基于微多普勒特征的目标微动参数估计

Micro-motion parameter estimation of ballistic missile target based on micro-Doppler feature

本文首先建立了锥体目标微动模型,分析了其微多普勒特征,从理论上预测了多普勒谱宽与微动参数和目标几何参数的线性关系,然后由目标雷达回波模型,利用数值解的方法验证了多普勒谱宽与微动参数的线性关系,由此提出了一种新的锥体目标雷达特征提取和参数估计的方法。最后使用软件对目标进行电磁散射建模,并利用静态建模数据完成准动态的建模,使用仿真数据估计微动和目标几何参数,最后通过仿真结果证明本文提出的方法的效果。

A typical micro-motion model is set up for cone-shaped target,and its micro-Doppler feature is analyzed. The approximate linear law is found for width of Doppler spectrum and precession parameters. With a theoretic echo model, the linear law is validated by numeric emulation. Then a new method is proposed for radar feature extraction from cone-shaped target and micro-motion parameters estimation. The electromagnetic scatter model of the target is set up by a soft and its simulation data is used to estimate micro-motion parameters and geometrical parameters. Simulation results validate the new method proposed by author.