for ground-based calibration of a satellite forward link , the method comprising:transmitting a plurality of orthogonal codes from a gateway to a satellite, wherein each of the plurality of orthogonal codes are received at a unique feed at the satellite;multiplexing the plurality of orthogonal codes into a linear combination of the plurality of orthogonal codes at the satellite;transmitting the linear combination of the plurality of orthogonal codes to a plurality of calibration earth stations over a plurality of feeds;receiving the linear combination of the plurality of orthogonal codes at at least one calibration earth station; anddemultiplexing the linear combination of the plurality of orthogonal codes received at the at least one calibration earth station; anddetermining either or both of phase or amplitude shifts from the plurality of orthogonal codes.2. The method according to wherein:the plurality of orthogonal codes include at least one PN code;transmitting the linear combination of the plurality of orthogonal codes to a plurality of calibration earth stations over a plurality of feeds includes ...

World-wide, wide-band, low-latency, mobile internet and system therefor

A communication system for providing world-wide, mobile Internet communication to a plurality of users and a method therefore. The system includes ground-based, multi-channel, radio frequency transmitting and receiving broadcasting grids that are capable of providing content to multiple users via cell towers and low-altitude, optical transmitting and receiving satellites that are in optical communication with the ground-based, multi-channel, RF transmitting and receiving broadcasting grids. The method includes transmitting optical and/or RF signals between at least one of the ground-based, multi-channel, RF transmitting and receiving broadcasting grids and at least one of the low-altitude, optical transmitting and receiving satellites. 1. A communication system for providing world-wide , mobile Internet communication to a plurality of users , the system comprising:a plurality of ground-based, multi-channel, radio frequency or optical transmitting and receiving broadcasting grids that are capable of providing multichannel radio frequency transmitting to the plurality of users via at least one cell tower; anda plurality of low-altitude, optical transmitting and receiving satellites that are in optical communication with the plurality of ground-based, multi-channel, radio frequency or optical transmitting and receiving broadcasting grids.2. The communication system of wherein said satellites are spinning stabilized.3. The communication system of wherein said satellites are approximately 600 miles above the earth.4. The communication system of wherein said satellites transit an earth based grid in approximately 8 minutes.5. The communication system of wherein each satellite communicates with another satellite to provide communication between users over significant earth distances.6. The communication system of wherein communication between users is achieved using plural grids and plural satellites.7. A method of providing world-wide claim 1 , mobile Internet ...

DIRECTIONAL REMOTE CONTROL

A remote control unit generates a first beam which a user points at one of a plurality of information appliances to select that appliance. After selecting the desired appliance, the user then actuates a button on a control keypad on the remote control unit to cause the unit to generate a second, modulated beam. The remote control unit modulates the second beam in accordance with a desired functionality of the information appliance to control the appliance accordingly. 1. A method for controlling one of a plurality of devices , comprising the steps of:receiving at one or more devices a beam of electromagnetic radiation;generating by the one or more devices an acknowledgement signal upon receipt of the beam of electromagnetic radiation directed thereat;designating a device generating an acknowledgement signal; andenabling the designated device to receive at least one control signal to control the device.2. The method according to wherein the user designates the device generating the acknowledgement signal.3. The method according to wherein a controller designates the device generating the acknowledgement signal.4. The method according to wherein the acknowledgement signal comprises an electrical signal.5. The method according to wherein the acknowledgement signal comprises an optical signal.6. The method according to wherein the designating step includes the step of choosing among multiple devices in accordance which device has highest priority.7. The method according to wherein the designating step includes the step of choosing among multiple devices in accordance which device was designated previously.8. The method according to de-designating the device after the device completes receiving a control signal.9. A method for controlling one of a plurality of devices claim 1 , comprising the steps of:directing a first beam at the device to initiate device selection;directing a second beam, broader than the first beam, at the device; andmodulating the second beam in ...

APPARATUS AND METHODS FOR POWER CONTROL IN SATELLITE COMMUNICATIONS SYSTEMS WITH SATELLITE-LINKED TERRESTRIAL STATIONS

A signal power control loop is provided for a link between a terrestrial station and a terminal when the terminal and a satellite are linked via the terrestrial station. The signal power control loop may control transmitted signal power of the terminal and/or the terrestrial station. In some embodiments, the signal power control loop controls transmitted signal power of the terminal and/or the terrestrial station independent of signal power control for a link between the terrestrial station and the satellite. 1. A wireless communications system comprising:a base station that is configured to communicate directly with a satellite, wherein the satellite is configured to communicate with terminals directly and to communicate with terminals indirectly via the base station;a first signal power controller that operates a first power control loop that controls transmitted signal power through a first communication link between the base station and a terminal; anda second signal power controller that operates a second signal power control loop that controls transmitted signal power through a combination of the first communication link and a second communication link between the base station and the satellite concurrent with operation of the first signal power control loop,a first demodulation and regeneration unit configured to demodulate a signal received from the satellite and to regenerate the demodulated signal to produce a first regenerated signal;a first modulator configured to modulate the first regenerated signal;a first power amplifier configured to amplify the modulated first regenerated signal for transmission to the terminal;a second demodulation and regeneration unit configured to demodulate a received signal from the terminal and to regenerate the demodulated signal to produce a second regenerated signal;a second modulator configured to modulate the second regenerated signal; anda second power amplifier configured to amplify the modulated second regenerated ...

Apparatus and method for providing dynamic fiducial markers for devices

An apparatus, method, and computer program product are described below that can provide and/or detect dynamic fiducial markers presented on a display of an apparatus. An apparatus providing the fiducial marker may initially provide for the presentation of the fiducial marker on a display, where the fiducial marker represents one or more properties of the apparatus, such as connectivity information for the apparatus. The apparatus may modify the presentation of the fiducial marker based on a change in one or more properties of the apparatus. An apparatus configured to detect dynamic fiducial markers provided on other device displays may also be configured to provide for the presentation of its own fiducial markers, and vice versa. Thus, in some cases, apparatuses may function as both a tangible user interface display and a tangible object (e.g., in a bi-directional communication scenario).

DEVICE FOR TRANSMITTING DATA BETWEEN TWO RAILWAY VEHICLES USING OPTICAL RADIO RELAY

The invention relates to a device () for transmitting data between two rail vehicles (). At each rail vehicle () one data transmission unit ( to ) is arranged, wherein between the data transmission units ( to ) a data transmission link for transmitting data is formed. Data transmission via this data transmission link is carried out by means of an optical radio relay system. 1. A device for transmitting data between two rail vehicles , comprising:a first data transmission unit arranged at the first rail vehicle, anda second data transmission unit arranged at the second rail vehicle,wherein between the first data transmission unit and the second data transmission unit a data transmission link for transmitting data between the first rail vehicle and the second rail vehicle is formed,wherein the data transmission via the data transmission link is carried out by means of an optical radio relay system.2. The device according to claim 1 , wherein the first data transmission unit and/or the second data transmission unit each comprise a transmitter and at least two receivers.3. The device according to claim 1 , wherein the first data transmission unit and/or the second data transmission unit each comprise a receiver and at least two transmitters.4. The device according to claim 1 , wherein the first data transmission unit and/or the second data transmission unit each comprise at least two transmitters and at least two receivers.5. The device according to claim 1 , wherein the first data transmission unit and/or the second data transmission unit each comprise at least one transceiver.6. The device according to claim 1 , wherein the first data transmission unit and/or the second data transmission unit each comprise four claim 1 , preferably eight claim 1 , transmitters that are rectangularly arranged claim 1 , and in that one receiver is arranged in the center of the rectangle.7. The device according to claim 1 , wherein the first data transmission unit and/or the second data ...

OPTICALLY-CONNECTED SYSTEM FOR EXCHANGING DATA AMONG INDUSTRIAL AUTOMATION DEVICES

An optically-connected system is disclosed for exchanging data among industrial automation devices, that is composed of a plurality of connection elements, where each element comprises at least two pairs of optical transmitters and receivers on the main side, and one optical receiver on the opposing main side, that are opposite with respect to another pair of transmitters and receivers in a following element; and where each one of the transmitters and receivers is adapted to communicate with industrial automation devices to cooperate for exchanging data between elements, sending one interrogation signal requesting an identity of the receiver and the receiver is adapted to send to each corresponding response signal containing characteristics of the receiver. 1. An optically-connected system for exchanging data among industrial automation devices comprising: 'where each connection element has a main side and an opposing main side, and, perpendicular to the main sides, a minor side and an opposing minor side;', 'a) a plurality of connection elements;'} 'where each pair of the optical transmitters and receivers is further placed on the main side of the connection elements in an opposite way with respect to another pair of the optical transmitters and receivers in a following connection element, in such a way as to place on each main side of the connection elements one transmitter followed by one receiver eventually followed by one transmitter;', 'b) at least two pairs of optical transmitters and receivers affixed to each one of the connection elements,'} where each one of the transmitters and receivers is adapted to communicate with one or more industrial automation devices,', 'where each one of the transmitters and receivers is adapted to cooperate for exchanging data with a respective receiver and transmitter of another adjacent to the connection elements,', 'where each one of the transmitters is adapted to send to each corresponding one of the receivers one ...

Method and System for Color-Shift Keying Using Algorithms

A system and method for optimizing signal recognition in a light communication system by approximately maximizing the minimum distance between received constellation points; the method comprising identifying the constellation region containing points for transmitting symbols, identifying channel impairments, transforming the constellation region according to the channel impairments into a constellation region of potential received symbols, using signal processing circuitry to apply an algorithm that operates to maximize the minimum distance between constellation points to obtain a symbol constellation in the receiver constellation region, and inverting the transformation to obtain the designed transmitted-symbol constellation. The system comprises signal processing circuitry for performing a preferred methodology.

OPTICAL DOWNLINK SYSTEM

Optical downlink system () and method of optical data transmission between a remote terminal () having a number of n optical communication terminals (OT-OTn), and a ground terminal () comprising a cluster of n optical ground stations (OGS-OGSn) connected by n optical downlink channels (DL-DLn) respectively n optical uplink channels (UC-UCn) characterised by a spatial separation of the optical downlink channels (DL-DLn) and a temporal separation of the optical uplink channels (UC-UCn). 110. Optical downlink system () comprising:{'b': 20', '1, 'a remote terminal () comprising a number of n optical communication terminals (OT-OTn), where n is greater than or equal to two;'}{'b': 30', '1, 'a ground terminal () comprising a cluster of n optical ground stations (OGS-OGSn);'}{'b': 1', '1', '1, 'each optical communication terminal (OT-OTn) being connected with a corresponding optical ground station (OGS-OGSn) with one of n optical downlink channels (DL-DLn); and'}{'b': 1', '1', '1, 'each optical ground station (OGS-OGSn) being connected with a corresponding optical communication terminal (OT-OTn) with one of n optical uplink channels (UC-UCn);'}{'b': 1', '1, 'wherein the optical downlink channels (DL-DLn) are spatially separated from each other by means of the optical ground stations (OGS-OGSn) being located a certain distance apart from each other; and'}{'b': 30', '1', '1', '1, 'wherein the ground terminal () is configured such as to synchronise the n optical ground stations (OGS-OGSn) such that a precise temporal separation is ensured between the n optical uplink channels (UC-UCn) by a time division multiple access scheme thereby avoiding overlap between the optical uplink channels (UC-UCn).'}2103011111. Optical downlink system () according to claim 1 , characterised in that the ground terminal () comprises a sync unit claim 1 , preferably as part of one of the n optical ground stations (OGS-OGSn) being a master ground station claim 1 , the sync unit being configured to ...

METHOD FOR OPTICAL DATA TRANSMISSION FROM LOW EARTH ORBIT TO EARTH AND CORRESPONDING COMMUNICATION SYSTEM

Optical communications system () and method for transmission of payload data (PD) from a low earth orbit satellite () to an optical ground terminal (), the low earth orbit satellite () being connectable with the optical ground terminal () via an optical downlink channel (DL), and the optical ground terminal () being connectable with the low earth orbit satellite () via an uplink channel (UC); wherein said uplink channel (UC) is an acquisition and tracking beacon channel by means of a ground beacon (GB) controlled by a point-acquisition-track subsystem (PAT), the ground beacon (GB) comprising a wide angle beam (W) for acquisition and a guidance beam (G) for tracking; and wherein the ground beacon (GB) for the uplink channel (UC) is a pulse position modulated PPM channel. 210202030. Optical communications system () according to claim 1 , characterized in that the low earth orbit satellite () further comprises a buffer (B) for temporarily storing said payload data (PD) until a line-of-sight between the low earth orbit satellite () and the optical ground terminal () becomes available claim 1 , thereby making the payload data (PD) available for fast downlink transmission via said optical downlink channel (DL).31030. Optical communications system () according to characterized in that said satellite transceiver (STR) is configured to scan and acquire said wide angle beam (W) claim 1 , and once acquired claim 1 , track the uplink channel (UC) of the optical ground terminal () with the aid of said guidance beam.410. Optical communications system () according to claim 1 , characterized in that the communication subsystem (CS) is configured to convert said payload data (PD) into a modulated electrical signal claim 1 , preferably into an on-off keying modulated signal claim 1 , for transmitting in data frames by the satellite transceiver (STR) to the ground transceiver (GTR) via the optical downlink channel (DL).510. Optical communications system () according to claim 1 , ...

