中文摘要：

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．

英文摘要：

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.