2-D Spatial Variation Bistatic Forward-Looking SAR Imagery

被引：0
|
作者：
Lu, Jingyue [1 ]
Wang, Xuhua [1 ]
Ma, Yan [2 ]
Zhang, Lei [3 ]
Cao, Yunhe [4 ]
机构：
[1] Xidian Univ, Sch Comp Sci & Technol, Xian 710071, Peoples R China
[2] Beijing Inst Tracking Telemetry & Telecommun, Beijing 100076, Peoples R China
[3] Sun Yat Sen Univ, Sch Elect & Commun Engn, Guangzhou 510275, Peoples R China
[4] Xidian Univ, Natl Lab Radar Signal Proc, Xian 710071, Peoples R China
来源：
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2022年 / 19卷
关键词：
Radar; Chirp; Transmitters; Imaging; Synthetic aperture radar; Receivers; Azimuth; 2-D spatial variation; bistatic forward-looking synthetic aperture radar (BFSAR); dechirping; keystone transform; subaperture;
D O I：
10.1109/LGRS.2022.3148191
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Under the special geometric model of bistatic forward-looking synthetic aperture radar (SAR), the 2-D spatial variation problem makes it difficult for traditional algorithms to achieve well-focused imaging, which limits the imaging area. In this letter, from the perspective of range-azimuth decoupling of signal, dechirping processing and keystone transform are used to realize range-variant phase compensation and range cell migrations (RCMs) correction. Based on the range-azimuth decoupled signal, the overlapped subaperture processing can eliminate the azimuth-variant quadratic chirp rate phase in each range cell. Experimental results demonstrate that the proposed method is suitable for the bistatic forward-looking SAR (BFSAR) system to solve the 2-D spatial variation problem and achieve well-focused imaging.
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页数：5
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