依据自适应旁瓣相消原理,着重分析了宽带干扰信号对旁瓣相消性能的影响,针对宽带干扰影响下,主辅天线间的 波程差、主辅天线通道频率特性的不一致性以及主天线旁瓣的频率敏感特性等引起的自适应旁瓣相消系统的主辅天线2 通道信号的去相关作用,采用了主天线通道均衡和子带自适应相消2种方法改善带宽特性,并通过MATLAB仿真验证,仿 真结果表明该两种方法均可明显改善系统的相消性能,达到良好效果。

This paper presents the influence of the wideband interference to sidelobe cancellation performance based on the principle of adaptive sidelobe cancellation, for broadband interference, the delay between main and auxiliary antenna, the frequency sensitivity of the antenna sidelobe and the different between main and auxiliary channel makes the performance of adaptive sidelobe cancellation become deterioration, the main antenna sidelobe equilibrium and subband adaptive cancelling are used to improve the bandwidth characteristics, through the simulate of MATLAB, both the two ways can achieve good results.