基于波前编码的弹载相控阵探测器凝视高分辨成像

为实现前视高分辨成像，新型精确制导弹药需对其搭载的相控探测器成像算法进行研究。提出一种基于波前编码的凝视高分辨成像算法，结合自适应单脉冲响应曲线（MRC）实现前视高分辨探测。利用波前编码形成探测波束非平面波前，以增加瞬时回波信号中所携带目标区域强散射点的有效信息；同时自适应MRC技术为载弹提供方位向的高分辨测角能力，直接利用回波信号动态优化MRC使测角剖面聚焦，并对影响成像精度的因素进行了分析。仿真实验和外场试验结果表明：非平面波前成像误差最大值为2.4 m左右，实际回波信号进行成像处理时方位向与距离向的误差均小于2.5 m，满足载弹实际需求。

High-resolution Staring Imaging of Missile-borne Phased Array Detector Based on Wavefront Coding

The imaging algorithm of the missile-borne phased detector is studied to realize the forward-looking high-resolution imaging of new precision guided munitions. A high-resolution staring imaging algorithm based on wavefront coding is proposed，in which the adaptive monopulse response curve (MRC) is used to realize forward-looking high-resolution detection. The wavefront coding is used to detect the non-planar wavefront of beam，so as to increase the effective information of the strong scattering points in the target area carried by the instantaneous echo signal. Adaptive MRC is used to provide the capability of high-resolution azimuth angle measurement for missile，and MRC is directly optimized by using echo signal to focus the angle measurement section. The factors (such as SNR and random modulation range) affecting imaging accuracy are studied. The simulation experimental and field test results show that the maximun imaging error of non-planar wavefront is 2.4 m，the error of azimuth and distance is less than 2.5 m when using the actual echo signal，which can meet the actual needs of the missile. Key