跳频卫星通信系统中星上处理方式的性能分析

军事卫星通信系统中,宽带跳频是一种应用广泛的抗干扰手段,有着十分重要的地位。同时由于透明转发器存在“功率掠夺”现象,将星上处理同宽带跳频相结合已成为卫星抗干扰通信系统的发展趋势。但不同的星上处理方案所能获得的抗干扰性能以及星上复杂程度差异很大,对跳频系统的星上处理方式进行了详细的分析,对比了解跳转发、解调转发和译码转发等几种处理方式在全频带干扰下的性能,并给出了分析结果。

Performance Analysis of Different Onboard Processing in Frequency-hop Satellite Communication Systems

In the MILitary SATellite COMmunication (MILSATCOM) systems, wideband Frequency-Hop (FH) techniques plays a more and more important role. At the same time, because of the "power-robbing" effect of a "bent-pipe" repeater, some onboard processing methods are needed to resolve this problem. Combination of FH and onboard processing is becoming an inevitable trend in antijamming MILSATCOM. But the antijamming performance achieved and corresponding complexity vary with the processing method. In this paper, a detailed analysis is made of the three onboard processing methods, namely dehopping-transfer, demodulation-transfer and decoding-transfer. After a comparasion of those methods, a general result is presented.