SAR Imaging of Ground Moving Targets with Non-ideal Motion Error Compensation(in English)
Zhou Hui*①② Zhao Feng-jun① Yu Wei-dong① Yang Jian③
①(Space Microwave Remote Sensing System Department, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) ②(University of Chinese Academy of Sciences, Beijing 100049, China) ③(China Academy of Launch Vehicle Technology, Beijing 100076, China)
Conventional ground moving target imaging algorithms mainly focus on the range cell migration correction and the motion parameter estimation of the moving target. However, in real Synthetic Aperture Radar (SAR) data processing, non-ideal motion error compensation is also a critical process, which focuses and has serious impacts on the imaging quality of moving targets. Non-ideal motion error can not be compensated by either the stationary SAR motion error compensation algorithms or the autofocus techniques. In this paper, two sorts of non-ideal motion errors that affect the Doppler centroid of the moving target is analyzed, and a novel non-ideal motion error compensation algorithm is proposed based on the Inertial Navigation System (INS) data and the range walk trajectory. Simulated and real data processing results are provided to demonstrate the effectiveness of the proposed algorithm.
作者简介: Zhou Hui(1983-) was born in Henan, China. He is currently working toward the Ph.D. degree in the Institute of Electronics, Chinese Academy of Sciences, Beijing, China. His current research interests are in SAR/ISAR signal processing, include ground moving target indication, ground moving target imaging, time-frequency analysis, micro-Doppler effect. E-mail: zhouhui-lg@163.com Zhao Feng-jun(1963-) received the M.S. degree from the Graduate University of Chinese Academy of Sciences, Beijing, China, in 1995. Then, he joined the Institute of Electronics, Chinese Academy of Sciences (IECAS), Beijing, China, where he worked on spaceborne/airborne Synthetic Aperture Radar (SAR) system design. He has been the leader of some spaceborne/airborne SAR programs. Currently, he is the Director of the Spaceborne Microwave Remote Sensing System Department, IECAS. His current research interests include spaceborne/airborne SAR system design, ground moving target identification, multichannel SAR signal processing, and circuit design. Yu Wei-dong(1969-) was born in Henan, China. He received the M.S. and Ph.D. degrees in electrical engineering from the Nanjing University of Aeronautics and Aerospace, Nanjing, China, in 1994 and 1997, respectively. He has been with the Institute of Electronics, Chinese Academy of Science (IECAS) since 1997 and became a Professor of communication and information system in 2000. He has been the Chief Designer for several SAR systems and is currently the Deputy Director of the Department of Space Microwave Remote Sensing System, IECAS. His research interests are airborne and spaceborne Synthetic Aperture Radar (SAR) system design and their signal processing. Yang Jian(1986-) was born in Liaoning, China. He received the B.S. degree in communication engineering from Harbin Engineering University, and the Ph.D. degree from the Institute of Electronics, Chinese Academy of Sciences, Beijing, China, in 2013. He is currently an assistant researcher with China Academy of Launch Vehicle Technology, Beijing, China. His current research interests include ground moving target indication, ground moving target imaging, frequency-modulated continuous wave synthetic aperture radar signal processing, and motion compensation.
引用本文:
周 辉, 赵凤军, 禹卫东, 杨 健. 基于非理想运动误差补偿的SAR地面运动目标成像(英文)[J]. 雷达学报, 2015, 4(3): 265-275.
Zhou Hui, Zhao Feng-jun, Yu Wei-dong, Yang Jian. SAR Imaging of Ground Moving Targets with Non-ideal Motion Error Compensation(in English). JOURNAL OF RADARS, 2015, 4(3): 265-275.
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