Coherence-Improving Algorithm for Image Pairs of Bistatic SARs With Nonparallel Trajectories

被引：8

作者：

Lv, Xiaolei ^{[1
]}

Xing, Mengdao ^{[1
]}

Deng, Yunkai ^{[2
]}

Zhang, Shouhong ^{[1
]}

Wu, Yirong ^{[2
]}

机构：

[1] Xidian Univ, Natl Key Lab Radar Signal Proc, Xian 710071, Peoples R China

[2] Chinese Acad Sci, Inst Elect, Beijing 100080, Peoples R China

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2009年 / 47卷 / 08期

基金：

中国国家自然科学基金;

关键词：

2-D prefilter; bistatic SAR; coherence; ground moving target indication (GMTI); image registration; synthetic aperture radar (SAR); TARGET DETECTION;

D O I：

10.1109/TGRS.2009.2018532

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

070403 [天体物理学]; 070902 [地球化学];

摘要：

Ground moving target indication (GMTI) is one of the most important applications in a general bistatic synthetic aperture radar (SAR) system, where the transmitter and receiver move along nonparallel trajectories with different velocities. In order to improve the capability of clutter cancellation in bistatic SAR/GMTI processing, the coherence between two echoes collected by two receivers is investigated, and the full-coherence conditions are derived. A new coherence-improving algorithm for general bistatic SAR complex image pairs is proposed, which can be realized in the following steps: 2-D range azimuth prefiltering processing, relative geometric deformation correction, and image registration. An approximate implementation of 2-D prefiltering and the corresponding prefilter parameter analysis are also given. Last, two numerical experiment results are given to demonstrate the effectiveness of the proposed algorithm.

引用

页码：2884 / 2898

页数：15

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