Wireless communication network system and optical-electrical conversion module

A wireless communication network system includes a signal source terminal, a user terminal, an electrical-optical conversion module, and an optical-electrical conversion module. The electrical-optical conversion module electrically connects with the signal source terminal, for receiving electrical signals sent by the signal source terminal and converting the electrical signals into optical signals. The optical-electrical conversion module electrically connects with the user terminal, for receiving the optical signals and converting the optical signals into electrical signals. The signal source terminal, the user terminal, the electrical-optical conversion module and the optical-electrical conversion module cooperatively build, define, or form a wireless optical communication network.

SYSTEM FOR PROVIDING WDM-BASED WIRELESS OPTICAL TRANSPORT NETWORK AND METHOD FOR TRANSMITTING WIRELESS OPTICAL SIGNAL USING THE SAME

Disclosed are a system for providing a WDM-based wireless optical transport network and a method for transmitting a wireless optical signal using the same. The system for providing a WDM-based wireless optical transport network, includes: a central office terminal (COT) for bilaterally transmitting wireless optical signals of different unique wavelengths; and a plurality of remote terminals (RTs) connected to the COT in a ring, for dropping a wireless optical signal having a corresponding unique wavelength from the wireless optical signals transmitted from the COT, for adding a corresponding optical transmission signal to wireless optical signals of the remaining unique wavelengths except for the corresponding unique wavelength of the dropped wireless optical signal, and for bilaterally transporting the wireless optical signals to which the corresponding optical transmission signal is added. 1. A system for providing a wavelength division multiplexing (WDM)-based wireless optical transport network , the system comprising:a central office terminal (COT) for bilaterally transmitting wireless optical signals having different unique wavelengths; anda plurality of remote terminals (RTs) connected to the COT in a ring, for dropping a wireless optical signal of a corresponding unique wavelength from the wireless optical signals transmitted from the COT, for adding a corresponding optical transmission signal to wireless optical signals of remaining wavelengths except for the corresponding unique wavelength of the dropped wireless optical signal, and for bilaterally transporting the wireless optical signals to which the corresponding optical transmission signal is added.2. The system of claim 1 , wherein the number of different unique wavelengths is set to be equal or greater than the number of RTs connected to the COT in the ring.3. The system of claim 1 , wherein the COT multiplexes the wireless optical signals having different unique wavelengths claim 1 , and transmits ...

INFORMATION PROVISION SYSTEM, SERVER, TERMINAL DEVICE, INFORMATION PROVISION METHOD, DISPLAY CONTROL METHOD AND RECORDING MEDIUM

For setting a tag ID in association with a content supposed to be provided to a portable terminal, the server acquires the location information of an illumination device of which the content is already stored in the memory and sets a tag ID in association with an illumination device that is away from the location presented by the location information by a given or longer distance. Then, the server associates and stores in the memory the set tag ID, location information of the illumination device transmitting the tag ID, content supposed to be provided. Subsequently, the server receives the tag ID and location information transmitted from a portable terminal, determines the content to transmit based on the received location information and the element stored in the memory, and transmits the determined content to the portable terminal. 1. An information provision system including a plurality of transmission devices presents at different locations each other , a terminal device , and a server providing contents to the terminal device , whereinthe transmission devices each comprise:a first transmitter modulating identification information for identifying the content and transmitting the modulated element by means of light as a transmission medium,the terminal device comprises:a light receiver receiving the element transmitted from the first transmitter by means of light as a transmission medium;an identification information acquirer demodulating the light received by the light receiver and acquiring the identification information;a location information acquirer acquiring location information of the self; anda second transmitter transmitting the identification information acquired by the identification information acquirer and the location information of the self acquired by the location information acquirer to the server, andthe server comprises:a storage associating and storing the location information of the transmission device, identification information, and content ...

USPL-FSO LASERCOM POINT-TO-POINT AND POINT-TO-MULTIPOINT OPTICAL WIRELESS COMMUNICATION

Enhancements in optical beam propagation performance can be realized through the utilization of ultra-short pulse laser (USPL) sources for laser transmit platforms, which are can be used throughout the telecommunication network infrastructure fabric. One or more of the described and illustrated features of USPL free space-optical (USPL-FSO) laser communications can be used in improving optical propagation through the atmosphere, for example by mitigating optical attenuation and scintillation effects, thereby enhancing effective system availability as well as link budget considerations, as evidenced through experimental studies and theoretical calculations between USPL and fog related atmospheric events. 1. An optical communication apparatus comprising:an ultra-short-pulse-laser (USPL) source that generates a beam comprising light pulses each having a duration of approximately 1 of nanosecond or shorter;a modulation element that applies a modulation signal to the beam generated by the USPL source to generate a modulated optical signal, the modulation signal carrying data for transmission to a second optical communication apparatus;an optical transceiver that receives the modulated optical signal and transmits the modulated optical signal for receipt by the second optical communication apparatus.2. An optical communication apparatus as in claim 1 , wherein the modulation element comprises at least one of a direct modulation element claim 1 , an indirect modulation element claim 1 , and an external modulation element claim 1 , the external modulation element being external to the USPL source.3. An optical communication apparatus as in claim 1 , wherein the duration is less than approximately a picosecond.4. An optical communication apparatus as in claim 1 , wherein the duration is less than approximately a femtosecond.5. An optical communication apparatus as in claim 1 , wherein the duration is less than approximately an attosecond.6. An optical communication apparatus ...

Visible light communication method using dmx-512 network and apparatuses for the same

Disclosed herein are a Visual Light Communication (VLC) method and apparatus using a DMX-512 network. The VLC apparatus includes a DMX signal generation unit and a DMX signal transmission unit. The DMX signal generation unit generates VLC data packets each including a DMX header, fragmentation information, and a data fragment. The DMX signal transmission unit transmits the VLC data packets to an LED lighting apparatus coupled over a DMX-512 network in order to perform VLC.

TRANSMITTER, RECEIVER FOR VISIBLE LIGHT COMMUNICATION AND METHOD USING THE SAME

A visible light wireless communication receiver includes: a source code recognizing unit that receives a source bit stream and recognizes the source bit stream as source codes of a unit of a first number of bits; and a line coding unit that encodes each of the source codes into an encoding code of a unit of a second number of bits, the second number being larger than the first number. In particular, in the encoding code, the number of bits corresponding to 1 is the same as the number of bits corresponding to 0. Therefore, the change in brightness of lighting may be minimized in the visible light wireless communication. 1. A visible light wireless communication method , comprising:receiving a source bit stream and recognizing the source bit stream as source codes of a unit of a first number of bits;encoding each of the source codes into an encoding code of a unit of a second number of bits, the second number being larger than the first number; andwherein the encoding code has the same number of bits corresponding to 1 as the number of bits corresponding to 0,wherein the first number is 4 and the second number is 6, andwherein the encoding encodes each of the source codes “0000”, “0001”, “0010”, “0011”, “0100”, “0101”, “0110”, “0111”, “1000”, “1001”, “1010”, “1011”, “1100”, “1101”, “1110”, “1111” into any one of the encoding codes “001110”, “001101”, “010011”, “010110”, “010101”, “100011”, “100110”, “100101”, “011001”, “011010”, “011100”, “110001”, “110010”, “101001”, “101010”, “101100”.2. The visible light wireless communication method according to claim 1 , wherein the visible light wireless communication method uses at least any one of “111000” and “000111” among twenty 6-bit patterns in which the number of bits corresponding to 1 is the same as the number of bits corresponding to 0 as an idle pattern.3. The visible light wireless communication method according to claim 2 , wherein the visible light wireless communication method uses at least any one of “110100” ...

Illumination System

The present invention allows flexible reinstallation of a region capable of communicating with a wireless LAN and a master and a repeater of a wireless LAN in conformity with a site to install an illumination system. Therefore, the present invention is an illumination system including an illumination unit using a device emitting a light by having a direct current power supplied thereto. The illumination system of the present invention includes: a general purpose terminal allowing to be connected to a communication system capable of communicating with an external device spaced apart from the illumination system, the terminal also capable of supplying an electric power to the communication system; and a conversion unit supplying the direct current power applied to the illumination unit to the general purpose terminal by converting the power to be used in the communication system.

METHOD OF PERFORMING HANDOVER IN WIRELESS OPTICAL COMMUNICATION AND MOBILE STATION USING THE SAME

In a wireless optical communication system, while a mobile station including a wireless optical transmitting/receiving apparatus, i.e., an optical mobile station (OMS), is mounted in a moving object and moves, the mobile station performs handover from a previous optical base station (OBS) to a new OBS. Here, the mobile station may include at least one OMS, and when the mobile station includes two OMSs, soft handover is performed, and when the mobile station includes one OMS, hard handover is performed. 1. A method of performing handover in a wireless optical communication system , the method comprising:transmitting, by an access gateway (AG), a beacon driving signal to a second optical base station (OBS) and transmitting a handover command to a first optical mobile station (OMS), when handover is requested in a state in which the first OMS and a first OBS of a mobile station communicate;changing, by the AG, a path for transmitting downlink traffic from a first path that is formed between the first OMS and the first OBS to a second path that is formed between a second OMS and the second OBS, when a message for forming a communication link with the second OMS of the mobile station is received from the second OBS; andtransmitting an acknowledgment message of the message that requests to form the communication link to the second OBS.2. The method of claim 1 , further comprising:transferring, by the first OMS of the mobile station, the handover command to the second OMS;transmitting, by the second OMS, a message that requests to form a communication link to the second OBS; andtransmitting, by the second OBS, a message that requests to form a communication link with the second OMS of the mobile station to the AG.3. The method of claim 1 , further comprising:transmitting, by the AG, the acknowledgment message to the second OBS and transmitting a communication link cancellation message to the first OBS; andreceiving, by the AG, an acknowledgment message of the communication ...

Modulation for coded light transmission

Coded light has been proposed to enable advanced control of light sources and transmit information using light sources. Sequences of channel symbols to drive the light source are determined from sequences of source symbols such that no visible flicker is present in coded light emitted by the light sources. Each source symbol is mapped to a composite channel symbol comprising at least one first channel symbol which may be identical to the current source symbol and at least one second channel symbol which may be a function of the current source symbol and at least one future and/or past source symbol. 118. A light driver () for driving at least one light source arranged to emit coded light based on a control signal , the light driver comprising:{'b': '1', 'a receiver arranged to receive a sequence u=[u, . . . , uk, . . . uK] of source symbols uk representing an information sequence of an information source;'}{'b': '1', 'a processing unit arranged to determine, from the sequence of source symbols, a sequence z=[z, . . . , zk, . . . , zK] of channel symbols zk forming the control signal;'}a transmitter arranged to provide the at least one light source with the control signal thereby driving the at least one light source;{'b': 1', '2', '1', '2', '2, 'wherein the processing unit is arranged to determine the sequence of channel symbols z by mapping each source symbol uk at time k to a composite channel symbol zk=(zk,, zk,) comprising at least one first channel symbol zk,, one of which is identical to uk, and at least one second channel symbol zk, having a value chosen from a set M, wherein the value of zk, is determined according to a weighting function having the source symbol uk and at least one future and/or past source symbol ui, i≠k as input arguments, the weighting function comprising at least two non-zero weighting factors, the mapping resulting in that the power spectral density at frequency zero of the sequence z of channel symbols is equal to zero, and wherein'} ...

FREE SPACE OPTICS BROADBAND HOME NETWORK

A system comprises a transmitter including a laser configured to generate a laser beam directed at a spot on a surface, and a laser driver connected to the laser and configured to modulate input data onto the laser beam. The system may further comprise a receiver including an optical detector configured to decode received light into raw data, a signal processor configured to decode the raw data into the original input data, and telescope optics configured to receive light reflected from the spot on the surface, collimate the light and converge the light onto the optical detector. 121-. (canceled)22. An apparatus , comprising:a guide member;a receiver device including an optical detector configured to decode received light into raw data, a signal processor configured to decode the raw data into input data, and telescope optics mounted to an angle adjustment at an end of the guide member and configured to receive light reflected from a spot on a surface external to the receiver device and focus at least a portion of the light onto the optical detector, the angle adjustment configured to allow the telescope optics to be aimed (i) substantially parallel to the guide member to facilitate passing of the apparatus through a bore and (ii) towards the spot on the surface; anda transmitter device including a laser configured to generate a laser beam directed at a spot on a second surface external to the receiver device, and a laser driver connected to the receiver device and the laser and configured to receive the input data from the receiver device and modulate the input data onto the laser beam.23. The apparatus of claim 22 , further comprising a second angle adjustment mounted at a second end of the guide member and allowing the transmitter device to be aimed (i) substantially parallel to the guide member to facilitate passing of the apparatus through the bore and (ii) towards the spot on the second surface claim 22 ,24. The apparatus of claim 23 , wherein the second angle ...

