多通道SAR-GMTI技术的研究进展

Research Progress in Multichannel SAR-GMTI

基于合成孔径雷达的多通道运动目标检测系统(SAR-GMTI)可以在对地面静止场景进行高分辨率成像的同时完成强杂波环境下的慢速运动目标检测,在军事和民用领域中具有很高的应用价值。首先,简要介绍了多通道SAR-GMTI系统的基本概念,对比了机载与星载、SAR成像与GMTI的同时与分时处理等不同系统的特点,并系统梳理了国内外研究现状;然后,选取分布式SARGMTI系统和基于MIMO的SAR-GMTI系统两个方向进行重点分析;最后,探讨了SAR-GMTI系统的研究重点,并对其发展进行了展望。

The multichannel ground moving target indication system based on the synthetic aperture radar （SAR-GMTI） can obtain high resolution SAR images of stationary scene and detect slowly moving targets in the region with strong clutter interference simultaneously,therefore itplays an important role in military and civil applications. First ly,with regard to multichannel SAR-GMTI,this paper gives a brief introduction to the basic conception,and comparisons between airborne and spaceborne systems,simultaneous processing of SAR imaging with GMTI and time - sharing processing. Afterwards,it systematically presents the ad-vances abroad and domestic. Then two directions are analyzed emphatically which are distributed space borne SAR-GMTI and the SAR-GMTI system based on multiple - input multiple-output（MIMO）. Finally, the research emphasis of SAR-GMTI system is discussed,along with its promising prospect.