自适应旁瓣对消系统中的通道均衡技术

Channel Equalization of the ASLC

自适应旁瓣对消(ASLC)是雷达抗有源干扰的有效方法。它采用空间滤波技术,通过辅助接收通道在干扰方向形成波束图的零点,实现对干扰信号的抑制。但是通道间频率特性失配使主、辅通道信号产生去相关作用,导致对消性能大大下降,在通道中插入FIR均衡器,可以补偿各通道之间的失配,使对消比有较大幅度的提高。

Adaptive side-lobe canceling （ASLC） is an effective method of radar anti-active jamming. Beam pattern null in the direction of jamming is formed by space filtering and the assisted receive channels to suppress the jamming. In the ASLC system, the frequency mismatch between channels results in de- correlation between the main channel and auxiliary one, which makes the cancellation performance degrade greatly. By inserting the FIR equalizer, the mismatch between various channels can be compensated. This scheme can be used for improving the cancellation ratio effectively.