Method of providing additional information on each object within image by digital information display device, digital information display device for the same, and visible light communication terminal for receiving additional information

A method and apparatus for providing additional information to a visible light communication terminal through visible light communication by an information display device having a back light unit is provided. The method includes, when the visible light communication terminal is located in one area corresponding to at least one additional information providing area that is disposed within a screen of the information display device, receiving time slot information allocated to the one area through the visible light communication, when the visible light communication terminal is located in remaining areas of the at least one area corresponding to the at least one object, except for the one area, receiving additional information on all objects from the remaining areas through the visible light communication, and acquiring additional information on the object corresponding to the one area from among the additional information on all the objects by using the allocated time slot information.

OPTICAL TRANSMISSION APPARATUSES, METHODS, AND SYSTEMS

Apparatuses, systems, and methods are disclosed that provide for an agile coherent optical modem that can generate agile RF waveforms and data rates on a generic opto-electronic hardware platform. An “agile coherent optical modem” [ACOM] approach to optical communications by employing a software configurable and adaptive technologies to the transport system. The ACOM generate agile RF waveforms and data rates on a generic opto-electronic hardware platform. By employing advanced communication techniques to the optical domain such as wavelength agility, waveform agility, and symbol rate agility, it is possible to enable robust optical communications. The ACOM allows for the transport capacity of a communications link to be varied, thereby accommodating variations in transport conditions, range, opacity, etc. 1. An agile coherent optical system comprising: a client interface configured to receive electrical signals;', 'a signal processing unit configured to process the electrical signals and produce electrical RF signals as waveforms having both amplitude and phase characteristics; and', 'an optical transport unit receiving the electrical RF signals and including a vector modulator capable of transporting information as optical signals having waveforms and data rates corresponding to the electrical RF signals provided by the signal processing unit, while preserving the amplitude and phase characteristics of the electrical RF signals;', 'an optical transport unit including a polarization diversity coherent receiver capable of receiving information as an optical signal having waveforms and data rates from the agile optical transmitter and producing electrical RF signals preserving the amplitude and phase characteristics of the waveform;', 'a signal processing unit configured to process the electrical RF signals from the optical transport unit and produce electrical signals containing the information carried by the waveforms; and', 'a client interface configured to ...

VISIBLE LIGHT COMMUNICATION METHOD AND APPARATUS

A visible light communication method and terminal are provided for communicating with a visible light coordinator which discriminates between at least one communication area cell that includes at least one light source and a boundary area positioned between the communication area cell and another communication area cell adjacent to the communication cell area, and which provides time division visible light communication. Data of the visible light communication terminal is received from the visible light coordinator using a first time slot in a first communication area cell determined according to a position of the visible light communication terminal. The visible light coordinator is communicated with using a second time slot assigned from the visible light coordinator, when the visible light communication terminal is located in a boundary area of the first communication area cell. The second time slot has not been assigned to the visible light communication terminal. 1. A visible light communication method in a visible light communication terminal communicating with a visible light coordinator which discriminates between at least one communication area cell that includes at least one light source and a boundary area positioned between the communication area cell and another communication area cell adjacent to the communication cell area , and which provides time division visible light communication , the method comprising the steps of:receiving data of the visible light communication terminal from the visible light coordinator using a first time slot in a first communication area cell determined according to a position of the visible light communication terminal; andcommunicating with the visible light coordinator using a second time slot assigned from the visible light coordinator, when the visible light communication terminal is located in a boundary area of the first communication area cell,wherein the second time slot has not been assigned to the visible light ...

PREAMBLE DESIGN FOR SUPPORTING MULTIPLE TOPOLOGIES WITH VISIBLE LIGHT COMMUNICATION

For use in visible light communication (VLC), synchronization with multiple topology support while transmitting an extended preamble includes transmitting a two-part preamble sequence. The preamble sequence includes one or more repetitions of a fast locking pattern (FLP) configured to be used clock synchronization, and one or more repetitions of a topology dependent pattern (TDP) configured to be used to distinguish a plurality of VLC topologies. The method for transmitting an extended preamble includes generating an extended preamble and transmitting the extended preamble during a receive or idle mode for maintaining visibility support and for better synchronization performance. 1. A method , comprising: one or more repetitions of a fast locking pattern (FLP) configured to be used for clock synchronization, and', 'one or more repetitions of a topology dependent pattern (TDP) configured to be used to distinguish a plurality of VLC topologies., 'transmitting a two-part preamble sequence, the preamble sequence comprising223.-. (canceled) The present application incorporates by reference U.S. Non-Provisional patent application Ser. No. 12/871,770 filed Aug. 30, 2010, entitled “PREAMBLE DESIGN FOR SUPPORTING MULTIPLE TOPOLOGIES WITH VISIBLE LIGHT COMMUNICATION,” U.S. Provisional Patent Application No. 61/276,782 filed Sep. 16, 2009, entitled “MULTIPLE PREAMBLES FOR SUPPORTING MULTIPLE APPLICATIONS WITH VISIBLE LIGHT COMMUNICATION,” and U.S. Provisional Patent Application No. 61/280,139 filed Oct. 30, 2009, entitled “MULTIPLE PREAMBLES FOR SUPPORTING MULTIPLE APPLICATIONS WITH VISIBLE LIGHT COMMUNICATION.”The present application relates generally to visible light communication and, more specifically, to preamble design and the use of multiple preambles to support multiple topologies in visible light communication.Visible light communication (VLC) is a new technology for short-range optical wireless communication using visible light in optically transparent media. This ...

HIGH SPEED FREE-SPACE OPTICAL COMMUNICATIONS

High power, high speed VCSEL arrays are employed in unique configurations of arrays and sub-arrays. Placement of a VCSEL array behind a lens allows spatial separation and directivity. Diffusion may be employed to increase alignment tolerance. Intensity modulation may be performed by operating groups of VCSEL emitters at maximum bias. Optical communications networks with high bandwidth may employ angular, spatial, and/or wavelength multiplexing. A variety of network topologies and bandwidths suitable for the data center may be implemented. Eye safe networks may employ VCSEL emitters may be paired with optical elements to reduce optical power density to eye safe levels. 1. An optical communications device for free-space optical communication , comprising:one or more clusters of laser emitters configured to emit one or more laser beams;an optical diffusing element configured to receive the one or more laser beams and output a diffuse cone for each of the one or more laser beams;one or more collimating lenses configured to combine the diffuse cone into a bundle of laser beams;one or more collection lenses configured to receive and focus the bundle of laser beams into a focused bundle of laser beams; andone or more clusters of laser detectors configured to receive the focused bundle of laser beams from the one or more collection lenses, wherein each cluster of detectors is configured to be optically coupled with a corresponding cluster of emitters by the one or more collimating lenses and the one or more collection lenses.2. The optical communications device of claim 1 , wherein the bundle of laser beams is configured to over-fill or under-fill the one or more collection lenses based on a desired amount of translational tolerance.3. The optical communications device of claim 2 , further comprising a photovoltaic device configured to surround each laser detector among the one or more clusters of laser detectors to collect excess laser energy when the bundle of laser beams ...

Multiple Return Link

A system and method for improving efficiency of satellite communications is described. In one embodiment, multiple return links are associated with a single forward link to reduce communications costs. 1. A satellite communications method , comprising:transmitting a single message to a plurality of mobile terminals in a first direction on a satellite link having a higher communication cost, the single message including a common query for each of the plurality of mobile terminals to return a position report regarding their respective locations; andreceiving, in response to the single message, a plurality of position reports from the plurality of mobile terminals in a second direction having a lower communication cost.2. The method of claim 1 , wherein the plurality of communications in the second direction are on a plurality of different frequencies3. The method of claim 1 , wherein the plurality of communications in the second direction occur after a fixed delay after a single communication in the first direction.4. The method of claim 1 , wherein the plurality of communications in the second direction include positioning information.5. The method of claim 1 , wherein the plurality of communications in the second direction include code phase information.6. The method of claim 1 , wherein the plurality of communications in the second direction include sensor information.7. A satellite communications system claim 1 , comprising:a transmitter that is configured to transmit a single message to a plurality of mobile terminals in a first direction on a satellite link having a higher communication cost; anda receiver that is configured to receive, in response to the single message, a plurality of status reports from the plurality of mobile terminals in a second direction having a lower communication cost, wherein the plurality of communications in the second direction are on a plurality of different frequencies.8. The system of claim 7 , wherein the plurality of ...

MOBILITY ACROSS SATELLITE BEAMS USING L2 CONNECTIVITY

Systems and methods for providing mobility across satellite beams, are described. The system includes a first core node, a second core node in communication with the first core node at layer-2 of the OSI model (L2), and a first gateway in communication, at L2, with the first core, the first gateway configured to provide access to a first spot beam at a first location. The system further includes a second gateway in communication, at L2, with the second core node, the second gateway configure to provide access to a second spot beam at a second location, and a mobile device, at the first location, in communication, with the first gateway via the first spot beam, wherein the mobile device is assigned an IP address by the first core node. The mobile device moves from the first location to the second location. Further, the first gateway, in response to the mobile device moving from the first location to the second location, notifies the second gateway, through the first core node and the second core node, that the mobile device is moving to the second location, and transmits the session information to the second gateway, and the second gateway, in response to the notification, maintains connectivity with the mobile device using the IP address. 118.-. (canceled)19. A system for providing mobility across satellite beams , the system comprising:a first core node configured for processing at multiple layers of the OSI-model;a first gateway in communication, at layer-2 of the OSI model (L2), with the first core node, the first gateway configured to transmit and receive network access communications for a first spot beam;a second gateway in communication, at L2, with the first core node, the second gateway configured to transmit and receive network access communications for a second spot beam;a mobile device, at a first location within the first spot beam, in communication with the first gateway via the first spot beam, the communication comprising at least one communication ...

METHOD AND APPARATUS FOR THE ZONAL TRANSMISSION OF DATA USING BUILDING LIGHTING FIXTURES

This invention relates to systems and methods for the transmission of data by a wireless controller connected between a power source and a lighting device. The wireless controller wirelessly receives control signals to control dimming and on/off operation of the lighting device. Furthermore, energy use of the lighting device is monitored and information about the energy use is sent wirelessly to a receiver. 1. A wireless controller configured for connection between a power source and a ballast , comprising:a control signal circuit configured to wirelessly receive control signals to control dimming and on/off operation of the ballast;a switching circuit configured to control power to the ballast in accordance with the wirelessly received control signal; anda monitor circuit configured to:monitor energy use controlled by the control circuit, including energy use of the ballast or one or more luminaires associated with the ballast, andwirelessly send information about the energy use to a receiver.2. The wireless controller of wherein the control signal is decoded in one or more computer processors with an algorithm.3. The wireless controller of wherein the one or more computer processors comprises at least a microprocessor.4. The wireless controller of wherein the receiver is at least one of the group consisting of: a peer device claim 1 , a host computer claim 1 , and a remote host computer.5. The wireless controller of wherein the switching circuit is configured to control the power to the ballast with one or more computer processors that execute an algorithm.6. The wireless controller of further comprising an optical light sensor configured to measure a light level.7. The wireless controller of wherein the switching circuit is further configured to encode a message as an optical signal by generating a plurality of frequencies to modulate electrical energy supplied to each luminaire so as to modify light output level.8. The wireless controller of further comprising a ...

Contactless chip card, contactless chip card reading device and contactless communication system including a plurality of communication interfaces

A contactless chip card may include: a first communication interface which is configured to receive a first signal by means of an electromagnetic field with a first frequency; a clock signal generating circuit which is coupled to the first communication interface and is configured to derive a clock signal from the first signal; a second communication interface which is coupled to the clock signal generating circuit and is configured to make available a signal transmission on the basis of the clock signal by means of an electromagnetic field with a second frequency, wherein the first frequency is different from the second frequency.

