New analytical imaging algorithm for general case airborne bistatic SAR

被引：1
|
作者：
Zhang, Jianyun [1 ]
Ran, Jinhe [1 ]
Wu, Yongjun [1 ]
机构：
[1] Inst Elect Engn, Hefei 230037, Peoples R China
来源：
JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS | 2014年 / 25卷 / 05期
关键词：
track decoupling; scaling factor; general case (GC); bistatic synthetic aperture radar (SAR); imaging algorithm;
D O I：
10.1109/JSEE.2014.00091
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper focuses on the general case (GC) airborne bistatic synthetic aperture radar (SAR) data processing, and a new analytical imaging algorithm based on the extended Loffeld's bistatic formula (ELBF) is proposed. According to the bistatic SAR geometry, the track decoupling formulas that convert the bistatic geometry to the receiver-referenced geometry in a concise way are derived firstly. Then phase terms of ELBF are decomposed into two independent phase terms as the range phase term and the azimuth phase term in a new way. To get the focusing result, the bistatic deformation (BD) term is compensated in the two-dimensional (2-D) frequency domain, and the space-variances of the range phase term and the azimuth phase term are eliminated by chirp scaling (CS) and chirp z-transform (CZT), respectively. The effectiveness of the proposed algorithm is verified by the simulation results.
引用
收藏
页码：786 / 793
页数：8
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