| PRF可变的星载方位向多相位中心多波束SAR |
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| 引用本文： | 赵伟,宋红军.PRF可变的星载方位向多相位中心多波束SAR[J].电子与信息学报,2005,27(6):936-938. |
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| 作者姓名： | 赵伟 宋红军 |
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| 作者单位： | 中国科学院电子学研究所,北京,100080;中国科学院研究生院,北京,100039;中国科学院电子学研究所,北京,100080 |
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| 摘 要： | 方位向多相位中心多波束(DPCA)SAR可以解决测绘带宽和分辨率之间的矛盾,但严格限制了对脉冲重复频率(PRF)的选择。该文分析了方位向信号的频谱,给出了当PRF偏离理想值时均匀采样方位谱的重构方法,提出了PRF可变的DPCA模式。计算机仿真验证了新模式的正确性。
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| 关 键 词： | 合成孔径雷达（SAR） 多波束 宽测绘带 高分辨率 非均匀采样 |
| 文章编号： | 1009-5896(2005)06-0936-03 |
| 收稿时间： | 2004-1-16 |
| 修稿时间： | 2004年1月16日 |
Displaced Phase Centers Multibeam in Azimuth with PRF Alterable Mode of Spaceborne Synthetic Aperture Radar (SAR) |
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| Zhao Wei,SONG Hong-jun.Displaced Phase Centers Multibeam in Azimuth with PRF Alterable Mode of Spaceborne Synthetic Aperture Radar (SAR)[J].Journal of Electronics & Information Technology,2005,27(6):936-938. |
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| Authors: | Zhao Wei SONG Hong-jun |
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| Affiliation: | Institute of Electronics, Chinese Academy of Sciences, Beijing 100080, China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | SAR with Displaced Phase Centers multibeam in Azimuth (DPCA) can solve the confliction between swath width and resolution, but this mode is one Pulse Repetition Frequency (PRF) restriction. In this paper, the spectrum of the signal in the azimuth direction is analyzed, and the reconstruction method of the uniform spectrum in azimuth is given when PRF deviated from the ideal PRF. DPCA with PRF alterable mode is introduced. The simulation of point target is used to analyze the effect of this new method. |
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| Keywords: | SAR Multibeam Wide swath High resolution Nonuniform sampling |
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