Method And A System Of Providing Multi-Beam Coverage Of A Region Of Interest In Multi-Beam Satellite Communication

A method of providing multi-beam coverage of a Region of Interest (ROI) in a multi-beam satellite communication system in which a non-uniform traffic demand density is defined over said Region of Interest, the method including partitioning the Region of Interest into N>1 non-overlapping cells (V-V, V); and generating N satellite beams, each of the satellite beams providing coverage of a respective cell. The step of partitioning the Region of Interest into N>1 non-overlapping cells is performed in such a way that the traffic demand associated to the cells is substantially uniform. Advantageously, the cells form a Voronoi diagram defined over the Region of Interest, the satellite beams being pointed towards the cells of the Voronoi diagram. A satellite communication system implementing the method is also provided. 1. A method of providing multi-beam coverage of a Region of Interest (ROI) in a multi-beam satellite communication system , wherein a non-uniform traffic demand density is defined over said Region of Interest , comprising:{'sub': 1', '10', 'i, 'partitioning said Region of Interest into N>1 non-overlapping cells (V-V, V); and'}{'sub': 1', '70', 'i, 'generating N satellite beams (B-B, B), each of said satellite beams providing coverage of a respective cell;'}the method being characterizing in that said step of partitioning said Region of Interest into N>1 non-overlapping cells is performed in such a way that an integrated traffic demand associated to said cells is substantially uniform.2. A method according to wherein said partitioning said Region of Interest into N>1 non-overlapping cells is performed by an iterative algorithm comprising the steps of:{'sub': 1', '10', 'i, 'a. defining a set of N generator points (p-p, p) distributed over said Region of Interest;'}b. determining a set of N Voronoi cells for said generator points, partitioning said Region of Interest;c. determining an integrated traffic demand for each of said Voronoi cells; andd. iteratively ...

APPARATUS AND METHOD FOR ALIGNING VISIBLE LIGHT COMMUNICATION DEVICES IN VISIBLE LIGHT COMMUNICATION SYSTEM

A method for aligning among visible light communication devices comprises the following steps: generating a visible light signal and transmitting same to a corresponding device; determining whether the visible light signal that is output via the screen of the device is identifiable; correcting the color of the visible light signal that is output on the screen if the visible light signal is not identifiable; and using the visible light signal that is corrected to perform alignment for visible light communicating with the corresponding device. 1. A method for alignment between visible light communication devices , comprising:generating a visible light signal and transmitting the visible light signal to a counterpart device by a device;determining whether or not the visible light signal output through a screen of the device is identifiable;calibrating a color of the visible light signal output on the screen when the visible light signal is not identifiable; andperforming alignment for visible light communication with the counterpart device by using the calibrated visible light signal.2. The method of claim 1 , wherein determining whether or not the visible light signal is identifiable comprises:receiving an input of an image including the visible light signal by using a camera unit mounted to the device; anddetermining that the visible light signal is not identifiable, when the color of the visible light signal included in the image has a value smaller than a predetermined threshold value.3. The method of claim 2 , wherein when the image is received claim 2 , the device automatically compares the color of the visible light signal included in the image with the predetermined threshold value claim 2 , and then determines whether or not the visible light signal is identifiable.4. The method of claim 1 , wherein calibrating the color of the visible light signal comprises more brightly calibrating color brightness of the visible light signal by a predetermined threshold ...

Coded light emitting device

The invention relates to an illumination device for embedding data symbols of a data signal into a luminance output of the illumination device. The device includes a LED comprising at least two segments which have a common electrode and are individually controllable. The LED is configured to generate the luminance output in response to a drive signal. The device further includes a controller configured for switching one of the segments on or off in response to the data signal to embed data symbols of the data signal into the light output of the device. One advantage of such an approach is that the proposed device is compatible with conventional LED drivers since no additional electronics for modulating the drive signal are necessary, which enables simple implementation and reduced costs.

TRANSMISSION SYSTEM, TRANSMITTER AND RECEIVER

According to one embodiment, a transmission system includes a transmitter and a receiver. The transmitter includes a modulator configured to modulate transmission data at a chip rate to generate a modulation signal, and one or a plurality of light sources configured to emit visible light according to the modulation signal. The receiver includes a light receiver having one or more lines of light receiving elements to receive light in a first range including the visible light; and a demodulator configured to demodulate image data generated according to the light received by the light receiver to generate reception data corresponding to the transmission data. A following equation is satisfied ff Подробнее

Apparatus and method for supporting mobilility of a mobile terminal that performs visible light communication

A method and apparatus for supporting mobility of a mobile terminal in a Visible Light Communication (VLC) system. The method includes activating only necessary light sources for VLC considering the mobility of the mobile terminal, instead of using total light sources for VLC. Consequently, power consumption can be significantly reduced.

VISIBLE-LIGHT COMMUNICATION SYSTEM AND METHOD

Disclosed is a visible light communication system including a transmission device, including multiple light emitting units emitting light of different colors and mapping transmission data to a chromaticity point, calculating luminescence of each of the light emitting units, generating a preamble signal for channel matrix estimation, and emitting light based on the preamble signal and calculated luminescence amount. A reception device of the visible light communication system includes multiple light receiving units and estimates a channel matrix based on a corresponding optical signal when an optical signal corresponding to the preamble signal is received in each light receiving unit, compensates the optical signal corresponding to the chromaticity point for a propagation path based on the estimated channel matrix, detects a chromaticity point on the chromaticity coordinates based on a signal after the propagation path compensation, and demodulates the transmission data. 1. A transmission device for Visible Light Communication (VLC) comprising:multiple light emitting units to emit different colors of light;a luminescence controller to modulate transmission data with combination of colors emitted from each of the multiple light emitting units and to calculate a luminescence amount of each of the multiple light emitting units, to radiate a combined color corresponding to the combination of corresponding colors;a preamble signal generator to generate a preamble signal using an estimation of a channel matrix; anda light emission controller to control the luminescence amount of each of the multiple light emitting units based on the generated preamble signal and to simultaneously emit signals from each of the light emitting units according to the luminescence amount calculated by the luminescence controller.2. The transmission device as claimed in claim 1 , further comprising a chromaticity coordinate modulator to match the transmission data to a predetermined chromaticity ...

HANDOVER BETWEEN ATC AND SATELLITE COMPONENT OF AN INTEGRATED MSS/ATC SYSTEM

A communications system comprising a first transceiver and a second transceiver, which system employs a device that measures power over a frequency band from sources other than those monitoring downlink radiation received at a radio terminal from the satellite, and a controller that receives these power measurements to determine on which frequency channel within a band a transmitter is to transmit. 1. A communication system comprising:at least a first transceiver including at least a first receiver and at least a first transmitter;at least a second transceiver including at least a second receiver and at least a second transmitter;a device that measures power over a frequency band from sources other than those monitoring downlink radiation received at a radio terminal from a satellite;a controller that receives and processes said measurements to determine in which frequency channel within the band a transmitter is to transmit; andwherein signal to noise ratio is measured instead of power.2. The communication system as defined in wherein said at least second transceiver transmits the said frequency channel to said at least first transceiver to determine frequency for said first transceiver to transmit to said second transceiver.3. A method for handing over wireless communications in a satellite communications system claim 1 , the satellite communications system comprising at least one satellite that is configured to wirelessly communicate with at least one radio terminal in a satellite coverage area over a satellite frequency band and an ancillary terrestrial component that is configured to wirelessly communicate with at least one radio terminal in the satellite coverage area over at least some of the satellite frequency band claim 1 , to thereby terrestrially reuse at least some of the satellite frequency band claim 1 , the handover method comprising:handing over wireless communications with a radio terminal from the ancillary terrestrial component to the satellite ...

PROCESS OF SPECTRUM DIVERSITY OF SATELLITE LINK FOR DATA AND INTERNET APPLICATIONS USING SINGLE ANTENNA AND ROUTER

A satellite communication system between a source and a destination over multiple satellite communications paths including first identifying the link performance established in multiple spectrums, performing a link comparison among the multiple spectrums (for example C-, Ku-, or Ka-Band) in order to determine a spectrum link that provides the highest throughput within an acceptable reliability criteria, and switching among the multiple spectrum links to provide that determined spectrum link between the source and the destination. 1. A method for communication to a destination over multiple satellite links using different spectrums , respectively , comprising: using C- , Ku- , and Ka-Bands for data communication in a single antenna dish and single router , and measuring link performance parameters during the data communication , wherein data communication is permitted to the destination via a selected one of the Bands in accordance with a comparison between the measured link performance parameters and predetermined criteria.2. The method according to claim 1 , further comprising the steps of:a. measuring the link performance parameters in real time;b. storing the measured link performance parameters in the destination;c. real time updating of the stored link performance parameters;d. determining a link that serves as a guaranteed link for communication;e. determining another alternative link, the guaranteed link have a lower throughput than the throughput of the another alternative link;f. simultaneously establishing a plurality of physical connections over the satellite link(s) from the source to the destination;g. switching between the guaranteed and the another alternative links so as to uniquely establish a single IP link between the source to the destination at any given time.3. The method according to claim 2 , wherein the method is for two way communication between a source and the destination claim 2 , and wherein the links include two different spectrum ...

CALL ESTABLISHMENT OPTIMIZATION FOR IMS BASED MOBILE SATELLITE SYSTEM

IMS nodes and a satellite radio access node (RAN) are described herein which are operative to establish certain calls (e.g., voice calls) with reduced latency and selectively using a High Penetration Alert (HPA) page to reach a terminating satellite user equipment (UE). 126242441504446423634babbbbbb. An Application Server (AS) () which takes part in establishing a call between an originating user equipment (UE) () and a terminating satellite UE () , wherein the AS is a component in an IP Multimedia Subsystem (IMS) () , wherein the IMS further comprises at least a Home Subscriber Server (HSS) () , a Proxy Call Session Control Function (P-CSCF) () , a Serving Call Session Control Function (S-CSCF) () , and a Policy Charging and Rule Function (PCRF) () , wherein the IMS is coupled to an access network () , and wherein the access network is further coupled to a satellite radio access network () , the AS comprising:{'b': '901', 'a processor (); and'}{'b': '903', 'a memory () that stores processor-executable instructions where the processor interfaces with the memory and executes the processor-executable instructions to enable following operations{'b': '902', 'receive (), from the access network, a Session Initiation Protocol (SIP) INVITE message associated with the call for the terminating satellite UE;'}{'b': 904', '51, 'retrieve () a High Penetration Alert (HPA) subscription () if any associated with the terminating satellite UE; and'}{'b': '906', 'if the terminating satellite UE has the HPA subscription, then send (), the PCRF, an Authorize and Authenticate Request (AAR) message to: (1) initiate a Network Initiated Secondary PDP Context Activation (NRSPCA) on Offer in order to establish a secondary Packet Data Protocol (PDP) context between the access network and the terminating satellite UE via the satellite radio access network, and (2) initiate transmission of a HPA page to the terminating satellite UE.'}2904a. The AS of claim 1 , wherein the processor further ...

METHOD AND APPARATUS WITH ERROR CORRECTION FOR DIMMABLE VISIBLE LIGHT COMMUNICATION

An apparatus and method using error correcting for visible light communication are provided. The error correction includes generating an encoded message from an original message by using a predetermined coding method, puncturing the encoded message based on a determined dimming value or rate, and/or puncturing rate, generating a scrambled message by scrambling the punctured message, and providing the scrambled message to a visible light source. 1. A visible light communication method , the method comprising:encoding an information message using a predetermined error correction coding scheme that has a bit length N different from a bit length of the information message;puncturing the encoded message based on a desired dimming rate and a set pattern, with the punctured message including non-punctured bits and punctured bits;generating a scrambled message by scrambling the non-punctured bits of the punctured message and combining the scrambled non-punctured bits with the punctured bits of the punctured message; andproviding the scrambled message to a visible light source.2. The method of claim 1 , wherein the predetermined error correction coding minimizes a generation of errors during the puncturing of the encoded message.3. The method of claim 2 , wherein the predetermined error correction coding method is trellis-based turbo coding.4. The method of claim 1 , wherein the scrambling of the non-punctured bits equalizes a resultant total number of binary ones and a resultant total number of binary zeros in the scrambled non-punctured bits.5. The method of claim 1 , wherein the puncturing of the encoded message includes setting all of the punctured bits to binary zero.6. The method of claim 1 , wherein the punctured message and the scrambled message have respective bit lengths of N.7. The method of claim 6 , wherein a total number of non-punctured bits is based upon the desired dimming rate and is less than N claim 6 , and the generating of the scrambled message includes ...

