扩频通信中大功率窄带干扰抑制的一种频域自适应算法

A Spectrum Domain Adaptive Filtering Algorithm for Large NBI Suppression in Spread Spectrum Communications

基于扩频信号与大功率的窄带干扰在功率谱密度上的显著差异，本文提出了一种带反馈的频域自适应虎法，它能够在多个大功率ＮＢＩ同时存在的情形下稳定工作且使信噪比得到理想的改善。文中给出了具体的数学推导及计算机仿真结果，验证了算法的有效性。

On the basis of the difference of power spectrum density (PSD) between narrow band interference (NBI) and useful signal, this paper investigates the use of a spectrum domain adaptive filtering algorithm with feedback to overcome the defects of the time domain adaptive FIR filtering, which suffers from the increase both in number and JSR of NBI. Mathematical derivation as well as computer simulation results are presented to verify the validity of the proposed algorithm.