The micro-doppler effect in lidar is a new technology research spot in recent years. The exquisite micro-doppler features in the micro electromagnetic scattering target are the unique features of the micro goal. It has unique advantages in target detection and recognition. This article firstly introduces the concept and goal of micro-doppler and the significance of micro-doppler characteristics identification. Then the research progress at home and abroad are reviewed from the theory of micro-doppler, the extraction method of micro target features and the recognition system of micro-doppler target. The vibration target detection system of Michelson interferometer technology and the working mechanism of the optical fiber coupling micro-doppler target recognition system are analyzed in detail. Finally, the micro-doppler target detection and recognition technology are expounded.%激光雷达中的微多普勒效应是近年来一个新的技术研究热点.微动目标电磁散射回波中包含的精细微多普勒特征是微动目标独一无二的特征,这在目标探测和识别方面具有独特的优势.本文首先介绍了微多普勒的概念及目标微多普勒特征识别的重要意义.然后从微多普勒理论、微动目标特征的提取方法和微多普勒目标识别系统方面综述了国内外研究发展进程,并详细分析了基于迈克尔逊干涉仪技术的振动目标探测系统及光纤耦合微多普勒目标识别系统的工作机理.最后对微多普勒目标探测与识别技术进行展望.
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