Coding Scheme And Method For A Colour-Shift-Keying Constellation In A Visible-Light Communication System

A coding scheme for a colour-shift-keying constellation in a visible-light communication system is provided, whereby a minimum number of flipped bits between symbols assigned to neighbouring symbol points in the constellation is aimed. Improved assignments of symbol values to symbol points of the constellation may be provided, which may be capable of reducing a total Hamming distance between all symbol points in the constellation, thereby leading to a reduction of a bit-error ratio. 18-. (canceled)9. A colour coding and/or decoding unit , comprising:a transmitter configured to implement a coding scheme coding scheme for a colour-shift-keying constellation in a visible-light communication system,{'b': 0', '15, 'wherein the colour-shift-keying constellation includes sixteen symbol points, S-S,'}wherein the symbol points have a numbered order and location within the colour-shift-keying constellation according to IEEE 802.15.7 specifications, and [{'b': '0', 'S is assigned by a binary symbol value of 0110;'}, {'b': '1', 'S is assigned by a binary symbol value of 0001;'}, {'b': '2', 'S is assigned by a binary symbol value of 0011;'}, {'b': '3', 'S is assigned by a binary symbol value of 0101;'}, {'b': '4', 'S is assigned by a binary symbol value of 0010;'}, {'b': '5', 'S is assigned by a binary symbol value of 0000;'}, {'b': '6', 'S is assigned by a binary symbol value of 0111;'}, {'b': '7', 'S is assigned by a binary symbol value of 1110;'}, {'b': '8', 'S is assigned by a binary symbol value of 1010;'}, {'b': '9', 'S is assigned by a binary symbol value of 1011;'}, {'b': '10', 'S is assigned by a binary symbol value of 1001;'}, {'b': '11', 'S is assigned by a binary symbol value of 1111;'}, {'b': '12', 'S is assigned by a binary symbol value of 0100;'}, {'b': '13', 'S is assigned by a binary symbol value of 1101;'}, {'b': '14', 'S is assigned by a binary symbol value of 1100; and'}, {'b': '15', 'S is assigned by a binary symbol value of 1000.'}], 'wherein each of the ...

QUANTUM BASED INFORMATION TRANSFER SYSTEM AND METHOD

A method and system for transferring data comprising : 1. A system for transferring data in the form of sequential qubits from a sender to a receiver comprising :an entangled photon source for producing first and second entangled photons, the first entangled photon becoming associated with a receiver, the second entangled photon being associated with a sender;a Bell state measurement device for performing a joint Bell state measurement on the second entangled photon and a first sequential qubit with encoded data; the Bell state measurement device outputting two bits of data to be used at the receiver;a transmission channel for transmitting two bits of information from the outcome of the Bell state measurement device to the receiver;at the receiver, a unitary transformation device operatively connected to the transmission channel for performing a unitary transformation operation on the first entangled photon based upon the value of the two bits of data;at least one detector operatively connected to the unitary transformation device for detecting encoded information from the first entangled photon;at least one processor operatively connected to the at least one detector, the at least one processor operating to determine whether or not to transmit portions of data from the next sequential qubit based upon the value of the previous sequential qubit measured at the receiver location, and wherein based upon the value of the at least one qubit measured at the receiver location, data compression occurs such that fewer qubits are used to transmit a message to the receiver without changing the content of the data transferred.2. The system of wherein the unitary transformation device comprises a half wave plate and two quarter waveplates claim 1 , and wherein based upon the values of the two bits of data claim 1 , the unitary transform device performs one of (a) no operation on the first entangled photon claim 1 , (b) a half-wave plate operation claim 1 , (c) a combination of ...

INFORMATION COMMUNICATION DEVICE

An information communication method includes: setting an exposure time of an image sensor so that, in an image obtained by capturing a subject by the image sensor, a bright line corresponding to an exposure line included in the image sensor appears according to a change in luminance of the subject; capturing the subject that changes in luminance by the image sensor with the set exposure time, to obtain the image including the bright line; and obtaining information by demodulating data specified by a pattern of the bright line included in the obtained image. 1. An information communication method of obtaining information from a subject , the information communication method comprising:setting an exposure time of an image sensor so that, in an image obtained by capturing the subject by the image sensor, a bright line corresponding to an exposure line included in the image sensor appears according to a change in luminance of the subject;capturing the subject that changes in luminance by the image sensor with the set exposure time, to obtain the image including the bright line; andobtaining the information by demodulating data specified by a pattern of the bright line included in the obtained image.2. The information communication method according to claim 1 ,wherein in the capturing, a plurality of exposure lines included in the image sensor are exposed sequentially, each at a different time.3. The information communication method according to claim 1 ,wherein in the obtaining, the data specified by a pattern in a direction perpendicular to the exposure line in the pattern of the bright line is demodulated.4. The information communication method according to claim 1 ,wherein in the setting, the exposure time is set to less than 10 milliseconds.5. The information communication method according to claim 1 ,wherein in the capturing, the subject that changes in luminance at a frequency greater than or equal to 200 Hz is captured.6. The information communication method ...

ROBUST BEAM SWITCH SCHEDULING

Systems and methods are described for robust scheduling of beam switching patterns in satellite communications systems. Embodiments operate in context of a hub-spoke satellite communications architecture having a number of gateway terminals servicing large numbers of user terminals over a number of spot beams. The satellite includes switching subsystems that distribute capacity to the user beams from multiple of the gateway terminals in a shared manner according to a beam group switching pattern. The beam group switching pattern is robustly formulated to continue distributing capacity during gateway outages (e.g., when one or two gateway terminals are temporarily non-operational due to rain fade, equipment failure, etc.). For example, the beam group switching pattern can be formulated to minimize worst-case degradation of capacity across user beams, to prioritize certain beams or beam groups, etc. 1. A satellite communications system for robust sharing of gateway resources between a plurality of gateway terminals and a plurality of user terminals over a plurality of fixed location beams , the system comprising: input subsystems configured to receive forward-link communications from a plurality of gateway terminals via a plurality of input beams;', 'output subsystems configured to transmit the forward-link communications to a plurality of user terminals via a plurality of output beams; and', 'a beam group switching subsystem associated with a plurality of the input subsystems and at least one of the plurality of output subsystems and configured, according to a beam group switching pattern, to sequentially couple the associated input subsystems with the at least one associated output subsystem in such a way that distributes capacity to each associated output subsystem in a shared manner from at least two of the associated input subsystems., 'a satellite comprising2. The system of claim 1 , wherein:at least one output subsystem comprises a transmit switching subsystem ...

Information communication device

An information communication method includes: obtaining a first image by capturing a subject; detecting a range of the subject from the first image; determining, from among a plurality of exposure lines, predetermined exposure lines for capturing the range of the subject; setting an exposure time so that, in a second image obtained using the predetermined exposure lines, a bright line appears according to a change in luminance of the subject; obtaining the second image including the bright line, by capturing the subject that changes in luminance using the predetermined exposure lines with the set exposure time; and demodulating data specified by a pattern of the bright line included in the obtained second image.

SPATIAL LIGHT COMMUNICATION DEVICE

The spatial light communication device is constituted with a spatial light transmitter which is installed in a fixed manner in a plurality of places, stores preset ID information of its own and has a light emitting portion for emitting spatial light on which the ID information is superimposed, and a spatial light receiver which is connected to a handheld terminal, has a light receiving portion for receiving spatial light emitted from the light emitting portion of the spatial light transmitter and also has a light receiving circuit for amplifying and outputting a light receiving signal of the light receiving portion. The spatial light receiver is provided with a connector portion which is connected to a microphone input terminal of the handheld terminal as a terminal for outputting a light receiving output signal of the light receiving circuit to the handheld terminal. 1. A spatial light communication device comprising:a spatial light transmitter which has a light emitting portion for emitting spatial light on which an information signal stored in advance or an information signal input externally is superimposed; anda spatial light receiver which is connected to a handheld terminal, has a light receiving portion for receiving spatial light emitted from the light emitting portion of the spatial light transmitter and also has a light receiving circuit for amplifying and outputting a light receiving signal of the light receiving portion;whereinthe spatial light transmitter is provided with the light emitting portion which emits spatial light from a light emitting element, a light emission driving circuit which drives the light emitting element so as to emit light and a transmission signal reproducing portion which modulates a carrier wave by the information signal stored in advance or the information signal input externally to reproduce a transmission signal, thereby outputting the signal to the light emission driving circuit, andthe spatial light receiver is provided ...

Method And System For Guard Band Detection And Frequency Offset Detection

A signal processing circuit, which is within a satellite reception assembly, may be operable to analyze actual frequency information corresponding to a plurality of downconverted signals. Each of the downconverted signals may be downconverted using one or more corresponding local oscillators (LOs). Based on the analyzing, one or more of the following may be determined: one or more frequency offsets associated with the one or more corresponding LOs and one or more actual guard bands. The signal processing circuit may generate information on the determined frequency offsets and the determined actual guard bands. The signal processing circuit may perform, based on the generated information, one or both of a band stacking operation and a channel stacking operation so as to prevent channels/bands being stacked on each other or being overlapped. The signal processing circuit may perform, based on the generated information, frequency corrections for channel tuning in a gateway. 1. A method , comprising: analyzing actual frequency information corresponding to a plurality of downconverted signals; wherein each of the plurality of downconverted signals is downconverted using one or more corresponding local oscillators (LOs) in the signal processing circuit;', one or more frequency offsets, which are associated with the one or more corresponding local oscillators (LOs), in relation to corresponding standard LO frequencies; and', 'one or more actual guard bands between adjacent frequency bands;, 'determining, for each of the downconverted signals and based on the analyzing, one or more of at least the following, 'generating, for the plurality of downconverted signals, information on one or more of at least the following: the determined frequency offsets and the determined actual guard bands; and', during the band stacking operation, frequency bands are not stacked on each other or stacked frequency bands do not overlap; and', 'during the channel stacking operation, channels are ...

CONTENT SUPPLYING SYSTEM WHICH USES SPATIAL LIGHT TRANSMISSION

A spatial light transmitter of a content supplying system stores ID information of its own and emits spatial light on which the ID information is superimposed from a light emitting portion. A spatial light receiver is used by being connected to a handheld terminal and receives spatial light emitted from the spatial light transmitter. When a user carries the handheld terminal and moves close to the spatial light transmitter, the spatial light receiver receives spatial light emitted from the spatial light transmitter, and ID information obtaining means of the spatial light receiver obtains the ID information which is superimposed on spatial light from a light receiving signal of the light receiving portion, thereby outputting the ID information to the handheld terminal. Alternatively, the ID information obtaining means of the handheld terminal obtains the ID information on the basis of the light receiving signal, and the handheld terminal reproduces the content selected on the basis of the ID information. 1. A content supplying system which uses spatial light transmission comprising:a spatial light transmitter which is provided with an ID information storage portion for storing ID information of its own and also provided with a light emitting portion for emitting spatial light on which the ID information is superimposed;a handheld terminal which is provided with content storing means for storing content information so as to correspond to the ID information and also provided with content reproducing means for reproducing content read from the content storing means as text, images, video or sounds; anda spatial light receiver which is connected to the handheld terminal and provided with a light receiving portion for receiving spatial light emitted from the light emitting portion of the spatial light transmitter, whereinID information obtaining means for obtaining the ID information which is transmitted by being superimposed on spatial light from a light receiving signal ...

VISIBLE LIGHT COMMUNICATION METHOD AND APPARATUS

Disclosed herein are a visible light communication method and apparatus. The visible light communication method includes determining whether a current location is the start of a symbol of a transmission signal, setting a sample index, a signal accumulated value for an accumulation region of a front half portion of the symbol, and a signal accumulated value for an accumulation region of a rear half portion of the symbol, determining whether the sample index belongs to an accumulation region of the front or rear half portion of the symbol, and accumulating samples of the transmission signal in accordance with the location to which the sample index belongs, determining whether a current location corresponds to the end of the symbol, and outputting a Variable Pulse Position Modulation (VPPM) communication signal corresponding to the transmission signal. 1. A visible light communication method , comprising:determining whether a current location is a start of a symbol of a transmission signal by comparing the symbol of the transmission signal with a symbol clock synchronized with the symbol;setting a sample index, indicative of a sequential position number of each of samples obtained by sampling the symbol of the transmission signal at intervals of a predetermined frequency, a signal accumulated value for an accumulation region of a front half portion of the symbol, and a signal accumulated value for an accumulation region of a rear half portion of the symbol, based on results of the determination of whether the current location is the start of the symbol of the transmission signal;determining whether the sample index belongs to an accumulation region of the front or rear half portion of the symbol by comparing the sample index with a midpoint of the symbol of the transmission signal, and accumulating samples of the transmission signal in accordance with the location to which the sample index belongs;determining whether a current location corresponds to an end of the ...

