Autofocusing the synthetic aperture radar imagery by the fast back-projection algorithm

被引：0
作者：
Zhang, Lei [1 ]
Li, Haolin [1 ]
Xing, Mengdao [1 ]
Bao, Zheng [1 ]
机构：
[1] National Key Lab. of Radar Signal Processing, Xidian Univ.
来源：
Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University | 2014年 / 41卷 / 01期
关键词：
Autofocus; Back-projection; Fast back-projection; Motion compensation; Synthetic aperture radar (SAR);
D O I：
10.3969/j.issn.1001-2400.2014.01.013
中图分类号：
学科分类号：
摘要：
Time-domain Fast Back-Projection (FBP) is an accurate and efficient solver to generate high-resolution Synthetic Aperture Radar (SAR) images. However, motion errors seriously degrade the performance of the FBP image when the accuracy of the position system does not reach the wavelength level. In this paper, we propose a novel multi-aperture map drift (MAMD) algorithm, which is implemented within the FBP iterations. The autofocus processing is realized by estimating the shift of sub-aperture images and it keeps the high accuracy of the FBP algorithm. Experiments by using real airborne SAR data validate the effectiveness of the proposed algorithm.
引用
收藏
页码：69 / 74
页数：5
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