多角度SAR动目标检测技术及其高分三号实验验证研究  

Multi-aspect SAR-GMTI and Experimental Research on Gaofen-3 SAR Modes

作　　者：申文杰 韩冰 林赟[4] 胡玉新 洪文 SHEN Wenjie;HAN Bing;LIN Yun;HU Yuxin;HONG Wen(Aerospace Information Research Institute,Chinese Academy of Science,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Technology in Geo-spatial Information Processing and Application System,Beijing 100190,China;North China University of Technology,Beijing 100144,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100190 [2]中国科学院大学,北京100049 [3]中国科学院空间信息处理与应用系统技术重点实验室,北京100190 [4]北方工业大学,北京100144

出　　处：《雷达学报（中英文）》2020年第2期304-320,共17页Journal of Radars

基　　金：国家自然科学基金(61571421,61431018)。

摘　　要：多角度SAR作为一种新的SAR模式,它具备对场景的长时间观测以及大合成孔径角两个优势。已有研究表明,这两点区别于传统SAR模式的优势,使得单通道系统也可以具备较强的动目标检测能力,即,无需增加雷达系统的复杂度,就可以实现在轨星载SAR系统动目标检测能力的拓展和提升。这也使得多角度SAR动目标研究成为新的研究热点。在研讨近年来多角度SAR-GMTI研究基础及发展现状的基础上,该文重点介绍了研究团队围绕高分3号开展的原理性验证实验研究,包括凝视聚束模式动目标检测方法研究、双通道动目实验模式、双通道凝视聚束GMTI模式研究等。通过上述研究,以期为在轨及规划星载SAR单通道GMTI工程实现、未来星载多角度SAR时序动态观测新型工作模式设计等奠定可行性研究基础。Multi-aspect SAR is a new SAR mode that has two advantages, i.e., long-term observations and a large synthetic-aperture azimuth angle. Previous studies have reported that these unique advantages enable even single-channel systems to have a relatively strong capability for detecting moving targets, i.e., multi-aspect SAR expands and improves the moving-target-related capabilities of the earlier SAR satellite system without increasing its complexity. As such, multi-aspect SAR-GMTI has become a trending topic for research. After reviewing the recent progress and research basis of multi-aspect SAR-GMTI, in this paper, we present our research on the Gaofen-3 SAR, which includes: moving-target detection methods that use the staring spotlight mode, dual-channels GMTI mode, and the dual-channel spotlight GMTI mode. With the results obtained by this research, we hope to establish a basis for the engineering implementation of current and future spaceborne single-channel SAR-GMTI modes and the design of a future spaceborne multi-aspect SAR mode capable of retrieving time-series and dynamic scene information.

关 键 词：多角度SAR 地面动目标指示 高分3号 凝视聚束模式 双通道实验模式 

分 类 号：TN957[电子电信—信号与信息处理]