| 基于非线性FM滤波的SC-ChirpScaling算法 |
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| 引用本文： | 陈杰,黄岩,李春升,周荫清. 基于非线性FM滤波的SC-ChirpScaling算法[J]. 电子学报, 2000, 28(12): 5-7 |
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| 作者姓名： | 陈杰 黄岩 李春升 周荫清 |
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| 作者单位： | 北京航空航天大学电子工程系,北京 100083 |
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| 基金项目： | 国家 8 63计划支持课题 |
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| 摘 要： | 本文分析了Chirp Scaling算法推导过程中残留三次相位误差对成像质量的影响,在此基础上提出了一种基于非线性FM滤波的高分辨星载SAR成像处理SC-Chirp Scaling算法.该算法采用斜视等效距离模型,利用非线性FM滤波方法实现了Chirp Scaling算法的三次相位误差修正,使高分辨率星载SAR成像质量获得明显改善.计算机仿真结果验证了该算法的有效性.
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| 关 键 词： | 星载合成孔径雷达 Chirp Scaling算法 雷达成像 非线性FM滤波 |
| 文章编号： | 0372-2112(2000)12-0005-03 |
| 收稿时间： | 1999-07-27 |
| 修稿时间： | 1999-07-27 |
SC-Chirp Scaling Algorithm Based on Nonlinear FM Filter |
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| CHEN Jie,HUANG Yan,LI Chun sheng,ZHOU Yin qing. SC-Chirp Scaling Algorithm Based on Nonlinear FM Filter[J]. Acta Electronica Sinica, 2000, 28(12): 5-7 |
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| Authors: | CHEN Jie HUANG Yan LI Chun sheng ZHOU Yin qing |
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| Affiliation: | Department of Electronic Engineering,Beijing University of Aeronautics and Astronatics,Beijing 100083,China |
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| Abstract: | The effects of residual cubic phase error induced by Chirp Scaling algorithm on SAR image qualities are analyzed,and an SC Chirp Scaling imaging algorithm for high resolution spaceborne SAR based on nonlinear FM filter is proposed in this paper.Squint equivalent range model is used,and a nonlinear FM filter method is applied to achieve cubic phase error correction in the algorithm.Computer simulation results are presented,which illustrate the algorithm having the capability to acquire evident improvement of high resolution spaceborne SAR image qualities. |
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| Keywords: | spaceborne synthetic aperture radar chirp scaling algorithm radar imaging nonlinear FM filte |
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