Abstract:Laser micro-Doppler system has the advantages of high detection sensitivity and multi-dimensional detection parameters, and can accurately detect and identify low, small and slow targets and space targets in a long distance. Focusing on the application requirements of fast detection and accurate recognition of low, small, and slow unmanned aerial vehicles (UAVs) targets, this paper introduces the laser micro-Doppler detection technology and its domestic and international development status, and comprehensively and deeply explores multiple aspects such as laser micro-Doppler modulation theoretical model, micro-motion parameter extraction algorithm, one-dimensional high-precision imaging, system and experimental research. On this basis, a summary and outlook were made on the research progress of laser micro-Doppler detection of rotor UAVs technology.