机载视频合成孔径雷达成像技术研究  

Study of Airborne Video Synthetic Aperture Radar

作　　者：金林[1,2] 吴福伟 杨予昊[1,2] 李大圣[1,2] 孙俊[1,2] JIN Lin;WU Fu-wei;YANG Yu-hao;LI Da-sheng;SUN Jun(The 14th Research Institute of China Electronics Technology Group Corporation,Nanjing 210039,China;Key Laboratory of IntelliSense Technology,CETC,Nanjing 210039,China)

机构地区：[1]中国电子科技集团公司第十四研究所,南京210039 [2]中国电子科技集团公司智能感知技术重点实验室,南京210039

出　　处：《微波学报》2020年第1期45-48,共4页Journal of Microwaves

摘　　要：机载视频合成孔径雷达(ViSAR)工作在太赫兹波段,具有5 Hz以上的无孔径交叠成像帧率。其采用一发四收系统架构,具备合成孔径雷达(SAR)成像、地面动目标检测(GMTI)和干涉合成孔径雷达(InSAR)测高等功能,兼具光学传感器成像速度快以及微波雷达环境与气候适应性好等优势。论文介绍了机载视频合成孔径雷达研究进展,实验表明,其成像分辨率优于0.2 m,合成孔径时间可缩短至0.2 s。利用阴影信息可以对运动目标(如卡车等)进行检测,结合传统的GMTI与InSAR技术,实现对复杂运动目标的成像、跟踪和定位。Airborne video synthetic aperture radar(ViSAR) works at terahertz frequency,whose imaging frame rate with no aperture overlap is more than 5 Hz, so the airborne ViSAR has both the advantages of high imaging speed of optical sensor and superior environmental adaptability of microwave radar. It adopted architectures with one transmitter and four receivers, which endowed the radar with multiple functions, such as synthetic aperture radar(SAR)imaging, ground motive target indication(GMTI) and interferometric synthetic aperture radar(InSAR)altimetry. This paper introduces the study progress of the airborne ViSAR, the experiments show that the resolution of radar is better than 0.2 m, and within the synthetic aperture time of 0.2 s, normal moving targets(such as tank and armored vehicle) only move a short distance, and would leave clear shadows on the ground, which are good for targets detection. Combining traditional GMTI and InSAR technologies, the airborne ViSAR could realize arbitrary moving targets imaging and tracking, and provide precise guidance for weapon systems.

关 键 词：视频合成孔径雷达 太赫兹 地面动目标检测 干涉合成孔径雷达 阴影 

分 类 号：TN957.52[电子电信—信号与信息处理]