基于复近似消息传递的前视雷达成像分辨率增强算法

当机载/弹载雷达工作在前视状态时,由于成像场景内不同角度处目标的多普勒差异很小,很难得到 高的角度分辨率。针对海面舰船目标的前视成像应用,利用成像区域具有明显稀疏性的特点,提出一种基于复 近似消息传递压缩感知处理的前视成像角度分辨率增强算法,建立前视成像的线性观测信号模型,给出复近似 消息传递的迭代计算过程,以及多通道雷达前视成像的处理流程。通过仿真数据和 X 波段雷达实测数据的处 理结果验证了该方法的有效性。

Angular Resolution Enhancement Based on Complex Approximated Message Passing for Forward-looking Radar Imaging

Forward looking imaging is an important work mode for airborne radar and missile-borne radar. It can be used to assist aircraft landing in bad weather condition or precision guidance. Aiming at the forward looking imaging application of ship targets at sea, we present a forward looking imaging angle resolution enhancement method based on compressive sensing with complex approximated message passing (CAMP) algorithm. The linear observation signal model of forward-looking imaging is established. The iterative calculation process of CAMP and the processing flow of multi-channel radar forward-looking imaging are presented. The validity of the method is verified by simulation data and processing results of X band radar measured data.