With years of development and accumulation, a considerable amount of research has focused on micro-motion, an important auxiliary feature in radar target detection and recognition. With the recent rise of terahertz, micro-motion feature extraction in the terahertz region has increasingly highlighted its advantages. Herein, we systematically surveyed the recent research on terahertz radar micro-motion feature extraction and discussed micro-motion feature analysis, micro-motion feature extraction, and micro-motion target imaging. And then we emphatically introduced the work of our research team, including the theoretical and experimental research on micro-motion feature analysis, micro-motion feature extraction and high-resolution/high-frame micro-motion target imaging. Furthermore, we analyzed the growing trend of micro-motion feature extraction in the terahertz region, and pointed out the new technology directions worth to be studied further and the technical challenges to be solved.%微动特征是目标探测与识别的重要辅助特征.随着近年来太赫兹研究的兴起,太赫兹雷达目标微动特征提取正在逐渐凸显出其特殊优势.本文首先对近年来国内外太赫兹频段雷达目标微动特征提取方面的研究进行整理总结,从太赫兹频段微动特性分析、微动特征提取和微动目标成像等几个方面进行了深入的介绍和分析.然后针对太赫兹频段的优势和特殊性,介绍了本单位在太赫兹微动目标特性分析、特征提取和高分辨高帧频成像方面的工作.最后对太赫兹雷达目标微动特征提取的发展趋势进行了展望,并分析了本领域值得进一步深入研究的技术方向和有待解决的技术难题.
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