| 引用本文: | 周红,娄军,黄晓涛,等.基于子孔径图像的低频SAR多通道均衡方法.[J].国防科技大学学报,2010,32(4):78-83.[点击复制] |
| ZHOU Hong,LOU Jun,HUANG Xiaotao,et al.Low Frequency SAR Multi-channel Equalization Method Based on Subaperture Image[J].Journal of National University of Defense Technology,2010,32(4):78-83[点击复制] |
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| 基于子孔径图像的低频SAR多通道均衡方法 |
| 周红1, 娄军1, 黄晓涛1, 常玉林1,2, 周智敏1 |
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(1.国防科技大学 电子科学与工程学院，湖南 长沙 410073;2.中国人民解放军总参谋部61886部队，北京 100086)
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| 摘要: |
| 利用多通道SAR系统进行运动目标指示时，通道间的幅相失配严重影响了运动目标检测以及参数估计的性能。针对多通道低频SAR/GMTI系统，提出了一种基于子孔径SAR图像的多通道均衡方法。该方法利用相同视角的多通道子孔径图像，估计该角度对应的幅相误差，在达到较高幅相误差估计精度的同时，也能适应误差随视角的变化。基于车载低频多通道SAR/GMTI实测数据的实验结果表明：该方法能有效地补偿不同通道之间的幅相误差，提高运动目标的检测和参数估计性能。 |
| 关键词: 合成孔径雷达 子孔径图像 通道均衡 地面运动目标指示 |
| DOI： |
| 投稿日期：2009-09-14 |
| 基金项目:国家部委资助项目；教育部新世纪优秀人才支持计划资助项目(NCET-07-0223) |
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| Low Frequency SAR Multi-channel Equalization Method Based on Subaperture Image |
| ZHOU Hong1, LOU Jun1, HUANG Xiaotao1, CHANG Yulin1,2, ZHOU Zhimin1 |
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(1.College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China;2. 2.61886 Unit of the PLA Genearl Staff, Beijing 100086, China)
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| Abstract: |
| When the multi-channel SAR system is used for moving target indication, the imbalance in amplitude and phase among channels severely affects the performance of moving target detection and parameter estimation. For multi-channel low frequency SAR/GMTI system, a multi-channel equalization method based on subaperture image was proposed. The method makes use of multi-channel subaperutre images with the same view-angle, and estimates the amplitude and phase errors related to this view-angle at the same time. It can estimates the amplitude and phase errors accurately and adapts to the errors changing with the view-angle. The experiment based on vehicle-borne low frequency multi-channel SAR/GMTI real data demonstrates that this method can effectively compensate for the amplitude and phase errors among different channels and improve the performance of moving target detection. |
| Keywords: SAR subaperture image channel equalization ground moving target indication |
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