采用变换域自适应技术抑制DS扩频通信中的窄带干扰

Adapted Technology for DS Spread Spectrum Receivers which Employ Modulated Lapped Transform to Excise Interference

为了去除DS扩频系统的窄带干扰,本文提出利用调制重叠变换(MLT)把接收信号映射到变换域,然后应用变换域自适应滤波技术进行抗干扰处理,计算机仿真结果表明该算法可取得对抗干扰很大的阻带衰减,并且系统性能不随干扰频率和干扰带宽的变化而变化,而且能实时实现,本中讨论了实现时应注意的问题,可以预见MLT很有希望取代传统的块变换。

In this paper, it is shown that the performance of a direct spectrum （DS/SS） receiver which incorporates modulated lapped transform （MLT） to excise narrowband interference is better than block transform and can be implemented in the hardware in real time. MLT can be considered as a worthy transform in application.