复合运动目标微多普勒特征的分析和提取  

Micro-Doppler feature analysis and extraction of the complex motion target

作　　者：陈广锋[1,2] 张林让[1] 王纯[1] 刘高高[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071 [2]西安文理学院数学系,陕西西安710065

出　　处：《西安电子科技大学学报》2011年第3期55-62,共8页Journal of Xidian University

基　　金：国家自然科学基金资助项目(60672130)

摘　　要：目标的微运动所产生的微多普勒特征包含了目标的运动和结构信息.针对目标微运动特征的复杂性和差异性,以无旋翼目标和有旋翼目标为背景,分别建立了具有平动、加速与振动特征的散射点模型和具有平动、加速、振动及旋转运动特征的散射点模型,分析了两种模型的微多普勒特征及其差异.通过仿真,采用平滑伪Winger-Ville时频分析方法,从雷达回波中提取了两种复合运动的微多普勒特征,结果与理论推导一致,从而验证了模型及其微多普勒理论分析的正确性.Micro-Doppler signature produced by micro-motion contains movement and structure information which is useful for radar classification and recognition. Because of the complexity and difference of micromotion, based on non-rotor targets and rotary-wing targets, the complex motion scattering point with translation, acceleration and vibration is modeled, so is complex motion scattering point with translation, vibration, acceleration and rotation. Then their micro-Doppler modulation and difference are analyzed. By simulation, the micro-Doppler modulation induced by the two models is extracted from the radar echo with the Smoothed pseudo Winger-Ville time-frequency analysis method, which agrees well with the computed results and proves that the models and the mathematical derivation of their micro-Doppler theoretical analysis are valid.

关 键 词：微多普勒 复合运动 振动 旋转 时频分析 

分 类 号：TN911.72[电子电信—通信与信息系统]