摘要
针对航天器扩频体制测控链路中无源互调(PIM)干扰的问题,提出了一种基于小波包分解的全盲PIM抑制算法。该算法将接收的扩频测控信号进行小波包多层分解,根据分解后的信号应满足高斯分布的特性,完成对干扰进行抑制,而整个处理过程不涉及干扰门限的设置,是一种全盲的PIM干扰抑制方法。Matlab仿真表明,采用该抗干扰算法可将信干比提高7dB。
Focusing on the passive inter-modulation （PIM） problem in spread spectrum scheme TT＆C link, a wavelet packet decomposition based full-blind PIM suppression algorithm was proposed. Multi-layers wavelet packet decomposition was employed on the received spread spectrum TT＆C signals, according to the characteristic the decomposed signal should obey Gaussian distribution, and interference suppression was achieved, No suppression gate was set during the whole process and this was a full-blind PIM suppressed algorithm. Finally, Matlab simulation result shows that 7dB signal interference ratio gain can be obtained.
出处
《中国空间科学技术》
EI
CSCD
北大核心
2016年第4期47-50,共4页
Chinese Space Science and Technology
关键词
测控链路
扩频通信
无源互调
小波包
干扰抑制
TT＆C link
spread spectrum
passive inter--modulation
wavelet packet
interference suppression
