基于Bakhshali近似的星载双站SAR成像方法

doi:10.7523/j.issn.2095-6134.2017.06.012

中国科学院大学学报 ›› 2017, Vol. 34 ›› Issue (6): 751-758.DOI: 10.7523/j.issn.2095-6134.2017.06.012

基于Bakhshali近似的星载双站SAR成像方法

袁基力^1,2,3, 吕孝雷^1,2, 林建和^1,2,3

1. 中国科学院电子学研究所, 北京 100190;
2. 中国科学院空间信息处理与应用系统技术重点实验室, 北京 100190;
3. 中国科学院大学, 北京 100049

收稿日期:2016-12-21 修回日期:2017-02-27 发布日期:2017-11-15
通讯作者: 袁基力
基金资助:
中国科学院"百人计划"项目（Y53Z180390）和民政部国家减灾中心项目（8435-01）资助

Spaceborne bistatic SAR imaging method based on Bakhshali approximation

YUAN Jili^1,2,3, LÜ Xiaolei^1,2, LIN Jianhe^1,2,3

1 Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
2 Key Laboratory of Spatial Information Processing and Application System Technology, Chinese Academy of Sciences, Beijing 100190, China;
3 University of Chinese Academy of Sciences, Beijing 100049, China

Received:2016-12-21 Revised:2017-02-27 Published:2017-11-15

摘要/Abstract

摘要： 随着卫星技术的发展与成熟，星载分布式SAR和中高轨SAR越来越受到关注，但是其较长的合成孔径时间和大基线距对双站SAR成像提出了新的要求。基于单站等效思路，提出一种基于Bakhshali近似的双曲等效方法，设计了适用于该方法的CS成像流程。与基于泰勒二阶近似的双曲等效方法相比，该方法满足长合成孔径时间和基线距变化较大的情况下的成像要求。最后通过星载双站SAR的仿真实验验证了该方法的有效性。

关键词: Bakhshali近似, 星载双站SAR, 改进的双曲等效方法, CS算法

Abstract: Distributed spaceborne SAR and medium-or high-orbit SAR are receiving increasing focus with the development of satellite technology, while the extended synthetic aperture length and long baseline pose new challenges to the bistatic SAR imaging. In this work we propose a new hyperbolic equivalence method based on Bakhshali approximation. Besides, an appropriate CS imaging procedure is designed. Compared to the original method, the proposed method meets the requirements. Finally, the simulation results verify the validity of the proposed method.

Key words: Bakhshali approximation, spaceborne bistatic SAR, advanced hyperbolic approximation, CS algorithm

中图分类号:

TN957

袁基力, 吕孝雷, 林建和. 基于Bakhshali近似的星载双站SAR成像方法[J]. 中国科学院大学学报, 2017, 34(6): 751-758.

YUAN Jili, LÜ Xiaolei, LIN Jianhe. Spaceborne bistatic SAR imaging method based on Bakhshali approximation[J]. , 2017, 34(6): 751-758.

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基于Bakhshali近似的星载双站SAR成像方法

Spaceborne bistatic SAR imaging method based on Bakhshali approximation

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