| 调频连续波ISAR目标微多普勒特征分析 |
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| 引用本文： | 梁颖,张群,何劲,朱小鹏.调频连续波ISAR目标微多普勒特征分析[J].现代防御技术,2011,39(6):71-77. |
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| 作者姓名： | 梁颖 张群 何劲 朱小鹏 |
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| 作者单位： | 空军工程大学电讯工程学院,陕西西安,710077 |
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| 基金项目： | 国家自然科学基金项目(60971100) |
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| 摘 要： | 分析了调频连续波逆合成孔径雷达(FMCW-ISAR)的回波信号特性,讨论了脉冲持续时间内目标连续运动引起的多普勒频移对成像的影响,推导出导致一维距离像主瓣展宽和走动的相位因子,并进一步研究了该相位因子对基于调频连续波逆合成孔径雷达的目标微多普勒特征的影响,在此基础上讨论了调频连续波逆合成孔径雷达目标微多普勒特征与脉冲式逆合成孔径雷达目标微多普勒特征的主要区别.最后的仿真试验验证了理论分析的正确性.
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| 关 键 词： | 调频连续波逆合成孔径雷达 脉冲式逆合成孔径雷达 多普勒频移 微多普勒特征 |
Analysis of Micro-Doppler Effect in FMCW-ISAR |
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| LIANG Ying
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ZHANG Qun
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HE Jin
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ZHU Xiao-peng.Analysis of Micro-Doppler Effect in FMCW-ISAR[J].Modern Defence Technology,2011,39(6):71-77. |
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| Authors: | LIANG Ying ZHANG Qun HE Jin ZHU Xiao-peng |
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| Institution: | (AFEU,Telecommunication Engineering Institute,Shaanxi Xi’an 710077,China) |
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| Abstract: | The characteristics of the echoed signal transmitted by FMCW-ISAR are analyzed.The influence of the Doppler-frequency shift impacted by the target’s continuous moving in the inner-pulse time duration is discussed and the phase coefficient which results in the main lobe widening and deviation of the range profile is obtained.Then the influence of the phase coefficient on the micro-Doppler(m-D ) features based on the FMCW-ISAR is studied and the main differences of the m-D characteristics between the pulsed ISAR and FMCW-ISAR are discussed.The simulation experiment has verified the validity of the theoretical conclusions. |
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| Keywords: | frequency modulation continuous wave inverse synthetic aperture radar(FMCW-ISAR) pulsed ISAR Doppler-frequency shift micro-Doppler features |
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