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中文摘要：
分析了旋转目标的微多普勒特性与微运动参数的关系,指出其微多普勒信号为三参数的正弦调频信号。针对这一信号形式,推导了多分量正弦调频信号的时频分布特性,提出了一种在时频图上检测三参数正弦曲线的Hough变换方法,进而提出了一种基于TFD-Hough（time frequency distribution-Hough）变换的微运动参数提取算法。仿真实验和外场试验数据处理表明了该方法的有效性和鲁棒性。
英文摘要：
It is pointed out that the micro-Doppler signature of the rotating target is three parameters sinusoidal frequency modulation（FM） signal by analyzing the relationship of micro-Doppler and micro-motion parameters.According to this signal form,the time-frequency character of multi-component sinusoidal FM is deduced,and a Hough transform method to detect three parameter sinusoidal curve in time-frequency plane is proposed,then a micro-motion feature exaction method based on TFD-Hough transform is provided.The simulation and the real data result show the method is effective and robust.
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