一种新的抗窄带干扰的方法

New method of narrow-band interference suppression

基于变换域的窄带干扰抑制技术是一种极具潜力的抗干扰方法。本文提出了一种基于变换域抗窄带干扰的新方法,利用直扩BPSK调制信号频谱的对称性,用干扰污染谱线对称位置上未被干扰的谱线恢复被污染谱线,从而更精确的重构原信号频谱,达到抗干扰目的。文中称该算法为SS(symmetricalspectrum)算法,详细讨论了算法流程,并进行了数字仿真。该方法结构简单、计算量小,是一种实用的抗干扰方法。

It is a wonderful technique to suppress the narrow-band interference from a direct sequence spread spectrum signal. This paper presents a new transform domain approaches to suppress the narrow-band interference. The method takes full advantages of the direct sequence spread spread spectrum signal, as well as the characteristics of BPSK modulation. It makes use of the spectral symmetry of the PN-BPSK signal to obtain a better estimate of the spectrum. The method is named SS （symmetrical spectrum） in the paper. The detailed process and simulated numeri- cal results were provided. The performance in numerical simulation demonstrates that it is effective and efficient to narrowband interferences.