| 二阶运动补偿对低频超宽带SAR视线误差补偿的影响 |
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| 引用本文： | 李建阳,常文革,黎向阳.二阶运动补偿对低频超宽带SAR视线误差补偿的影响[J].电子与信息学报,2011,33(4):792-797. |
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| 作者姓名： | 李建阳 常文革 黎向阳 |
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| 作者单位： | 国防科学技术大学电子科学与工程学院; |
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| 摘 要： | 视线误差补偿是低频超宽带合成孔径雷达(UWB SAR)成像处理的关键，该文主要研究基于测量数据的距离空变视线误差补偿，即二阶补偿。标准的二阶补偿在推导的过程中，对回波进行了一定的近似，认为距离空变视线误差对回波距离迁徙校正(RCMC)没有影响，而这个近似条件，在低频超宽带SAR中是不满足的。针对这个问题，该文对二阶补偿在低频超宽带SAR中的应用进行了分析，研究了3种二阶补偿方法，即:二阶补偿位于RCMC之后完成；二阶补偿位于RCMC之前完成；沿距离向划分子带进行二阶补偿。文中对3种二阶补偿方法进行了对比分析，并对每种补偿方法中存在的误差进行了分析。最后采用仿真以及实测低频超宽带SAR数据验证了文中分析的正确性。
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| 关 键 词： | 低频超宽带SAR 距离空变 二阶运动补偿 距离迁徙校正 |
| 收稿时间： | 2010-08-05 |
Second-order Motion Compensation Effects on Light of Sight Error Compensation in Low-frequency Ultra Wide-band SAR |
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| Li Jian-yang,Chang Wen-ge,Li Xiang-yang.Second-order Motion Compensation Effects on Light of Sight Error Compensation in Low-frequency Ultra Wide-band SAR[J].Journal of Electronics & Information Technology,2011,33(4):792-797. |
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| Authors: | Li Jian-yang Chang Wen-ge Li Xiang-yang |
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| Affiliation: | Li Jian-yang Chang Wen-ge Li Xiang-yang(School of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073,China) |
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| Abstract: | The MOtion COmpensation(MOCO) of Light Of Sight(LOS) error is very important in low-frequency Ultra Wide-Band Synthetic Aperture Radar(UWB SAR).In this paper,the second-order MOCO is studied which compensate the range-variant component of LOS error.In second-order MOCO,the assumption that there is no effect of range-variant LOS error on the Range Cell Migration Correction(RCMC) is supposed,which is not satisfied in UWB SAR.This paper analyzes the application of the second-order MOCO in low-frequency UWB SAR... |
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| Keywords: | Low-frequency ultra wide-band SAR Range-variant Second-order motion compensation Range Cell Migration Dorrection(RCMC) |
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