一种用于合成孔径雷达的数字去斜方法

詹学丽; 王岩飞; 王超; 李和平

doi:10.12000/JR14117

一种用于合成孔径雷达的数字去斜方法

DOI: 10.12000/JR14117

中国科学院电子学研究所北京 100190

基金项目:

国家自然科学基金(61101201)资助课题

详细信息

作者简介:
詹学丽(1976-),女,中国科学院电子学研究所,博士,主要研究方向为SAR成像理论及其信号处理等;王岩飞(1963-),男,中国科学院电子学研究所,博士生导师,研究员,主要研究方向为微波成像雷达系统及其理论、数字信号处理等;王超(1983-),男,中国科学院电子学研究所,博士,主要研究方向为SAR成像理论及其信号处理等;李和平(1978-),男,中国科学院电子学研究所,副研究员,主要研究方向为SAR系统及其相关技术等。

通讯作者:
詹学丽

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出版历程
- 收稿日期: 2014-10-22
- 修回日期: 2015-01-08
- 网络出版日期: 2015-08-28

A Digital Dechirp Approach for Synthetic Aperture Radar

Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China

摘要

摘要: 该文提出了一种用于合成孔径雷达(SAR)的数字去斜方法, 适用于发射信号脉冲宽度能够覆盖整个测绘条带的轻小型SAR系统。利用该方法, 可以首先采用低于雷达系统发射信号带宽的采样频率对回波信号进行数字采集, 之后在数字域对距离向回波信号去斜, 通过频率分析法完成距离向的压缩处理, 无混叠地恢复出目标信息。该文给出了新方法的理论分析与数学推导, 并给出采样率选取准则, 通过仿真验证了该方法的正确性和有效性。
- 合成孔径雷达(SAR) /
- 去斜 /
- 低采样率 /
- 脉冲压缩
Abstract: In this study, a digital dechirp approach for Synthetic Aperture Radar (SAR) is discussed. It can be applied to lightweight MiniSar systems with longer pulse width than swath. With this method, and after data acquisition with lower sampling rate than the bandwidth of the transmitted LFM signal and digital dechirp, pulse compression can be obtained by spectral analysis in the range direction without aliasing. The approach is described in detail and the sampling frequency selection criteria are derived. Theoretical formulations and numerical simulations verify the validity of the proposed approach.
- Synthetic Aperture Radar (SAR) /
- Dechirp /
- Low sampling rate /
- Pulse compression

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参考文献(14)

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