中国激光, 2012, 39 (10): 1014001, 网络出版: 2012-09-10
运动目标微多普勒效应的激光雷达相干探测及特征提取
Laser Coherent Detection of Moving Target Based on Micro-Doppler Effect
探测器 微多普勒效应 振动目标 激光相干探测 时频分析 特征提取 detectors micro-Doppler effect vibration target laser coherent detection time-frequency analysis feature extraction
摘要
在建立口径为200 mm,波长为1550 nm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20~2000 Hz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。
Abstract
A laser coherent detection system, operating at 1550 nm and all fiber designed, is set up and a large aperture lens of 200 mm is used to collect scattered light. Using this system, the micro-Doppler effect of moving target is detected. The results of the signal analysis in spectrum analysis and time-frequency analysis show that time-frequency analysis is effectively to the feature extraction of micro-Doppler signal of moving target, which is time-varying. The different targets of 20~2000 Hz can be identified and classified by these characteristics. It provides an effective method of the feature extraction, classification and recognition of the target.
董晶, 陈蕊, 李小龙, 张骏. 运动目标微多普勒效应的激光雷达相干探测及特征提取[J]. 中国激光, 2012, 39(10): 1014001. Dong Jing, Chen Rui, Li Xiaolong, Zhang Jun. Laser Coherent Detection of Moving Target Based on Micro-Doppler Effect[J]. Chinese Journal of Lasers, 2012, 39(10): 1014001.