论文部分内容阅读
目前航天测控系统中广泛采用的直接序列扩频体制具有抗干扰能力不足、容易被截获的缺点。针对这个问题,设计了一种适用于航天测控的跳频直扩组合扩频信号体制,其最主要的特点是采用跳扩结合的方法提高了信号的抗干扰性能,并且在跳频的同时保持了载波相位的连续性。对所设计波形在各种情况下的抗干扰能力进行了分析,同时给出了在不同干扰下的具体处理方法。从分析可以看出,与直扩体制相比组合扩频体制的抗干扰能力和抗侦破能力都有了明显提高,是提高航天测控系统抗干扰能力的重要途径。
At present, the direct sequence spread spectrum system widely used in space measurement and control system has the disadvantages of insufficient anti-interference capability and easy interception. Aiming at this problem, this paper designs a frequency-hopping spread spectrum spread-spectrum spread spectrum system suitable for space flight measurement and control. The most important feature of this system is that the method of jump-and-spread combining is adopted to improve the anti-jamming performance of the signal and maintain the frequency hopping The carrier phase continuity. The anti-interference ability of the designed waveform under various conditions is analyzed, and the specific processing method under different interferences is given. It can be seen from the analysis that the anti-jamming capability and anti-jamming capability of the combined spread spectrum system have been significantly improved compared with the direct-spread system, which is an important way to improve the anti-interference ability of the space system.