| 基于通用复时频分布的进动目标微多普勒提取 |
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| 引用本文： | 寇鹏,刘永祥,李康乐,霍凯.基于通用复时频分布的进动目标微多普勒提取[J].系统工程与电子技术,2011,33(7):1462-1467. |
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| 作者姓名： | 寇鹏 刘永祥 李康乐 霍凯 |
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| 作者单位： | 1. 国防科学技术大学电子科学与工程学院， 湖南 长沙 410073; ;
2. 西安卫星测控中心， 陕西 西安 710043 |
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| 基金项目： | 国家自然科学基金(60872134)资助课题 |
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| 摘 要： | 首先建立了进动锥体目标的雷达回波模型，推导了目标微多普勒频率与进动参数的定量关系。针对进动目标雷达回波具有的多分量非线性调频特点，提出了通用复时频分布(generalized complex time frequency distribution, GCD)的微多普勒提取方法，与线性和二次Cohen类时频分布相比，GCD具备高时频分辨力、低交叉项的优点。同时针对峰值估计微多普勒瞬时频率(instantaeous frequency, IF)方法受信号频率交叉覆盖和噪声干扰严重的问题，提出基于Viterbi算法的微多普勒IF估计方法，有效提高了微多普勒IF估计精度。实验中利用仿真和暗室测量数据验证了GCD Viterbi方法的性能。
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| 关 键 词： | 微多普勒 进动 复时频分布 瞬时频率 |
Micro-Doppler extraction of precession targets based on generalized complex-time-frequency distribution |
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| KOU Peng,LIU Yong-xiang,LI Kang-le,HUO Kai.Micro-Doppler extraction of precession targets based on generalized complex-time-frequency distribution[J].System Engineering and Electronics,2011,33(7):1462-1467. |
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| Authors: | KOU Peng LIU Yong-xiang LI Kang-le HUO Kai |
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| Institution: | 1. School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China； ;
2. Xi’an Satellite Control Center, Xi’an 710043, China |
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| Abstract: | The radar signal model of cone targets with precession is provided,which can develop the relationship between micro-Doppler and precession parameters.Due to the characteristics of nonlinear frequency modulated and multi-components in radar signal,generalized complex-time-frequency distribution(GCD) is introduced to analyze the micro-Doppler of targets with precession,which has better concentration and time-frequency resolution compared with that of classical time-frequency distributions.Moreover,the estimat... |
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| Keywords: | micro-Doppler precession generalized complex-time-frequency distribution instantaneous frequency |
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