Abstract

多发多收合成孔径雷达(MIMO-SAR)是近年来提出并备受关注的一种新型雷达成像模式,通过多天线同时发射、多天线同时接收的工作方式能够获得远多于实际天线数目的等效观测通道,为解决常规SAR 面临的方位向高分辨率与宽测绘带指标相互矛盾、弱小慢速运动目标难以检测等难题提供了更为有效的技术途径。该文围绕MIMO-SAR 成像技术及其应用展开论述,从距离分辨率增强、3 维下视成像、高分辨率宽测绘带成像以及动目标检测等方面综述了MIMO-SAR 的研究状况,分析了系统的体制优势和不足,进而归纳了MIMO-SAR 研究中的若干关键技术问题,最后对其应用前景进行了展望。

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