多通道高分辨率宽测绘带SAR系统杂波抑制技术研究

侯丽丽; 郑明洁; 宋红军; 祁丽娟

doi:10.11999/JEIT150659

多通道高分辨率宽测绘带SAR系统杂波抑制技术研究

doi: 10.11999/JEIT150659

2.
(中国科学院电子学研究所北京 100190) ②(中国科学院大学北京 100190)

基金项目:

国家自然科学基金面上项目(61372185)

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- 被引次数: 0
出版历程
- 收稿日期: 2015-06-02
- 修回日期: 2015-11-23
- 刊出日期: 2016-03-19

Research on Clutter Suppression for Multichannel High-resolution Wide-swath SAR System

1.
HOU Lili①② ZHENG Mingjie① SONG Hongjun① QI Lijuan

Funds:

The National Natural Science Foundation of China (61372185)

摘要

摘要: 对于多通道高分辨率宽测绘带合成孔径雷达(HRWS SAR)，为了实现高分辨宽覆盖测绘能力，每个子孔径的回波信号均存在多普勒模糊，因此现有的杂波抑制方法不能有效的抑制杂波。针对这一问题，该文提出一种新的杂波抑制方法，并给出了对应的双门限CFAR检测方案。首先，借鉴数字波束形成(DBF)解多普勒模糊的思想，提出将自适应DBF技术应用于杂波抑制。然后，分析其存在的问题，并给出改进方案。改进方案可以降低杂波抑制所需要的自由度(DOFs)，解决运算量与估计精度之间的矛盾问题。最后，仿真结果验证了该文方法的有效性。
- 合成孔径雷达 /
- 动目标检测 /
- 高分辨率宽测绘带 /
- 杂波抑制
Abstract: For multichannel High-Resolution Wide-Swath SAR (HRWS SAR), to achieve high resolution wide cover mapping ability, the echoes of each channel suffer Doppler ambiguity, thus current clutter suppression approaches may not perform well. To solve the problem, this paper proposes a novel clutter suppression approach, and the corresponding double threshold CFAR detection scheme is given. First, inspired by the idea of solution for Doppler ambiguity based on Digital Beam Forming (DBF), adaptive DBF is applied to clutter suppression. Then, the existing problems are analyzed and the improved approach, which can reduce the Degree of Freedom (DOFs) and settle the problem between computation load and estimation accuracy, is given. At last, the effectiveness of the proposed approach is demonstrated by the simulated results.
- SAR /
- Moving target detection /
- High-Resolution Wide-Swath (HRWS) /
- Clutter suppression

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参考文献(24)

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