| 星载ScanSAR等效斜视距离模型的ECS成像算法 |
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| 引用本文： | 魏杰,周荫清,李春升.星载ScanSAR等效斜视距离模型的ECS成像算法[J].电子学报,2005,33(9):1545-1548. |
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| 作者姓名： | 魏杰 周荫清 李春升 |
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| 作者单位： | 北京航空航天大学电子信息工程学院,北京,100083;北京航空航天大学电子信息工程学院,北京,100083;北京航空航天大学电子信息工程学院,北京,100083 |
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| 摘 要： | 本文提出一种适用于大距离徙动星载ScanSAR成像处理的等效斜视距离模型Extended Chirp Scaling(ECS)成像处理算法.根据误差最小的等效斜视距离模型,改进了ECS成像算法的部分因子,给出了实现步骤.此外,为消除ScanSAR成像时的Scalloping效应,算法中还结合了视加权处理.最后,计算机仿真验证了算法的有效性,并进行了成像性能分析.
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| 关 键 词： | 等效斜视 ECS算法 星载ScanSAR 大距离徙动 视加权处理 |
| 文章编号： | 0372-2112（2005）09-1545-04 |
| 收稿时间： | 2004-03-18 |
| 修稿时间： | 2004-03-182005-02-16 |
Equivalent Squint Extended Chirp Scaling Algorithm for Spaceborne ScanSAR |
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| WEI Jie,ZHOU Yin-qing,LI Chun-sheng.Equivalent Squint Extended Chirp Scaling Algorithm for Spaceborne ScanSAR[J].Acta Electronica Sinica,2005,33(9):1545-1548. |
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| Authors: | WEI Jie ZHOU Yin-qing LI Chun-sheng |
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| Institution: | School of Electronic Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100083,China |
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| Abstract: | To resolve the precise imaging problem of spaceborne Scanned-beam Synthetic Aperture Radar(ScanSAR) with large range cell migration,a novel Equivalent-Squint Extended Chirp Scaling(ES-ECS) algorithm is proposed.The full derivation and the realizing approach of the algorithm are presented with the squinted equivalent range model,which describes the relationship of spaceborne geometrical more precisely than the broadside range model.And the optimum look weighting approach is also introduced to avoid the scalloping effect.Finally,the algorithm is verified by simulations. |
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| Keywords: | equivalent squint extended chirp scaling algorithm spaceborne ScanSAR large range cell migration look weighting processing |
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