OLED DISPLAY FOR VISIBLE RAY COMMUNICATION

Provided is an organic light emitting diode (OLED) display device for visible ray communication, including: a substrate; a plurality of OLED pixels that are formed on the substrate and generate a red (R), green (G), or blue (B) visible ray; and a plurality of light receiving units that are formed on the substrate to sense a visible ray signal and convert the visible ray signal to an electrical signal. 1. An organic light emitting diode (OLED) display device for visible ray communication , comprising:a substrate;a plurality of OLED pixels that are formed on the substrate and generate a red (R), green (G), or blue (B) visible ray; anda plurality of light receiving units that are formed on the substrate to sense a visible ray signal and convert the visible ray signal to an electrical signal.2. The OLED display device of claim 1 , further comprising a control unit that controls the plurality of OLED pixels to display an image on a screen formed of the plurality of OLED pixels and receives a visible ray signal that is received by the plurality of light receiving units.3. The OLED display device of claim 2 , wherein together when receiving the visible ray signal claim 2 , the control unit detects a position of each of the light receiving units on a screen at which the visible ray signal is received.4. The OLED display device of claim 3 , wherein coordinates of the light receiving units on the screen are stored in the control unit in one-to-one correspondence.5. The OLED display device of claim 3 , wherein coordinates of the light receiving units on the screen corresponding to identification numbers of the light receiving units are stored in the control unit in advance claim 3 , andwherein the light receiving units transmit the identification numbers to the control unit, together with the received visible ray signal.6. The OLED display device of claim 2 , wherein the control unit transmits claim 2 , by controlling the OLED pixels claim 2 , a visible ray signal at the same ...

Method and Device for Providing Notifications in a System for Visible-Light communication

A method for providing visible notification by a device in a visible-light-communication system based on Institute of Electrical and Electronic Engineers (IEEE) standard 802.15.7, wherein higher levels are allowed to invoke through one standardized interface a medium-access-control sub-layer to provide color-function support and enables invocation of a transmission of color, visibility, and dimming frames by a higher layer, which creates a unified interface between the MAC sub-layer and the higher layers, while providing a primitive for requesting, by the at least one upper layer to the at least one interface of the medium-access-control entity layer, a transmission of at least one visibility frame. 110.-. (canceled)11. A method for providing visible notification by a device in a system for visible-light communication , the device including a medium-access-control entity (MAC) , the method comprising:interfacing the device between a physical layer (PHY) and at least one upper layer, the at least one upper layer being hierarchically arranged above the medium-access-control entity (MAC), the medium-access-control entity (MAC) including at least one interface (MLME-SAP, MCPS-SAP) to said at least one upper layer; andproviding a primitive for requesting, by the at least one upper layer to the at least one interface (MLME-SAP, MCPS-SAP) of the medium-access-control entity (MAC), a transmission of at least one visibility frame.12. The method according to claim 11 , further comprising:providing a primitive for confirming, by the at least one interface (MLME-SAP, MCPS-SAP) of the medium-access-control entity (MAC) to the at least one upper layer, a transmission of the at least one visibility frame.13. The method according to claim 11 , wherein primitive for requesting comprises at least one of:(i) a parameter defining a number of times a color visibility dimming (CVD) frame is repeatedly sent,(ii) a parameter defining a color of the CVD frame during a pertinent repetition,( ...

INTRAPERSONAL DATA COMMUNICATION SYSTEMS

Intrapersonal communication systems and methods that provide an optical digital signal link between two or more local devices are disclosed. In some embodiments, the system includes a first signal converter disposed at a first end of the optical digital signal link and configured to convert between electrical digital signals from a first local device and optical digital signals from the optical digital signal link. The system can include an optical connector having a non-contact portion configured to couple optical digital signals between the first signal converter and the optical digital signal link across a gap. The system can include a second signal converter disposed at a second end of the optical digital signal link and configured to convert between electrical digital signals from the second local device and optical digital signals from the optical digital signal link. 1. A headgear system having an interference-resistant optical digital signal link configured to transmit optical digital signals between two or more local devices , the headgear system comprising:an exterior shell;a guide path adjacent to the exterior shell, the guide path configured to direct the optical digital signal link between a first optical connector having a non-contact portion and a second optical connector having a non-contact portion;a first signal converter having a first local device electrical data interface and a first optical data interface, wherein the first local device electrical data interface is configured to electrically connect to a first electrical data connector of a first local device, and wherein the first signal converter is configured to convert between electrical digital signals and optical digital signals;the first optical connector having a non-contact portion configured to couple optical digital signals between the first optical data interface of the first signal converter and a first end of the interference-resistant optical digital signal link across a first ...

Information System Including a Card and a Card Reader Connected Optically

An information system comprises a card and a card reader. The card and the card reader can be coupled by an optical communication module and an optical power transfer module. Operations of the card can be powered by the power transferred from the card reader through the optical power transfer module. In one embodiment, the card and the card reader comprise multiple cells of transmitter/receiver that transmit and receive data in a parallel manner

GROUND ASSISTED SATELLITE ANTENNA POINTING SYSTEM

Methods, systems, and devices are described for orienting a satellite antenna. In the methods, systems, and devices of the present disclosure, a satellite may provide multiple spot beams, each of the spot beams associated with a specific coverage area. The satellite may also transmit a wide beam downlink signal over a wide area beam having a coverage area that includes each of the spot beams. The satellite may receive an uplink beacon signal. The satellite antenna may be positioned according to azimuth and elevation determined from ground measurements of the spot beams and the satellite measurements of the uplink beacon signal. 1. A method of orienting a satellite antenna , the method comprising:transmitting a plurality of downlink spot beam signals over a plurality of spot beams from a satellite, each of the spot beams associated with a specific coverage area;transmitting a wide beam downlink signal over a wide area beam from the satellite, the wide area beam associated with a coverage area that includes each of the spot beams;receiving an uplink beacon signal at the satellite;generating azimuth and elevation antenna pointing error signals using a measurement of the uplink beacon signal;generating azimuth and elevation antenna pointing bias signals using a plurality of spot beam signal strength measurements made at a plurality of ground measurement terminals, the spot beam signal strength measurements made relative to the wide beam downlink signal; andpositioning the satellite antenna based at least in part on the azimuth and elevation antenna pointing error signals and the azimuth and elevation antenna pointing bias signals.2. The method of claim 1 , wherein the plurality of downlink spot beam signals comprise forward link communication signals.3. The method of claim 1 , wherein the plurality of downlink spot beam signals comprise beacon signals generated at the satellite.4. The method of claim 1 , further comprising:generating a yaw bias signal using a plurality ...

Home network of connected consumer devices

A lighting device has a light emitter receptacle, a power connector configured to connect to a power source, the power connector connected to the receptacle, and a communication module. A network of lighting devices has a plurality of lighting devices, each light device including a communications module, and a light emitter receptacle. The network is a wireless, ad hoc network having nodes corresponding to the lighting devices, wherein one of the lighting devices acts as a master node, the master node having a port connected to an external network and a nonvolatile memory.

FREE SPACE OPTICAL COMMUNICATIONS LINK NODE, NETWORK AND METHOD OF TRANSMITTING TRAFFIC

A free space optical communications link node comprising transmitter apparatus comprising a first optical transmitter , arranged to transmit high priority traffic on a first upstream optical signal having a first wavelength and at a first optical signal power, and a second optical transmitter arranged to transmit low priority traffic on a second upstream optical signal having a second wavelength, different to the first wavelength, and at a second optical signal power. The node further comprises receiver apparatus comprising a first optical amplifier arranged to receive and amplify a first downstream optical signal having a third wavelength and carrying high priority traffic and a second downstream optical signal having a fourth wavelength, different to the third wavelength, and carrying low priority traffic. The node further comprises traffic handling control apparatus comprises a power monitor arranged to monitor an optical signal power of the first downstream optical signal and a controller arranged to generate and transmit a control signal if said optical signal power is below a first threshold value. The control signal is arranged to cause the second optical signal power to have a value which is unsuitable for transmission. 1. A free space optical communications link node comprising: a first optical transmitter arranged to transmit high priority traffic on a first upstream optical signal having a first wavelength and at a first optical signal power; and', 'a second optical transmitter arranged to transmit low priority traffic on a second upstream optical signal having a second wavelength different to the first wavelength and at a second optical signal power; and, 'transmitter apparatus comprising 'a first optical amplifier arranged to receive and amplify a first downstream optical signal having a third wavelength and carrying high priority traffic and a second downstream optical signal having a fourth wavelength different to the third wavelength and carrying low ...

VISIBLE LIGHT COMMUNICATION METHOD IN AN INFORMATION DISPLAY DEVICE HAVING AN LED BACKLIGHT UNIT, AND INFORMATION DISPLAY DEVICE FOR THE METHOD

Proposed is a method for providing additional information to a mobile communication terminal by means of visible light communication in an information display device having an LED backlight unit. For this purpose, the method of the present invention comprises the steps of: receiving, from a mobile communication terminal, a request for additional information on an object in a content image when a content image is being displayed on a screen of an information display device; determining whether or not there exists additional information corresponding to the request; and controlling, if said additional information does exist, the light emission of the LED backlight unit so as to transmit said additional information in the form of visible light to the mobile communication terminal. Further, according to the present invention, it is possible to provide various additional information corresponding to the request from the mobile communication terminal. 1. A method of visible light communication by an information display device comprising an LED backlight unit , the method comprising:displaying an image including one or more objects;receiving a request for additional information on the one or more objects;determining an object corresponding to an area where the request for the additional information is received among the one or more objects;searching for additional information on the determined object;transmitting, when there is no found additional information, a request for additional information including information on the information display device to a server; andtransmitting, when the additional information corresponding to the information on the information display device is received from the server, the received additional information through an LED of an area where the determined object is located among a plurality of LEDs within the LED backlight unit.2. The method of claim 1 , wherein the request for the additional information is received from one or more mobile ...

HIGH CAPACITY SATELLITE COMMUNICATIONS SYSTEM

A high capacity satellite communications system including a satellite with a beam for a forward downlink focused on a geographic area for which disproportionately higher capacity is desired, a hub located in a geographic area for which disproportionately lower capacity is desired, compared to the location of a VSAT, and the VSAT located in area where a beam for a forward downlink received by the VSAT from the satellite does not overlap with a beam for a return downlink received by the hub from a satellite. 1. A high capacity satellite communications system comprising:at least one satellite with at least one beam for a forward downlink focused on a first geographic coverage area;at least one hub located in a second geographic coverage area which is different from the first geographic coverage area, the first geographic coverage area and the second geographic coverage area configured with disproportionate amounts of bandwidth capacity such that the first geographic coverage area provides more bandwidth capacity and the second geographic coverage area provides less bandwidth capacity; andat least one VSAT located in the first geographic coverage area where a first beam for the forward downlink received by the VSAT from a satellite does not overlap with a second beam for a return downlink received by a hub from the satellite.2. The system of claim 1 , wherein the at least one hub is configured to use a return bandwidth that is at most half of a forward bandwidth.3. The system of claim 1 , wherein the at least one satellite is configured to switch to one or more redundant hubs if that at least one hub is unavailable.4. The system of claim 1 , wherein the at least one satellite is configured to use as few carriers as possible for the forward downlink based on the continuity of the frequencies available to the at least one satellite and a maximum bandwidth capacity of the at least one VSAT.5. The system of claim 1 , wherein the at least one VSAT uses one of SCMA and CPM on ...

Data transmission method and related device and system

Embodiments of the present invention disclose a data transmission method and a related device and system. A data transmission method includes: A transmitter performs scrambling, constellation modulation, and multiple-input multiple-output precoding processing sequentially on downlink user data to obtain a precoded symbol sequence; performs time-frequency resource mapping on the precoded symbol sequence to obtain frequency domain data of an OFDM symbol; performs conjugate symmetric extension and IFFT on the frequency domain data of the OFDM symbol to obtain a time domain real-number sequence; performs CP insertion processing on the time domain real-number sequence to form a first downlink time domain baseband signal; loads the first downlink time domain baseband signal onto a direct current of a LED lighting circuit to form a LED driving electrical signal; and converts the LED driving electrical signal into a visible beam of the LED for transmission.

Information communication device

An information communication method includes: setting an exposure time of an image sensor to less than or equal to 1/2000 second so that, in an image obtained by capturing a subject by the image sensor, a stripe bright line parallel to a plurality of exposure lines included in the image sensor appears according to a change in luminance of the subject; obtaining the image including the stripe bright line parallel to the plurality of exposure lines by, using the set exposure time, starting exposure sequentially for the plurality of exposure lines each at a different time; and obtaining information by demodulating data according to, in a pattern of the bright line included in the obtained image, a brightness change in a direction perpendicular to the plurality of exposure lines.

