Full aperture imaging algorithm for highly squinted TOPS SAR

被引：3
|
作者：
Zhang, Sheng [1 ,2 ]
Sun, Guangcai [1 ,2 ]
Xing, Mengdao [1 ,2 ]
机构：
[1] Xidian Univ, Natl Lab Radar Signal Proc, Xian 710071, Peoples R China
[2] Xidian Univ, Collaborat Innovat Ctr Informat Sensing & Underst, Xian 710071, Peoples R China
来源：
JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS | 2016年 / 27卷 / 06期
基金：
中国国家自然科学基金;
关键词：
squinted terrain observation by progressive scans (TOPS) synthetic aperture radar (SAR); azimuth preprocessing; spectral analysis (SPECAN); deramping;
D O I：
10.21629/JSEE.2016.06.05
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Aiming at solving the azimuth signal aliasing problem in the Doppler domain, the azimuth time aliasing problem after range cell migration correction (RCMC) and the severe range and the azimuth coupling problem in both the phase and envelope for highly squinted terrain observation by progressive scans (TOPS) synthetic aperture radar (SAR), a novel full aperture imaging algorithm is presented. An unaliased two-dimensional (2-D) spectrum is first obtained by the azimuth preprocessing; the modified range migration algorithm (RMA) is then used to complete RCMC; and finally the azimuth signal is focused in the Doppler domain by spectral analysis (SPECAN) and deramping. Simulations and real data processing results validate the effectiveness of the proposed algorithm.
引用
收藏
页码：1168 / 1175
页数：8
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