Abstract：Multi-channel in azimuth is a technique to achieve high-resolution as well as wide-swath in Synthetic Aperture Radar (SAR) systems. Channel error is inevitable in multi-channel systems and it induces blurring in subsequent SAR imagery. Existing compensation approaches are sensitive to system parameters as well as the imaging scenes. Uncertainty of the parameters impacts the validation of these algorithms. In this paper, an improved approach is presented to remove the channel error. Based on the error form, this approach models channel error as three parts: the range gain error, the pulse sampling clock error, and the transmission phase error. The range gain error and the pulse sampling clock error are removed alternately. Then the proposed approach uses cost function to estimate the transmission phase error so that it is independent from the imaging scene. Point target simulations are carried out to investigate the performance, and real data comparison experiments are carried out to verify this approach.
Supported by the National Natural Science Foundation of China (No. 61172122, 61422113).
作者简介: Zhang Lei was born in Jilin, China in 1985. He received her Ph.D. degree
from the Institute of Electronics, Chinese Academy of Sciences in 2014.
He is currently an assistant research fellow with the Institute of Electronics, Chinese Academy of Sciences. His research interests are signal process of high resolution SAR. E-mail: 314forever@163.com
Deng Yun-kai was born in 1962. Professor, Ph.D. supervisor, major research in spaceborne SAR design. E-mail: ykdeng@mail.ie.ac.cn
Robert Wang was born in 1980. He is now a Research Fellow and Ph.D. supervisor of Institute of Electronics, Chinese Academy of Science, he is a
Senior Member of IEEE. His main research interest is Bistotic SAR (BiSAR) and signal processing of FMCW SAR. E-mail: yuwang@mail.ie.ac.cn
Zheng Shi-chao was born in Rizhao, China in 1986, Ph.D. candidate, major
research in signal process of wide area monitoring radar. E-mail: jerryiszsc@163.com
Yang Liang was born in Yantai, China in 1984, Ph.D. candidate, major research in SAR raw data simulation. E-mail: yangliang_mail@163.com
引用本文:
张 磊, 邓云凯, 王 宇, 郑世超, 杨 亮. 基于代价函数的通道误差校正方法(英文)[J]. 雷达学报, 2014, 3(5): 556-564.
Zhang Lei, Deng Yun-kai, Wang Yu, Zheng Shi-chao, Yang Liang. Channel Error Compensation for Multi-channel SAR Based on Cost Function(in English). JOURNAL OF RADARS, 2014, 3(5): 556-564.
