一种直扩通信系统窄带干扰变换域抑制方法

本文提出一种基于AR模型谱估计和变换域处理相结合的直接序列扩频（DS-SS）通信系统窄带干扰抑制方法。该方法采用AR模型估计信号的频谱,并由此构造频域窄带干扰抑制滤波器。由于谱估计的同时也估计了最小误差功率,这为频域抑制滤波器的门限提供了参考,从而实现了自动门限设置。与时域AR预测型窄带干扰抑制方法相比,频域处理利用FFT实现了并行处理,提高了处理速度。

A Transform Domain Technique for Suppressing Narrowband Interference in DS-SS System

This paper proposes a method for narrowband interference suppression in Direct Sequence Spread System(DS-SS). The method first estimates the spectrum of the input signal using AR model, then uses the estimated spectrum to design the transform domain narrowband interference filter. For we can get the average prediction error at the same time, it is used as the threshold reference in designing the notch filter. Because accomplished by FFT, this method is parallel and faster than the time domain AR prediction-error narrowband interference filter.