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Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 2. Отображено 2.
24-04-2013 дата публикации

Secret communication method and antenna equipment

Номер: CN103067042A
Автор: Jin Liang, Li Qiaolong, Luo Wenyu, Peng Jianhua, Zhang Ruyun, Huang Kaizhi, Ma Keming, Xu Xiangyang, Zhong Zhou, Song Huawei
Принадлежит:

The invention provides a secret communication method and antenna equipment. The secret communication method and the antenna equipment are used for multiple-antenna equipment. The method comprises that: channel hopping time of modulation symbols of current time in a transmission period is ensured according to a channel hopping rate of a preset wireless channel hopping rule; preprocessing weights in current time with a number corresponding to the channel hopping time are chosen from preprocessing weight collection of preset wireless channel hopping rule; the modulation symbols are preprocessed according to the chosen preprocessing weights to generate sending signals; in the transmission period of the sending signals, according to channel hopping order of the preset wireless channel hopping rule and corresponding wireless information of the channel hopping, channel hopping with the number corresponding to the channel hopping time is proceeded during the transmission process of the sending ...

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Номер записи: 1
10-07-2013 дата публикации

Signal transmission method, signal receiving method, signal transmission device, signal receiving device and signal communication system for achieving secure communication

Номер: CN103199909A
Автор: Jin Liang, Zhang Lijian, Li Qiaolong, Luo Wenyu, Ma Keming, Cui Bo, Li Xiangyu, Song Huawei, Guo Shuming, Xu Xiangyang
Принадлежит:

The invention discloses a signal transmission method, a signal receiving method, a signal transmission device, a signal receiving device and a signal communication system for achieving secure communication. The signal transmission method includes the following steps: estimating a channel matrix between a transmitting end and a legal receiving end through a reverse pilot frequency sequence according to the reciprocity theorem of a wireless channel; determining a weighted vector set of a transmitting antenna according to a weighted vector set of a receiving antenna and the channel matrix between the transmitting end and the legal receiving end; selecting a weighted vector specified in a weighted vector selection rule in the weighted vector set of the transmitting antenna; partitioning an original symbol into transmitting segmented symbols; carrying out weighing processing on the transmitting segmented symbols to generate transmitting segmented symbol vectors with the selected weighted vector ...

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Номер записи: 2