主瓣掩护式干扰下单脉冲雷达目标检测方法

针对单脉冲雷达在目标与干扰视线夹角变小时抗干扰性能显著下降的问题，提出了一种基于分布式辅助天线的改进型单脉冲雷达抗主瓣掩护式干扰方法。对雷达系统添加分布式辅助天线，以抗干扰改善因子最大化为准则，综合运用单脉冲雷达的和、差波束及分布式辅助天线波束在波束域进行自适应干扰抑制，最后利用恒虚警检测验证所提算法的抗干扰性能，并与其他方法进行了对比。数值仿真验证了所提抗干扰方法可有效提升抗干扰改善因子及目标检测概率，当目标、干扰视线夹角较小时亦具备较好的抗干扰性能。

A Target Detection Method for Monopulse Radar under Condition of Main Lobe Cover Interference

Aimed at the problems that as the angle between the target and the jamming line of sight decreases, the anti-jamming performance of monopulse radar decreases noticeably, this paper proposes an improved anti-jamming method of monopulse radar based on distributed auxiliary antenna. Distributed auxiliary antennas are added in the radar system, the maximization of anti-interference improvement factors must be taken as a guideline, and integrated single-pulse radar beams and distributed auxiliary antenna beams are utilized for performing adaptive interference suppression in the beam domain. Finally, CFAR detection is used to verify the anti-interference performance of the proposed algorithm, in comparison with other methods. The numerical simulation results show that the proposed anti-jamming method can effectively improve the anti-jamming improvement factor and target detection probability, and has a good anti-jamming performance while the target and interference line of sight are at a small angle.