在建立1550 nm激光相干雷达探测系统的基础上,对运动目标微多普勒效应的探测进行实验研究。利用小波多尺度分析将实验所得到的时域信号分解为不同尺度下的信号成分,对包含微多普勒特征的信号成分进行重构(逆小波变换),从而获取了目标的微多普勒特征。为了更好地分析目标运动特征和估计运动参数,使用短时时-频分析方法对获取的信号做了进一步的处理。实验结果分析表明,该系统可有效地探测运动目标的微多普勒信息,且多尺度分析方法和短时时-频分析方法的联合应用可有效地提取运动目标的微振动信息。 Based on the establishment of a 1550 nm laser coherent radar detection system, the micro-Doppler effect detection of moving targets is studied experimentally. Using wavelet multi-scale analysis, the signal obtained in the experiment is decomposed into signal components at different scales and the signal components containing the micro-Doppler features are reconstructed (inverse wavelet transform) to obtain the target micro-Doppler feature. In order to better analyze the target motion characteristics and estimate the motion parameters, the acquired signal is further processed using the short-term time-frequency analysis method. The experimental results show that this system can effectively detect the micro-Doppler information of moving targets, and the combined application of multi-scale analysis and short-term time-frequency analysis can effectively extract the micro-vibration information of moving targets.