转动目标微多普勒效应的激光相干探测  

Laser coherent detection on Micro-Doppler effect of rotational target

作　　者：孙洋[1] 原帅[1] 吴婧[1] 张骏[1] 范亚夫[2] 

机构地区：[1]烟台大学光电信息学院,山东烟台264005 [2]中国兵器工业集团公司第五十二研究所烟台分所,山东烟台264000

出　　处：《红外与激光工程》2011年第6期1054-1058,共5页Infrared and Laser Engineering

基　　金：国防预先研究基金(51403040203QT0710)

摘　　要：建立了激光雷达探测运动目标转动结构微多普勒效应的数学模型,利用这套波长为1 550 nm的激光相干雷达探测系统,展开了应用激光微多普勒效应探测运动目标的实验研究和转动特征提取的方法研究。对目标的转动部分(如直升飞机的旋转叶片)不同运动状态进行了实验研究,采用频域分析和时频分析相结合的方法,对目标仅有转动部分运动和整体平动加转动的复合运动两种情况进行了实验对比,提取了运动特征,并成功估计出了运动参数,为目标识别提供了新的方法。从实验与分析可以看出该系统探测运动目标微多普勒信息的有效性和实用性,利用激光微多普勒效应和时频分析方法可以有效地揭示运动目标的运动特征,为目标探测、分类和识别提供了重要的信息。Firstly the mathematical model of detecting micro-Doppler effect of rotational target using laser ridar was presented,and then the detecting system of laser coherent radar worked in the 1550 nm wavelength was used in the experiments.The frequency and time-frequency analysis were utilized to analyze the signature of rotational target,and the rotational features in two groups of experiments were acquired and the motion parameters were estimated successfully.It provided new information and methods for target recognition.The analysis of experiment results shows： the system is effective and feasible in detecting the micro-Doppler information of the target,and the dynamic information of the target can be acquired effectively by micro-Doppler effect and time-frequency analysis,and it may provide further information for target detection,classification,and recognition.

关 键 词：激光相干探测 微多普勒效应 转动目标 时频分析 

分 类 号：TN958.98[电子电信—信号与信息处理]