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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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18-04-2023 дата публикации

Rate self-adaption method for single-antenna scatter communication

Номер: CN115987452A
Автор: MENG HAO, WU DAN, WANG WEI, REN WENCHENG, ZHAO JINGYUAN, ZHANG XIAOZHE, GUO MENGQI, XIANG NAN, ZHANG ZIYAN, LIANG HONGGUANG, ZHAO SHIDUO
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The invention relates to the technical field of scatter communication, and provides a rate self-adaption method for single-antenna scatter communication, which is suitable for a scatter communication system which comprises a master station and a slave station. The rate self-adaption method comprises two main processes: symbol rate self-adaption and modulation coding mode self-adaption. The symbol rate self-adaption takes a time frame as a minimum unit and is used for adapting to the slow fading characteristic of a scattering channel; the modulation coding mode adaptively takes a time slot as a minimum unit and is used for adapting to the fast fading characteristic of a scattering channel. According to the rate self-adaption method disclosed by the invention, various fading characteristics of the scattering channel can be effectively tracked by analyzing channel parameters and communication quality in real time and combining symbol rate self-adaption and modulation coding mode self-adaption ...

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Номер записи: 1
04-07-2023 дата публикации

Scattering body positioning and tracking method for troposphere scatter communication

Номер: CN116390030A
Автор: XIANG NAN, WANG WEI, REN WENCHENG, MENG HAO, ZHANG XIAOZHE, GUO MENGQI, ZHANG ZIYAN, LIANG HONGGUANG
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The invention discloses a scatterer positioning and tracking method for troposphere scatter communication, and belongs to the field of wireless communication. In the method, in a scatter communication establishment stage, master and slave stations interact opposite-end position information through Beidou, control an antenna to rotate to an initial azimuth angle, mutually send synchronous waveforms at the initial azimuth angle, compare received synchronous waveform quality information, position an azimuth angle and a pitch angle corresponding to an optimal scatterer, and control the antenna to rotate to the position; in a normal communication stage, received signal quality information is compared with locally stored optimal received signal quality information, if the deviation is within a tolerance range, the azimuth and the pitch angle of the antenna are not adjusted, otherwise, the antennas of the master station and the slave station sequentially carry out secondary scanning and track ...

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Номер записи: 2