Research on Anti-Interference Control Technology of Satellite Communication Confidential Signal Transmission

Satellite communication secret signal transmission is a kind of spread spectrum communication. It is easy to produce multi-path interference in the process of generating satellite communication secret signal spread spectrum code sequence at the receiver, so it is necessary to suppress the multi-path interference and reduce the bit error rate (BER) of satellite communication confidential signal reception. A multi-path interference suppression algorithm for satellite communication confidential signal transmission based on passive time flip mirror control and matching filtering is proposed. The spread spectrum channel model and satellite communication secret signal transmission model of satellite communication secret signal transmission are constructed. The time mirror inversion technology is used to realize the effective estimation of the channel, the multi-path component of the received array element in satellite communication secret signal transmission is adjusted, the interference signal is decomposed into positive signal and time mirror inversion negative signal, and then the symbol splicing is carried out to realize the compression coding of satellite communication secret signal, and the focusing gain is obtained. The multi-path interference is eliminated. The simulation results show that the algorithm can effectively improve the focusing performance of the output impulse response of the satellite communication confidential signal transmission system, improve the anti-interference ability of satellite communication confidential signal transmission, and reduce the communication bit error rate.