| 星载聚束式SAR子孔径成像处理方法 |
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| 引用本文： | 王国栋,周荫清,李春升.星载聚束式SAR子孔径成像处理方法[J].电子与信息学报,2003,25(1):9-16. |
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| 作者姓名： | 王国栋 周荫清 李春升 |
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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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| 摘 要： | 该文分析了星载聚束式SAR的信号特性。在分析比较几种常见聚束式SAR成像算法的基础上,引入适用于星载聚束式SAR成像的改进chirp scaling算法。为解决高分辨率星载聚束式SAR具有的脉冲重复频率(PRF)过高,多普勒带宽中心频率时变性等问题,深入分析了采用子孔径方法的必要性及其实现方法,并将子孔径方法结合到chirp scaling算法中。最后,通过计算机仿真,验证了该算法适用于高分辨率星载聚束式SAR成像处理。
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| 关 键 词： | 合成孔径雷达 雷达成像 子孔径处理 Chirp scaling算法 |
| 收稿时间： | 2001-7-22 |
| 修稿时间： | 2001-11-25 |
A subaperture imaging approach of spaceborne spotlight SAR |
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| Wang Guodong,Zhou Yinqing,Li Chunsheng.A subaperture imaging approach of spaceborne spotlight SAR[J].Journal of Electronics & Information Technology,2003,25(1):9-16. |
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| Authors: | Wang Guodong Zhou Yinqing Li Chunsheng |
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| Affiliation: | Dept. of Electron. Eng., Beijing Univ. of Aeronautics & Astronautics Beijing 100083 China |
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| Abstract: | Signal properties of spaceborne spotlight SAR are discussed. Based on the analyses of a few spotlight imaging algorithm, a modified chirp scaling algorithm for spaceborne spotlight SAR is proposed. Besides, a subaperture method is combined with the algorithm. In order to resolve high Pulse Repetition Frequency (PRF) and the time-variant of Doppler center frequency, etc., the necessity and implementation approach of the subaperture method are analyzed thoroughly. The validity of the proposed method is tested by computer simulation. |
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| Keywords: | SAR Radar imaging Subaperture processing Chirp scaling algorithm |
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