作战雷达发射假目标干扰信号优化匹配仿真

Optimal Matching Simulation of Jamming Signal for Firing Radar Targets

针对线性调频脉冲压缩雷达具有强抗干扰能力的特点,传统的固定式移频干扰会在延时和频移之间存在耦合作用,使附有频移的回波信号经过匹配滤波处理后主峰展宽,幅度按三角包络下降,干扰功率出现失配损失等难点,提出了两种多假目标干扰样式——准移频重复转发和准移频密集假目标干扰,以重复转发和密集复制的方式在真目标附近产生更加密集的假目标,可对真目标进行有效干扰。通过Matlab仿真验证,结果表明两种干扰样式同时兼有压制性干扰和欺骗性干扰的双重效果,可以达到对线性调频雷达进行有效干扰的目的。

ABSTRACT：Aiming at the strong anti-jamming ability of LFM pulse compression radar, the traditional fixed fre- quency-shifting interference may have the coupling effect between delay and frequency shift, so that the echo signal with frequency shift may be processed by matched filter, which can widen the main peak, reduce the amplitude with triangular envelope, and mismatch the interference power. In this paper, two multi-fake target interference patterns, the repeated retransmission and dense replication, are proposed. The false targets in vicinity of true target can be gen- erated, and the true target can be effectively disturbed. The result of Matlab simulation shows that the two interfer- ence patterns have the dual effect of suppressing jamming and deceptive jamming, and can interfere with the linear frequency modulation radar effectively.