MIMO-SAR成像技术发展与展望  

Development and perspective of MIMO-SAR imaging technology

作　　者：庞礴[1,2] 邢世其[1,2] 代大海[1,2] 李永祯[1,2] 王雪松[1] PANG Bo;XING Shiqi;DAI Dahai;LI Yongzhen;WANG Xuesong(College of Electronic Science,National University of Defense Technology,Changsha 410073,China;State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学电子科学学院,湖南长沙410073 [2]国防科技大学电子信息系统复杂电磁环境效应国家重点实验室,湖南长沙410073

出　　处：《系统工程与电子技术》2020年第6期1248-1260,共13页Systems Engineering and Electronics

基　　金：国家自然科学基金(61901499,61625108,61490693);湖南省杰出青年基金(2017JJ1006)资助课题。

摘　　要：作为一种新兴的合成孔径雷达(synthetic aperture radar,SAR)成像体制,近年来提出的多输入多输出SAR(multiple input multiple output SAR,MIMO-SAR)通过波形分集、空间分集等,可以得到远多于实际天线数量的自由度,为突破常规SAR体制局限,实现高分辨率宽测绘带(high resolution wide swath,HRWS)成像、慢速运动目标检测、同时多模式工作等应用提供了有效的技术途径。本文概括了MIMO-SAR的国内外研究现状,剖析了MIMO-SAR的概念内涵、技术特点及关键技术,着重对其波形设计技术进行了探讨。最后,结合系统发展和实际应用,对其发展趋势进行了展望。As an emerging imaging mechanism of synthetic aperture radar(SAR),the recently proposed multiple input multiple output SAR(MIMO-SAR)could obtain much more freedoms than the number of the physical antenna elements by utilizing waveform diversity and space diversity.As a result,it could overcome the limitation of the conventional SAR,and provide effective techniques for applications such as high resolution wide swath(HRWS)imaging,slow moving target detection,mean-time multi-mode operation and so on.This paper summarizes the research status of MIMO-SAR from domestic and abroad,analyzes its concept connotation,technical features and key technologies,and probes into its waveform designing techniques.Finally,combined with system development and practical applications,the developing trend of the MIMO-SAR imaging technique is discussed.

关 键 词：多输入多输出 合成孔径雷达 高分辨率宽测绘带 成像 

分 类 号：TN95[电子电信—信号与信息处理]