LED LIGHT GLOBAL POSITIONING AND ROUTING COMMUNICATION SYSTEM

An LED light and communication system includes at least one optical transceiver, the optical transceiver including a light support and a processor. The light support has a plurality of light emitting diodes and at least one photodetector attached thereto. The processor is in communication with the light emitting diodes and the at least one photodetector, where the processor is constructed and arranged to illuminate at least one of the light emitting diodes to generate a light signal which in turn includes at least one embedded data packet. The at least one embedded data packet communicates global positioning system (GPS) location information. 1. An LED light and communication system comprising:at least one optical transceiver, the at least one optical transceiver comprising:at least one light emitting diode and at least one photodetector attached thereto, the at least one light emitting diode generating illumination, said illumination comprising a plurality of flashes of illumination, said flashes of illumination not being observable to the unaided eyes of an individual;a processor in communication with the light emitting diodes and the at least one photodetector, the processor being constructed and arranged to regulate said plurality of flashes of illumination into at least one communication signal, said at least one communication signal comprising at least one address.2. The system of claim 1 , the at least one address comprising global positioning system (GPS) location information.3. The system of claim 2 , the at least one communication signal comprising at least one data packet.4. The system of claim 1 , the at least one communication signal comprising a destination address claim 1 , wherein the destination address includes global positioning system (GPS) location information.5. The system of claim 1 , the at least one communication signal comprising a origin address claim 1 , wherein the origin address includes global positioning system (GPS) location ...

TRANSMITTER, RECEIVER, TRANSMISSION METHOD, RECEPTION METHOD AND COMMUNICATION SYSTEM

A transmitter includes an optical data modulation unit which modulates an optical carrier having a first frequency with a data signal and outputs the optical carrier as a signal light, an optical frequency shift unit which shifts and outputs the frequency of the signal light from the first frequency to a second frequency based on a predetermined frequency offset amount, and a frequency offset control unit which controls the frequency offset amount such that a harmonic component generated in the optical frequency shift unit does not overlap with a band of the data signal. 1. A transmitter comprising:an optical data modulation unit which modulates an optical carrier having a first frequency with a data signal and outputs the optical carrier as signal light;an optical frequency shift unit which shifts and outputs the frequency of the signal light from the first frequency to a second frequency based on a predetermined frequency offset amount; anda frequency offset control unit which controls the frequency offset amount such that a harmonic component generated in the optical frequency shift unit does not overlap with a band of the data signal.2. The transmitter according to claim 1 ,wherein the frequency offset control unit controls such that the frequency offset amount is one fourth or more of whole band width of the data signal.3. The transmitter according to claim 1 , further comprising:a frequency shift amount calculation unit which outputs a dynamic frequency shift amount to be applied to the signal light in a propagation path of the signal light,wherein the optical frequency shift unit shifts the frequency of the signal light from the first frequency to the second frequency based on the frequency offset amount and the dynamic frequency shift amount.4. A communication system comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the transmitter according to ; and'}a receiver which receives signal light that the transmitter transmits and coherently receives ...

CAPACITY MAXIMIZATION FOR A UNICAST SPOT BEAM SATELLITE SYSTEM

Methods, systems, and apparatuses are presented for improved satellite communications. The satellite system may comprises at least one gateway, a satellite in orbit configured to communicate with the at least one gateway and provide a plurality of spot beams, and a plurality of subscriber terminals. The spot beams may include a first spot beam to illuminate a first region and a second spot beam to illuminate a second region adjacent to and overlapping with the first region. The first spot beam as sent to at least one subscriber terminal may be affected by (1) interference from other signal sources including the second spot beam at a signal-to-interference ratio C/I and (2) noise at a signal-to-noise ratio C/N. Reception of signals from the first spot beam by the at least one of the first plurality of subscriber terminals may be interference-dominated such that C/I is less than C/N. 1a transmission subsystem operable to generate a plurality of service link signals;a spot beam antenna system coupled to the transmission subsystem and operable to emit to create a plurality of service link spot beam signals each in a corresponding spot beam, wherein:each of the plurality of spot beams is operable to illuminate a distinct geographic area when the satellite is placed into orbit, andportions of a first one of the plurality of spot beams overlaps a second one of the plurality of spot beams so that a signal-to-interference ratio of a first one of said service link signals in the first one of said plurality of spot beams is interference-dominated by interference caused by a second one of the service link signals in the second one of the plurality of spot beams.. A satellite for illuminating a geographic area with signals, the satellite comprising: This application is a continuation of, and claims priority to, U.S. patent application Ser. No. 13/591,126, entitled “Capacity Maximization for a Unicast Spot Beam Satellite System,” filed Aug. 21, 2012, which is a continuation of, ...

WIRELESS MAINTENANCE OF INTRAPERSONAL COMMUNICATION SYSTEMS

Some embodiments are provided for performing wireless maintenance procedures on personal equipment systems. Personal equipment systems can include wireless communication systems that allow external systems, users, or both to maintain the systems and/or run diagnostic procedures. Personal equipment systems are provided having one or more local devices coupled thereto and in wired communication with one another. Personal equipment systems can include a wireless system and local devices attached to a headgear system, the local devices being in wired communication with one another and in wireless communication with external systems. The wireless communication system is configured to establish a wireless connection with external systems for maintenance of local devices that are in wired communication with each other. Methods for performing wireless maintenance of personal equipment systems are described. 1. (canceled)2. A personal equipment system configured to be worn or carried by a user , the system comprising:a wireless communication system having an antenna configured to send and receive electromagnetic signals, a transceiver electrically coupled to the antenna, and one or more processors electrically coupled to the transceiver and configured to encode information received by the antenna for wired delivery to one or more local devices coupled to the personal equipment system;a maintenance module coupled to the wireless communication system and configured to send and receive information to one or more local devices coupled to the personal equipment system;a first local device comprising a visualization system electrically coupled to the wireless communication system, the visualization system having a user interface element and a visualization optical data interface, wherein the user interface element is configured to change a state of the wireless communication system when activated, and wherein the visualization optical data interface comprises a visualization ...

WIRELESS COMMUNICATION METHOD, BASE STATION AND SYSTEM

Embodiments of the present invention provide a wireless communication method, base station and system. The base station includes several LED lights and/or several VLC/IR receivers. The several LED lights are configured to send downlink signals in an OFDMA standard to a user terminal, and the several VLC/IR receivers are configured to receive uplink signals that are of an SC-FDMA standard and sent by the user terminal. The base station further includes a baseband signal processing unit configured to equate the several LED lights and/or the several VLC/IR receivers with radio remote units of an LTE mode to perform processing and resource management. The embodiments of the present invention are capable of reusing baseband signal processing and resource management manners in an existing LTE system, thereby simplifying resource management and baseband signal processing operations performed by the base station, and saving the base station resources. 127-. (canceled)28. A base station , comprising:a plurality of light emitting diode (LED) lights, configured to send downlink signals of an orthogonal frequency division multiple access (OFDMA) standard to a user terminal; anda baseband signal processing unit, configured to designate the plurality of LED lights as radio remote units of a long term evolution (LTE) mode, and to perform processing and resource management on the downlink signals sent by the plurality of LED lights.29. The base station of claim 28 , wherein the plurality of LED lights are grouped into multiple LED light groups according to a space distance claim 28 , and each of the LED light groups is configured to send claim 28 , to the user terminal claim 28 , a downlink signal that is of the OFDMA standard and has an independent frame structure.30. The base station of claim 29 , wherein each of the LED light groups comprises multiple LED light subgroups claim 29 , wherein each LED light subgroup is configured to send a downlink signal that is of the OFDMA ...

COMMUNICATION SYSTEM FOR POWER ELECTRONIC CONVERTERS

Exemplary embodiments of a communication system for a power electronic converter with a plurality of converter modules includes controllable power semiconductor switches and individually mountable onto a converter cabinet or frame. The communication system includes unguided transmission of optical signals between optical elements arranged on a converter module and on the converter cabinet, respectively. The communication system provides a free-space optical signal transmission between two distinct parts of the converter that combines the flexibility offered by radio transmission and the data rate and reliability of optical communication, while at the same time avoiding the complex and expensive cabling of optical fiber solutions. 1. A communication system for a power electronic converter with a plurality of converter modules individually mountable in a converter cabinet , comprising:a first optical element and a second optical element that propagate an optical signal to or from the respective other optical element, the first and second optical elements being arranged respectively on the converter cabinet and on a converter module, andan optically transparent medium including a straight optical path between the first optical element and the second optical element.2. The communication system according to claim 1 , wherein the straight optical path isolates a potential difference in excess of 1 kV claim 1 , between the converter cabinet and the converter module.3. The communication system according to claim 2 , wherein the straight optical path isolates a potential difference in excess of 3 kV.4. The communication system according to claim 1 , wherein the transparent optical medium is air and a shield protects the straight optical path against non-transparent obstacles.5. The communication system according to claim 2 , wherein the optically transparent medium is air claim 2 , and the straight optical path passes through openings in a solid electrical isolator arranged ...

Multi-Dimensional Adaptive Transmission Technique

Method and apparatus for dynamically optimizing the transmission level of each remote terminal in a satellite-based communication network. Each remote terminal maintains quasi-error-free communication at the highest efficiency level available under changing link conditions and network configurations, without requiring the reservation of substantial power margins, which results in a much more efficient satellite network. 1operating a remote terminal in an installation mode when the remote terminal is installed or when its configuration is modified, and operating the remote terminal in a normal mode at other times.. A method comprising: The present application is a continuation of U.S. patent application Ser. No. 13/401,156, filed Feb. 21, 2012, and entitled “MULTI-DIMENSIONAL ADAPTIVE TRANSMISSION TECHNIQUE,” which is a continuation of U.S. patent application Ser. No. 12/337,330, filed Dec. 17, 2008, and entitled “MULTI-DIMENSIONAL ADAPTIVE TRANSMISSION TECHNIQUE,” which is a non-provisional of U.S. Provisional Patent Application Ser. No. 61/014,478, filed on Dec. 18, 2007, and entitled “MULTI-DIMENSIONAL ADAPTIVE TRANSMISSION TECHNIQUE,” each of which are incorporated by reference herein in their entirety for all purposes.The invention relates to the field of satellite data transmission, and in particular to a method and apparatus for adaptively controlling transmission power in a satellite transmission system.In satellite communication systems, the cost of the satellite resource (space segment) is determined both according to bandwidth and to signal power. Often, a significant power margin is assumed in order to insure proper operation in non-ideal locations and under interferences such as rain or other atmospheric disturbances. These circumstances are often perceived by the end user as availability and performance problems with the overall satellite system.There is a need for a system that can dynamically optimize transmission power levels in response to link, ...

Light module, illumination system and method incorporating data in light emitted

Proposed is a light module () comprising at least two primary light sources () capable of emitting a primary color light. This allows the light module to emit light having intensity (Y) and color coordinates (x,y) through additive color mixing of the constituent primary colors. The light module further comprises an modulator () capable of modulating the primary light sources enabling embedment of data in the light emitted. The modulator () is arranged to modulate the color coordinates of the light emitted for embedding the data. This is especially advantageous as the sensitivity of the human eye to changes in color is lower than to changes in intensity. The invention thus advantageously allows embedding the data into the light emitted from the light modules () of an illumination system () without reducing the performance of its primary function as an aid to human vision. 1. A light module comprising:at least two primary light sources capable of emitting a primary color light enabling the light module to emit light having intensity (Y) and color coordinates (x,y); anda modulator for modulating the primary light sources enabling embedding of data in the light emitted, wherein the modulator is configured to modulate the color coordinates of the light emitted for embedding the data.2. The light module according to claim 1 , wherein the data comprises a light module identification code.3. The light module according to claim 1 , wherein the modulator is arranged to modulate the light according to a spread spectrum modulation scheme.4. The light module according to claim 1 , further comprising a detector arranged to determine the color coordinates (x claim 1 ,y) of light emitted by he light module for calibrating the light emitted.5. The light module according to claim 1 , wherein the modulator is arranged to make use of a modulation alphabet claim 1 , defining at least two chromaticity coordinates and representing at least a logical “0” and a logical “1” claim 1 , for ...

VLC MODULATION SYSTEM AND METHOD THEREOF

A VLC (Visible Light Communication) modulation system and method thereof, which includes a visible light generating device and a visible light receiving device. The visible light generating device includes a visible light emitting module and an arbitrary waveform generator. The arbitrary waveform generator further includes a first finite impulse response filtering unit, a pre-distortion amount control unit, and a second finite impulse response filtering unit. 1. A visible light communication (VLC) modulation system , comprising: a visible light illuminating module having an adaptive filter;', a first finite impulse response filtering unit configured to generate a first impulse signal to a first convolution unit;', 'a pre-distortion amount control unit configured to generate a short impulse signal, wherein the pre-distortion amount control unit has a memory and a pre-determined parameter is stored in the memory;', 'a second finite impulse response filtering unit configured to generate a second impulse signal, wherein a duty cycle of the second impulse signal is half of a duty cycle of the first impulse signal;, 'an arbitrary waveform generator configured to couple to the visible light illuminating module and generate a amplitude-shift keying (ASK) waveform, wherein the arbitrary waveform generator further comprises], 'a visible light signal generating device configured to generate a visible light signal, which comprisesanda visible light signal receiving device configured to receive the visible light signal.2. The VLC modulation system of claim 1 , wherein the arbitrary waveform generator further comprises:a 4-level mapping unit configured to generate a 4-level ASK signal, according to a data signal, to an up-sampling unit, wherein the up-sampling unit is configured to generate a sampled symbol signal to a 1-symbol delay unit, a first digital adder-subtractor, the first convolution unit and a second convolution unit; anda second adder-subtractor;wherein the 1-symbol ...

