Improved chirp scaling algorithm for parallel-track bistatic SAR

被引：0
|
作者：
Li Feng [1 ,2 ]
Li Shu [3 ]
Zhao Yigong [1 ]
机构：
[1] Xidian Univ, Sch Elect Engn, Xian 710071, Peoples R China
[2] Zhejiang Univ, Dept Informat Sci & Elect Engn, Hangzhou 310058, Zhejiang, Peoples R China
[3] EAAF Equipment Inst Land Based Air Def, Beijing 100085, Peoples R China
来源：
JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS | 2009年 / 20卷 / 02期
基金：
中国国家自然科学基金;
关键词：
bistatic synthetic aperture radar; chirp scaling; range walk; curvature factor; parallel track;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
The curvature factor of the parallel-track bistatic SAR is range dependent, even without variation of the effective velocity. Accounting for this new characteristic, a parallel-track chirp scaling algorithm (CSA) is derived, by introducing the method of removal of range walk (RRW) in the time domain. Using the RRW before the CSA, this method can reduce the varying range of the curvature factor, without increasing the computation load obviously. The azimuth dependence of the azimuth-FM rate, resulting from the RRW, is compensated by the nonlinear chirp scaling factor. Therefore, the algorithm is extended into stripmap imaging. The realization of the method is presented and is verified by the simulation results.
引用
收藏
页码：291 / 296
页数：6
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