| 基于子孔径分离的SAR动目标检测与定位 |
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| 引用本文： | 王艳霞,张毅.基于子孔径分离的SAR动目标检测与定位[J].科学技术与工程,2011,11(14):3204-3208. |
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| 作者姓名： | 王艳霞 张毅 |
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| 作者单位： | 1. 中国科学院电子学研究所,北京,100190;中国科学院研究生院,北京,10049
2. 中国科学院电子学研究所,北京,100190 |
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| 基金项目： | 国家高技术研究发展计划（863计划）（2009AA7050613） |
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| 摘 要： | 提出了一种基于子孔径分离的SAR(Synthetic Aperture Radar)动目标检测与定位方法。首先分析了运动目标和静止目标在多个子孔径中图像的差异,提出了利用子孔径图像相减来抑制杂波。其次给出了子孔径划分的依据和过程,提出了子孔径图像配准的方法,并设计了运动目标检测与定位的信号处理流程。最后引入了出现速度模糊情况下结合距离走动量来辅助准确定位的方法。利用仿真结果验证了算法的有效性。此方法适用于单天线SAR,它具有处理方法简单、运算量小、可实时实现等优点。
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| 关 键 词： | 单天线SAR 动目标检测 子孔径 目标定位 |
| 收稿时间： | 2/23/2011 4:01:11 PM |
| 修稿时间： | 2/23/2011 4:01:11 PM |
The Method of Moving Target Detection and Location Based on Sub-apertures for SAR |
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| wang yanxia and zhang yi.The Method of Moving Target Detection and Location Based on Sub-apertures for SAR[J].Science Technology and Engineering,2011,11(14):3204-3208. |
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| Authors: | wang yanxia and zhang yi |
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| Institution: | WANG Yan-xia 1,2,ZHANG Yi1(Institute of Electronics,Chinese Academy of Sciences1,Beijing 100190,P.R.China,Graduate University of the Chinese Academy of Sciences2,Beijing 100049,P.R.China) |
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| Abstract: | A novel approach of Moving Target Detection (MTD) based on sub-apertures for the single-channel SAR is proposed in this paper. Firstly, the differences between the images of moving targets and stationary targets in sub-apertures are analyzed. The image subtraction between two sub-aperture images for clutter removing is proposed. Secondly, the principle and process of how to gain the sub-apertures and the match of their images are presented. The process flow of MTD and locating is designed. Lastly, the details about how to do target locating are described, combined with the length of range migration. The approach is validated by simulated echo data. This approach has several advantages, only single channel antenna, low cost, less computation load, real-time data processing, etc. |
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| Keywords: | Single-channel SAR MTD Sub-apertures Target locating |
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