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,在目标的分类、识别等领域中有着重要的作用.建立了具有平动、加速与旋转运动的微动模型,定量分析了目标的微多普勒调制特征及其与微动参数的关系,利用提取时频分析矩阵频率向最大值的峰值提取法和最小二乘拟合直线法估计目标的加速度、旋转频率和旋转半径等参数,最后通过仿真验证了理论分析的正确性和参数估计的有效性.%Micro-Doppler signature produced by micro-motion contains movement and structure information, which is useful for radar classification and recognition.In this paper, complex micro-motion scattering point with rotation and acceleration was modeled.Based on a quantitative analysis on micro-Doppler modulation, the acceleration, rotational frequency and rotational radius were estimated by peak value extraction method which extracted time-frequency analysis matrix maximum along the frequency and least square fitting straight line method.Finally, the simulation results verify the correctness of the theoretical analysis and the validity of the parameter estimation.
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