FOCUSING OF SPACEBORNE SAR DATA USING THE IMPROVED NONLINEAR CHIRP SCALING ALGORITHM

被引：5
|
作者：
Tang, Wanru [1 ]
Huang, Bang [1 ]
Zhang, Shunsheng [2 ]
Wang, WenQin [1 ]
Liu, Wenbo [1 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Commun & Informat Engn, Chengdu 611731, Peoples R China
[2] Univ Elect Sci & Technol China, Res Inst Elect Sci & Technol, Chengdu 611731, Peoples R China
来源：
IGARSS 2020 - 2020 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM | 2020年
关键词：
Bistatic SAR; chirp scaling; improved nonlinear chirp scaling; NLCS; perturbation;
D O I：
10.1109/IGARSS39084.2020.9323674
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
Spaceborne bistatic synthetic aperture radar (BiSAR) system with geosynchronous-earth-orbit (GEO) transmitter and a low-earth-orbit (LEO) receiver has many advantages which are fine resolution, higher signal-to-noise (SNR), shortest revisit cycle. However, BiSAR data are often azimuth variant because of the sum of two hyperbolic range equation which bring technical challenges to image focus. We address an improved nonlinear chirp scaling (NLCS) algorithm in this paper. The key is introduced a cubic perturbation function in the azimuth domain and used an modified NLCS algorithm to complete azimuth compression, the method of series of reversion (MSR) to obtain an accurate signal spectrum. Simulation results shows the effective of our proposed method.
引用
收藏
页码：6555 / 6558
页数：4
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