| 一种非定点的SAR运动补偿算法 |
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| 引用本文： | 苗慧, 王岩飞, 张冰尘,. 一种非定点的SAR运动补偿算法[J]. 电子器件, 2007, 30(4): 1404-1407 |
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| 作者姓名： | 苗慧 王岩飞 张冰尘 |
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| 作者单位： | 1. 中国科学院电子学研究所,北京,100080;中国科学院研究生院,北京,100080
2. 中国科学院电子学研究所,北京,100080 |
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| 摘 要： | 为了解决SAR运动补偿的问题,文章分析了载机存在距离向偏移时的SAR信号模型,提出了一种非定点的运动补偿方法.文章将运动误差分解为距离向的不变量与变化量,首先在频域内对距离向不变量进行补偿,在距离压缩后,利用合理近似,对距离向的变化量进行非定点补偿.最后,进行方位压缩即可得到高精度的SAR图像.仿真结果很好地验证了该算法的可行性.该算法不但可以补偿景物中心的运动误差,而且可以补偿整个距离向的运动误差.
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| 关 键 词： | 合成孔径雷达(SAR) 运动补偿 压缩 非定点 |
| 文章编号： | 1005-9490（2007）04-1404-04 |
| 修稿时间： | 2006-07-25 |
A Algorithm of Non-Fixed Point SAR Motion Compensation Based on the Wave Number Domain |
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| MIAO Hui,WANG Yan-fei,ZHANG Bing-chen. A Algorithm of Non-Fixed Point SAR Motion Compensation Based on the Wave Number Domain[J]. Journal of Electron Devices, 2007, 30(4): 1404-1407 |
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| Authors: | MIAO Hui WANG Yan-fei ZHANG Bing-chen |
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| Affiliation: | 1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100080, China; 2. Graduate School of the Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | The paper analyzes the signal modal when the trajectory deviations exist,and proposes a motion compensation algorithm in frequency field.It decomposes the motion errors to two parts,one is dependent to the range, which can be compensated directly;the other is independent to the range,which can be compensated by approximating.Finally,the high accuracy SAR image can be obtained by the azimuth compression.This method can compensate motion errors not only at the center of the scene,but also including the all range cell.The simulation result verifies the algorithm is feasible. |
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| Keywords: | synthetic aperture radar(SAR) motion compensation compress non-fixed point |
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