Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций
Год издания: 2020
Идентификатор DOI: 10.1109/MWENT47943.2020.9067372
Ключевые слова: broadband signal, intermodulation, modeling, multi-frequency mode, multiplexer, non-linear amplifier, Satellite communication systems
Аннотация: The growing number of subscribers and the volume of transmitted information requires an increase in the capacity of satellite communication systems. This is possible through the use of high orders of signal constellations, spatial separation of channels, effective noise-resistant codes. In addition, the new standards require the efПоказать полностьюfective use of nonlinear power amplifiers that must operate close to saturation. Of interest is the increase in the capacity of satellite communication systems due to the multi-frequency mode in the transponder channel. The article reveals the channel structure, gives a detailed description of the input and output multiplexers, a nonlinear amplifier, a mixer, and a local oscillator. The structure of the computer model of the transponder channel and the multi-frequency signal of the ground station is shown. The simulation results show that the multi-frequency mode introduces additional intermodulation distortion of the carriers of one channel. This requires the development of nonlinear predistortion systems at transmitting ground stations, as well as equalizers at receiving stations. © 2020 IEEE.
Журнал: Moscow Workshop on Electronic and Networking Technologies, MWENT 2020 - Proceedings
Номера страниц: 9067372
Издатель: Institute of Electrical and Electronics Engineers Inc.