跳频卫星信号传输波形设计研究

Research on Waveform Design for Transmission of Frequency Hopping Satellite Signal

跳频通信是对抗各种恶意干扰的一种基本手段,已经被广泛地应用于卫星通信系统。针对宽带高速跳频卫星通信的传输需求,提出了一种跳频卫星通信系统抗干扰增效策略,在跳频通信的基础上进一步提高系统的综合抗干扰性能。通过建立完整的宽带高速跳频卫星通信系统仿真模型,结合高效LDPC码、π/4-DQPSK调制和交织等多种技术进行传输波形的优化仿真设计。理论分析和仿真结果表明,采用该波形且E_b/N_0不低于6.2 d B时,系统抗阻塞干扰能力不低于22 d B。

Frequency hopping communication is a basic means to fight against all kinds of malicious interferences,and has been widely used in satellite communication system. Aiming at the transmission requirement of broadband high-speed frequency hopping satellite communication, a kind of anti-jamming strategy is proposed for frequency hopping satellite communication system, which further improves the performance of the system based on the frequency hopping communication. Through the establishment of a complete broadband high-speed frequency hopping satellite communication system simulation model, combined with efficient LDPC code, π/4- DQPSK modulation, interleaving and other techniques, the optimization of transmission waveform simulation is designed. Theoretical analysis and simulation results show that with the designed waveform and Eh/N0 of not less than 6.2 dB, the system anti-barrage jamming performance is not lower than 22 dB.