超高分辨率星载多发多收滑动聚束SAR成像

doi:10.3969/j.issn.1001-2400.2015.06.023

J4 ›› 2015, Vol. 42 ›› Issue (6): 131-137.doi: 10.3969/j.issn.1001-2400.2015.06.023

超高分辨率星载多发多收滑动聚束SAR成像

吴元;孙光才;杨军;邢孟道

(西安电子科技大学雷达信号处理国家重点实验室，陕西西安 710071)

收稿日期:2014-09-14 出版日期:2015-12-20 发布日期:2016-01-25
通讯作者: 吴元
作者简介:吴元(1987-)，男，西安电子科技大学博士研究生，E-mail: wuyuaner@126.com．
基金资助:
国家自然科学基金资助项目(61301292)

Super high-resolution spaceborne multiple-transit and multiple-receive sliding spotlight SAR imaging

WU Yuan;SUN Guangcai;YANG Jun;XING Mengdao

(National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an 710071, China)

Received:2014-09-14 Online:2015-12-20 Published:2016-01-25
Contact: WU Yuan

摘要/Abstract

摘要：

在大场景超高分辨率星载多发多收滑动聚束合成孔径雷达中，星载弯曲轨道不能近似为直线模型，传统基于直线模型的成像方法不再适用．针对此问题提出一种超高分辨率速度变标算法，以适应大场景超高分辨率的需要．另外，在子带拼接时，由于相邻子带间的频谱混叠会产生较高的虚像，针对此问题提出一种优化的线性调频信号发射波形，可以明显降低虚像水平．

关键词: 滑动聚束合成孔径雷达, 多发多收, 超高分辨率, 大场景

Abstract:

In the Wide-field Super High-resolution Spaceborne Multiple-transit and multiple-receive Sliding Spotlight SAR, the line-of-sight approximation of the curved orbit is not established, so traditional imaging algorithms based on line-of-sight approximation is no longer available. For this problem, a super high-resolution velocity scaling algorithm(SHRVS) is proposed to meet the need of wide-field and super high-resolution. Besides, in the procedure of sub-band assembling, a high level virtual image appears due to the frequency aliasing of adjacent sub-bands. For this problem, an optimized linear FM transmit waveform is proposed, which can depress the virtual image level greatly.

Key words: sliding spotlight synthetic aperture radar, multiple-transit and multiple-receive, super high-resolution, wide-field

吴元;孙光才;杨军;邢孟道. 超高分辨率星载多发多收滑动聚束SAR成像[J]. J4, 2015, 42(6): 131-137.

WU Yuan;SUN Guangcai;YANG Jun;XING Mengdao. Super high-resolution spaceborne multiple-transit and multiple-receive sliding spotlight SAR imaging[J]. J4, 2015, 42(6): 131-137.

参考文献

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[1]	杨军,周芳. 分布式小卫星MIMO-SAR超高分辨成像方法[J]. 西安电子科技大学学报, 2021, 48(2): 99-108.
[2]	景国彬,李宁,孙光才,邢孟道. 联合误差估计的机载超高分辨率SAR成像[J]. 西安电子科技大学学报, 2019, 46(3): 1-7.

超高分辨率星载多发多收滑动聚束SAR成像

Super high-resolution spaceborne multiple-transit and multiple-receive sliding spotlight SAR imaging

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