Nonlinear RCMC method for spaceborne/airborne forward-looking bistatic SAR

被引：4

作者：

Liu, Zhe ^{[1
]}

Yang, Jianyu ^{[1
]}

Zhang, Xiaoling ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Elect Engn, Chengdu 611731, Peoples R China

来源：

JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS | 2012年 / 23卷 / 02期

基金：

中国国家自然科学基金;

关键词：

forward-looking bistatic synthetic aperture radar (FBSAR); nonlinear range cell migration compensation(RCMC); imaging;

D O I：

10.1109/JSEE.2012.00026

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In the spaceborne/airborne forward-looking bistatic synthetic aperture radar (SA-FBSAR), due to the system platforms' remarkable velocity difference and the forward-looking mode, the range cell migration (RCM) not only depends on the target's two-dimensional location, but also varies with the range location nonlinearly. And the nonlinearity is not just the slight deviation from the linear part, but exhibits evident nonlinear departure in the RCM trajectory. If the RCM is not properly corrected, nonlinear image distortions would occur. Based on the RCM model, a modified two-step RCM compensation (RCMC) method for SA-FBSAR is proposed. In this method, firstly the azimuth-dependent RCM is compensated by the scaling Fourier transform and the phase multiplication. And then the range-dependent RCM is removed through interpolation. The effectiveness of the proposed RCMC method is verified by the simulation results of both point scatterers and area targets.

引用

页码：201 / 207

页数：7

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