基于微动散射点分离的角闪烁抑制方法

Angle Glint Suppression Based on Micro-motion Dynamics Scatters Separation

针对近程毫米波雷达中目标角闪烁引起的测角误差问题,提出了一种基于微多普勒效应的多散射点分离角闪烁抑制方法。建立了多散射点目标的微多普勒回波模型,利用不同微动散射点微多普勒谱的区别,给出了一种基于重排平滑伪魏格纳维尔分布(Reassign smoothedpseudo Wigner-Ville distribution,RSPWVD)的多散射点角度信号分离和测量方法,研究了基于散射点回波幅度自适应融合加权的角闪烁抑制方法。仿真结果表明,此种方法能够有效抑制毫米波连续波雷达与微动目标在近距离的测角误差。

To solve the problem of angle measurement errors caused by target angle glint in short- range millimeter wave （MMW）radar, an angle glint suppression method based on multiple scatters separation using the micro-Doppler effect is proposed. The micro-Doppler echo model of multiple scatters target is established. Considering the different micro-Doppler spectrum of different scatters, the separation and measurement methods of target scatters angles based on reassign smoothed pseudo Wigner-Ville distribution （RSPWVD）is presented. A new angle glint suppression method is presented to adaptively fuse weighted angle based on echo amplitude. Simulation results show that this method can effectively decrease angular measurement error of micro-motion dynamics target at close range for the MMW continuous wave radar.