末制导合成孔径雷达信号分析及成像处理

研究了末制导合成孔径雷达（synthetic aperture radar, SAR）宽波束高分辨率成像问题，提出一种基于频谱分析的算法。将初始距离相同的目标作为多普勒分辨的处理对象，建立成像几何模型，分析了回波相位、方位分辨率、距离徙动。将波束照射区域分为若干方位角带，针对每一方位角带，采用相应参数进行距离徙动校正、二次相位补偿和频谱分析，根据各处理结果，合成波束照射区域内所有目标的高分辨率图像。给出了算法流程，仿真实验验证了算法的有效性。

Signal analysis and imaging processing of terminal guidance synthetic aperture radar

This paper studies at the wide-beam and high resolution imaging problem of the terminal guidance synthetic aperture radar (SAR), and an algorithm based on spectral analysis is proposed. Targets in the same initial range are taken as the objects of Doppler frequency analysis, and then the imaging geometric model is established. The echo signal phase, azimuth resolution and range cell migration are analyzed. The illuminated area is divided into several azimuth bands, and range cell migration correction, quadratic phase compensation and spectral analysis are done with corresponding parameter for each. A high resolution image of targets in the illuminated area is formed from the output of each processing. The whole flow of the algorithm is given. Simulations corroborate the validity of the algorithm.