LIGHT COMMUNICATION SYSTEM, TRANSMITTER AND RECEIVER

A light communication system, a transmitter and a receiver are provided. The light communication system includes the transmitter and the receiver. The transmitter has a first processing unit and a light-emitting element. The first processing unit produces a transmission signal. The light-emitting element produces light to carry the transmission signal. The receiver has a first variable lens, a photosensitive element and a second processing unit. The first variable lens changes the propagation path of the light. The photosensitive element senses the light passed through the first variable lens to produce a receiving signal. The second processing unit controls the first variable lens based on the signal quality of the receiving signal to change the equivalent channel between the transmission signal and the receiving signal. Therefore, the transmission capability of the light communication system is enhanced. 1. A light communication system , comprising:a transmitter including a first processing unit that generates a transmission signal, and a light-emitting unit that emits light that carries the transmission signal; anda receiver including a first variable lens that receives the light emitted by the light-emitting device and changes a propagation path of the light, a photosensitive element that senses the light passing through the first variable lens to produce a receiving signal, and a second processing unit that controls the first variable lens according to signal quality of the receiving signal in order to change an equivalent channel between the transmission signal and the receiving signal.2. The light communication system of claim 1 , wherein the second processing unit produces a first control signal based on the signal quality of the receiving signal and uses the first control signal to control a curvature claim 1 , an angle claim 1 , a thickness claim 1 , a focal length claim 1 , an axial direction or a refractive index of the first variable lens or a spacing ...

VEHICLE COMMUNICATION SYSTEM FOR VISIBLE LIGHT COMMUNICATION AND OPTICAL NETWORKING AND COMMUNICATION METHOD THEREOF

Provided herein is a communication system and method capable of performing visible light communication and optic networking, the system performing visible light communication with an electronic device inside a vehicle and accessing an optic network inside the vehicle. Accordingly, RF interference and distortion is removed, and thus not effecting use of a wireless device inside the vehicle, thereby reducing malfunction/error of a electronic control device and enabling real time data transceiving in the vehicle. 1. A vehicle communication system comprising:a first communicator configured to perform visible light communication with an electronic device inside the vehicle;a second communicator configured to access an optic network inside the vehicle; anda processor configured to process data received from the electronic device through the first communicator, and to process data received from the optic network through the second communicator2. The vehicle communication system according to claim 1 ,wherein the processor transmits the data received from the electronic device through the first communicator to the optic network through the second communicator, and transmits the data received from the optic network through the second communicator to the electronic device through the first communicator3. The vehicle communication system according to claim 2 ,wherein a frame used in the visible light communication has a same structure as a frame used in the optic network4. The vehicle communication system according to claim 1 ,wherein the second communicator is used for accessing the optic network inside the vehicle when an optic cable is connected, andis used for performing visible light communication with the electronic device inside the vehicle, when light source is exposed outside5. The vehicle communication system according to claim 1 ,further comprising a display configured to display an image received from the electronic device through the first communicator or an image ...

RADIO FREQUENCY SIGNAL TRANSCEIVING DEVICE AND METHOD THEREOF, SELF-OPTIMIZING OPTICAL TRANSMISSION DEVICE AND METHOD THEREOF

A radio frequency signal transceiving method and device thereof are proposed. The method is configured for a radio equipment controller (REC) of a radio frequency signal transceiving device to exchange radio signals between a plurality of Baseband Units (BBUs) and a plurality of Radio Equipments (REs) that respectively connected to a plurality of Remote Radio Units (RRUs), and the method includes but not limited to the step of: receiving a first radio downlink signal at least, generating a first downlink control signal, modulating the first radio downlink signal at least into a first analog downlink signal at a first frequency according to the first downlink control signal, multiplexing the first analog downlink signal and the first downlink control signal into an integrated analog downlink signal, converting the integrated analog downlink signal into an optical downlink signal, and transmitting the optical downlink signal. 1. A radio frequency signal transceiving method , configured for a radio equipment controller (REC) of a radio frequency signal transceiving device to exchange radio signals between a plurality of Baseband Units (BBUs) and a plurality of Radio Equipments (REs) that respectively connected to a plurality of Remote Radio Units (RRUs) , the method comprising:receiving a first radio downlink signal at least;generating a first downlink control signal;modulating the first radio downlink signal at least into a first analog downlink signal at a first frequency according to the first downlink control signal;multiplexing the first analog downlink signal and the first downlink control signal into an integrated analog downlink signal;converting the integrated analog downlink signal into a first optical downlink signal; andtransmitting the first optical downlink signal.2. The radio frequency signal transceiving method according to claim 1 , wherein before the step of multiplexing the first analog downlink signal and the first control signal into the integrated ...

Circuit Architecture and System for Implantable Multi-Function and Multi-Analyte Biosensing Device

An implantable bio-sensing platform architecture that enables the wireless selection, calibration and reading of multiple sensors, as well as checking the power levels of the solar powering source energizing various electronic and optoelectronic devices and circuits embedded in the platform. It also permits checking the operation of the potentiostats interfacing with each amperometric analyte sensor. The platform is flexible to include FET based sensors for protein sensing as well as other applications including pH sensing. In addition, other physiological sensors can be integrated in the platform. 1. An implantable bio-sensing platform that enables the wireless selection , calibration and reading of multiple sensors , wherein the bio-sensing platform receives optical power and coded optical instructions from an external control unit located in proximity of the implanted sensor platform chip , the bio-sensing platform comprising:sensors,sensor interface circuits,signal processors,electronic multiplexers,solar cells, andoptoelectronic transmitters and receivers that wirelessly communicates with the external control unit, wherein the platform receives from the optical transmitter located in the external control unit coded pulses using at least one photodetector operating at the dedicated wavelength and converting them to electrical pulses, wherein the solar cells are interfaced with at least one voltage regulator circuit whose output provides stable power to the entire platform electronic circuits and optoelectronic transmitters and receivers,wherein the coded electrical pulses are decoded using finite state machine architecture by the mode select unit interfacing with the photodetector receiving the coded pulses,wherein the mode select unit includes logic circuits configurable to perform various functions depending on the coded pulses,wherein the coded pulse sequence in one code enables operation of checking solar power output providing information regarding the ...

Lighting device and receiver

There is provided a method and corresponding lighting device (), and a receiver, which employs code modulation which provides a compatibility of code modulation in a dimmable lighting system. The lighting device comprises means for dimming the output light (), which employs multiple dimming modes, each representing dimming the light output from lighting device by means of a respective dimming method, and means for embedding a code in the light output (). The means for embedding a code in the light output employs code modulation which is based on controlling the instantaneous dimmed light output from the lighting device such that the integrated value of the dimmed light output during a time period T is modulated to embed the code. The code may then subsequently be extracted from the modulated light by means of an integrate-and-dump process at a receiver, without knowledge of the dimming method and/or dimming level of the lighting device. 1. A lighting device comprising:at least one light source for providing a light output,dimming component for providing dimming of said light output using a present dimming selected from a multiple of dimming modes, wherein each dimming mode is associated with a respective predetermined dimming method from a multiple of difference dimming methods employable by the lighting device, andan embedding component for embedding a code in said dimmed light output, said embedding component configured to control the instantaneous dimmed light output such that the integrated value of said dimmed light output during a time period T is modulated to embed said code.2. The lighting device according to claim 1 , wherein said code is modulated into said dimmed light output such that it is extractable using integrate-and-dump process.3. The lighting device according to claim 1 , wherein said present dimming mode is selected in response to a requested light output level DL for said light source.4. The lighting device according to claim 3 , when ...

METHOD AND SYSTEM FOR FREE SPACE OPTICAL COMMUNICATION UTILIZING A MODULATED ELECTRO-OPTICAL POLYMER RETRO-REFLECTOR

A free space optical communication system (FSOCS) comprising a modulating retro-reflector (MRR) to receive an interrogation beam from a transceiver, and to modulate and reflect the interrogation beam. The MRR comprising a transmissive electro-optical polymer (EOP) modulator, a signal generator, and a retro-reflector, wherein the transmissive EOP modulator is to modulate the interrogation beam's polarization, the signal generator is operatively coupled to the EOP modulator and is to supply the modulation signal, and the retro-reflector is to reflect a modulated beam back towards the transceiver. 1. A free space optical communication system (FSOCS) , comprising:a modulating retro-reflector (MRR) to receive an interrogation beam from a transceiver, and to modulate and reflect the interrogation beam, the MRR comprising a transmissive electro-optical polymer (EOP) modulator, a signal generator, and a retro-reflector;wherein the transmissive EOP modulator is to modulate the interrogation beam's polarization;wherein the signal generator is operatively coupled to the EOP modulator and is to supply the modulation signal; andwherein the retro-reflector is to reflect a modulated beam back towards the transceiver.2. The FSOCS of claim 1 , wherein the EOP acts as a quarter-wave modulator when a voltage is applied by the signal generator.3. The FSOCS of claim 1 , wherein the interrogation beam passes through the EOP twice.4. The FSOCS of claim 1 , wherein the retro-reflector is a corner-cub retro-reflector.5. The FSOCs of claim 1 , wherein the retro-reflector is a cat's eye retro-reflector.6. The FSOCS of claim 1 , further comprising a collection lens disposed before the EOP.7. The FSOCS of claim 1 , further comprising: a light source to generate the interrogation beam;', 'a beam splitter reflective to a predetermined polarization to deflect the received modulated beam; and', 'a detector to detect the modulated beam deflected by the beam splitter., 'a transceiver to transmit the ...

SELF-IDENTIFYING ONE-WAY AUTHENTICATION METHOD USING OPTICAL SIGNALS

In one aspect, the present disclosure relates to a self-identifying optical transmitter for broadcasting a one-way authentication code using light-based communication. The transmitter may include a memory for storing an identifier of the transmitter, a processor for generating a data signal including an identifier of the transmitter, a modulator for receiving the data signal and generating an electrical signal, the modular generating the electrical signal by modulating the data signal. The transmitter may also include a light source for receiving the electrical signal, converting the electrical signal into an optical signal, and continuously broadcasting the optical signal as an optical data transmission stream. The optical data transmission stream may be used to verify that a receiving mobile device is near the transmitter. The transmitter may also include an optical surface for dispersing the optical data transmission stream as the optical data transmission stream is emitted from the transmitter. 1. A self-identifying optical transmitter for broadcasting a one-way authentication code using light-based communication , the transmitter comprising:a non-volatile memory for storing an identifier of the transmitter;a processor in communication with the memory for generating a data signal comprising the identifier, wherein the data signal identifies the transmitter;a modulator for receiving the data signal and generating an electrical signal, wherein the modular generates the electrical signal by modulating the data signal;a light source for receiving the electrical signal, converting the electrical signal into an optical signal, and continuously broadcasting the optical signal as an optical data transmission stream, wherein the optical data transmission stream is used to verify that a receiving mobile device is in proximity to the transmitter; andan optical surface for dispersing the optical data transmission stream as the optical data transmission stream is emitted ...

INFORMATION PROCESSING SYSTEM, INFORMATION PROCESSING METHOD, CLIENT DEVICE, AND RECORDING MEDIUM

Provided is an information processing system that includes a server and a client device. The server stores identification information and associated content in memory, and transmits the identification information, using light that varies over time as a communication medium. The client device continuously senses and decodes the light varying in time into the identification information, transmits the decoded identification information to the server, receives content transmitted from the server in response to the transmission of identification information, and displays received content. A controller included in the client device detects an operation on the displayed content from an input device, and applies control to transmit process details according to the detection to the server. The server additionally executes the process details transmitted from the client device, and updates the content to content that includes the execution results. 1. An information processing system comprising:a server provided with memory that associates and stores identification information and content;a transmitting device that transmits the identification information, using light that varies over time as a communication medium; and a photosensor,', 'a photosensor controller that controls the photosensor to continuously sense the light,', 'a decoder that decodes the light varying over time and continuously sensed by the photosensor controller into the identification information,', 'a transmitter,', 'a first transmission controller that controls the transmitter to transmit identification information decoded by the decoder to the server,', 'a receiver that receives content transmitted from the server in response to the transmission of identification information by the first transmission controller,', 'an output device that outputs content received by the receiver,', 'a detector that detects an external operation on the content output by the output device, and', 'a second transmission ...