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在建立口径为200mm,波长为1550nm的全光纤型激光相干雷达探测系统的基础上,展开对运动目标微多普勒效应的实验研究。对实验获取信号进行频谱分析和时域-频域联合分析的结果表明,时间-频域联合分析方法可有效地提取运动目标的微多普勒效应特征,从而得到目标在20～2000Hz的振动特征。利用这些特征可区分和识别不同运动目标,为目标的探测、分类和识别提供了一条有效的途径。
Based on the establishment of an all-fiber laser coherent radar detection system with a diameter of 200 mm and a wavelength of 1550 nm, experimental studies on the micro-Doppler effect of moving targets are carried out. The results of spectrum analysis and time domain - frequency domain joint analysis of experimentally acquired signals show that the time - frequency domain joint analysis method can effectively extract the micro - Doppler effect characteristics of moving targets and get the vibration characteristics of 20 ~ 2000Hz . The use of these features to distinguish and identify different moving targets provides an effective way to detect, classify and identify targets.