自适应小波包干扰抑制技术

干扰抑制是提高直接序列（ＤＳ）扩频通信系统抗干扰能力的重要手段。最近人们提出了一种新的干扰抑制技术－基于自适应小波包变换的干扰抑制。该技术利用小波包变换对受到干扰的ＤＳ信号进行分解，使得有用信号和干扰分离，然后滤除干扰分量，最后通过小波包合成恢复扩频信号，其性能在很多情况下优于传统方案。对小波包干扰抑制技术作了综述，指出其优点和有待于解决的问题。

Interference Suppression Technique Based on Adaptive Wavelet Packet Transform

The anti jamming capability of DS/SS communications systems can be enhanced significantly by interference suppression techniques.Recently,a new interference technique based on adaptive wavelet packet transform was proposed.In this technique,jammed DS signal is decomposed using adaptive wavelet packet transform in order to separate desirable signal from jamming signal.The DS signal is recovered by wavelet reconstruction after the jamming signal is filtered out.The new technique outperforms conventional methods in many cases.In this paper,a survey of the technique is presented,and the advantages as well as the problems are pointed out.