多发多收SAR波形设计与高分辨成像技术综述

多发多收合成孔径雷达(multi input multi output synthetic aperture radar, MIMO SAR)作为一种新雷达体制,通过多天线的收发可以获得比实际收发天线数目多的等效观测通道,相比传统SAR体制的约束,MIMO SAR在实现高分辨率宽测绘带遥感、慢速运动目标检测、三维成像等方面具有很大优势。该文对近年来MIMO SAR波形设计与高分辨成像技术的国内外研究现状进行了综述,重点总结了正交波形设计、方位向无模糊成像和提高距离向分辨率3个关键技术,最后指出了MIMO-SAR波形设计与成像技术在未来发展中需重点解决和关注的若干问题。

Review of multi-input multi-output SAR waveform design and high resolution imaging

Multi input multi output synthetic aperture radar (MIMO SAR), a new kind of radar regime, could obtain more equivalent observation channels than the number of the physical antennas by utilizing multiple transmitting and receiving antennas. Compare with traditional SAR regime, MIMO SAR has significant potential on high resolution wide swath remote sensing, detection of slowly moving targets and three dimensional imaging, etc. An overview of the overseas and domestic research status on MIMO SAR waveform design and high resolution imaging techniques is presented in this paper. Key technologies including optimal orthogonal waveform design, azimuth imaging without ambiguity and enhancing range resolution, are discussed. Finally, some key issues to enhance the imaging performance of MIMO SAR are introduced which deserve more attention in the future.