时钟同步对星载多通道合成孔径雷达成像影响

杨威; 李春升; 陈杰; 王鹏波

时钟同步对星载多通道合成孔径雷达成像影响

北京航空航天大学电子信息工程学院, 北京 100191

详细信息

作者简介:
杨威(1983-),男,湖北人,博士生,主要从事星载SAR高分辨率雷达信号仿真与成像技术、新体制雷达技术的研究;李春升(1963-),男,天津人,教授,博士生导师,主要从事星载SAR系统总体与仿真、多源遥感图像信息融合、信息获取与处理等方面的研究工作;陈杰(1973-),男,河南人,副教授,博士生导师,信息获取与处理、高分辨率雷达成像、星载SAR系统总体分析与仿真等方面的研究工作。

通信作者:
杨威 E-mail:yangweigigi@ee.buaa.edu.cn

中图分类号: TN957
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出版历程
- 收稿日期: 2010-10-12
- 网络出版日期: 2020-12-30
- 发布日期: 2011-08-30

Effects of time synchronization on image quality of spaceborne multi-channels SAR

School of Electronics and Information Engineering, Beihang University, Beijing 100191, China

摘要

摘要: 主要分析了时钟同步对方位向多通道星载合成孔径雷达（SAR）成像质量的影响。结合星载多通道SAR系统对时钟同步误差进行数学建模，阐述了时钟同步对星载多通道SAR图像的影响方式。通过数学推导分析了方位向成对回波的幅度及位置，并指出了时钟同步误差对方位向主瓣压缩性能的影响具有周期性，同时还会导致距离向主瓣压缩性能恶化。在此基础上，进一步研究了时钟抖动对成像质量的影响。最后，计算机仿真验证了理论分析结果的正确性。
- 合成孔径雷达 /
- 多通道 /
- 时钟同步 /
- 成对回波
Abstract: This paper discusses the effects on image quality of multi-channel spaceborne synthetic aperture radar (SAR) caused by time synchronization error.First,a synchronization model is built combined with spaceborne multi-channel SAR system,and the influence mode of time synchronization on SAR image is also illuminated. Then,the amplitude and position of paired-echoes in azimuth are analyzed by mathematic derivation,and the periodic effects on azimuthal main lobe are illuminated as well.Moreover,the performance deterioration of main lobe in range are presented resulted from time synchronization error.and effects on image quality caused by time jitter is researched.Finally,the simulation results justify the validity of the analysis.
- SAR /
- multi-channels /
- time synchronization /
- pairs-echoes

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参考文献(12)

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