机载下视阵列合成孔径雷达成像的微多普勒效应

杨俭; 侯海平; 曲长文; 周强; 冯万

机载下视阵列合成孔径雷达成像的微多普勒效应

杨俭^1,2,,
侯海平³,
曲长文¹,
周强¹,
冯万²

1.
海军航空工程学院电子信息工程系, 山东烟台 264001
2. 94638部队, 江西南昌 330201
3.

详细信息

作者简介:
杨俭,(1982-),男,江西人,工程师,海军航空工程学院博士生,主要研究方向为高分辨率雷达信息处理和微波遥感;侯海平,(1981-),男,山东人,博士,工程师,主要研究方向为高分辨雷达信息处理和微波遥感;曲长文,(1963-),男,山东人,海军航空工程学院教授,博士生导师,主要研究领域为雷达信号处理、电子对抗、阵列信号处理及数据融合等。

通信作者:
杨俭 E-mail:yangjian2575@163.com

中图分类号: TN957
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出版历程
- 收稿日期: 2011-12-08
- 网络出版日期: 2020-12-30
- 发布日期: 2012-10-30

Micro-Doppler effect for airborne downward-looking array SAR imaging

1.
Department of Electronic and Information Engineering, Naval Aeronautical&Astronautical University, Yantai Shandong 264001, China
2. 94638 Unit PLA, Nanchang Jiangxi 330201, China
3. 91039 Unit PLA, Beijing 102401, China

摘要

摘要: 机载阵列合成孔径雷达(SAR)采用机翼共形天线,机翼振动会引起回波相位误差而导致成像散焦。基于微多普勒模型和时频分析方法,研究了机载下视阵列调频连续波(FMCW)SAR成像的微多普勒效应。对振动模型进行了建模,结合阵元振动几何模型分析了信号特点,并基于时频分析方法对下视阵列FMCW SAR的微多普勒效应进行了成像仿真分析。结果表明,该方法可准确估计下视阵列SAR天线振动误差。
- 阵列SAR /
- 下视 /
- 微多普勒 /
- 时频分析
Abstract: Imaging defocusing may occur due to phase error induced by vibration of conformal antenna array fixed on wings of airborne array synthetic aperture radar(SAR).Micro-Doppler effect of airborne downward-looking array frequency modulated continuous wave(FMCW)SAR imaging is studied based on micro-Doppler model and time-frequency analysis method.Vibration model is established combined with array antenna vibration geometry model, and signal characteristic is analyzed.Then,imaging simulation and analysis of micro-Doppler effect are carried out based on time-frequency analysis method.Results indicate that the proposed method can realize accurate estimation of the antenna array vibration error.
- array SAR /
- downward-looking /
- micro-Doppler /
- time-frequency analysis

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参考文献(18)

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