An Improved Range Model and Omega-K-Based Imaging Algorithm for High-Squint SAR With Curved Trajectory and Constant Acceleration

被引：37
|
作者：
Li, Zhenyu [1 ]
Liang, Yi [1 ]
Xing, Mengdao [1 ]
Huai, Yuanyuan [1 ]
Gao, Yuexin [1 ]
Zeng, Letian [1 ]
Bao, Zheng [1 ]
机构：
[1] Xidian Univ, Natl Lab Radar Signal Proc, Xian 710071, Peoples R China
来源：
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2016年 / 13卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Acceleration; curved trajectory; high-squint synthetic aperture radar (SAR); hyperbolic range model (HRM); omega-K;
D O I：
10.1109/LGRS.2016.2533631
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
For high-squint synthetic aperture radar (SAR) with curved trajectory, the traditional hyperbolic range model (HRM) is inaccurate, and the variation of velocity caused by constant acceleration in azimuth dimension cannot be ignored. Thus, the traditional omega-K imaging algorithms based on HRM are no longer available. For this problem, this letter proposes an improved range model, which can precisely take account for the curved trajectory. Then, a modified omega-K algorithm based on this new range model is proposed for high-squint SAR imaging. Simulation results validate the effectiveness of the improved range model and imaging algorithm.
引用
收藏
页码：656 / 660
页数：5
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