角反射器干扰是主动式雷达导引头所面临的常见无源干扰, 因此, 抗角反射器干扰方法是反辐射导弹主动雷达导引头能否精确打击目标的重要支撑技术。采用波形选择方法实现雷达导引头抗角反射器干扰, 首先简要分析了角反射器的雷达特性, 随后, 提出信息距离最大化准则作为波形选择依据。该准则原理：在雷达发射线性调频信号、步进-线性调频信号、双相移相键控信号情况下, 以被打击目标与角反射器高分辨一维距离像的信息距离最大为优化函数, 选择三种信号中的一种, 实现目标与角反射器的有效区分, 从而对抗角反射器干扰。仿真结果表明了算法的有效性。

Corner reflector interference is a common passive interference faced by active radar seeker. Therefore, the anti interference method is an important supporting technology for active radar seeker of anti radiation missile to precisely attack the target. A waveform selection based method is proposed for radar seeker to counter the corner reflector interference. Firstly, a brief analysis is made of the radar characteristics of corner reflector, and then a criterion of maximum information distance is proposed as the criterion for waveform selection. The principle is as follows: in the case that radar launches LFM (Linear Frequency Modulation) signal, SF LFM (Stepped Frequency Linear Frequency Modulation) signal and BPSK (Binary Phase Shift Keying) signal, take the maximum information distance between the attacked target and one dimension high resolution range profile of the corner reflector as the optimal function, select one of the three signals to distinguish the target and corner reflector, thus to realize anti corner reflector interference. Simulation results show that the proposed algorithm has good performance.