一种改进的LFMCW雷达多目标加速度和速度估计方法

摘要

针对已有估计算法对线性调频连续波(LFMCW)雷达多目标加速度和速度参数的估计精度差、计算复杂度高等问题,该文提出一种改进方法.该方法将时频重排平滑伪Wigner-Ville 分布(RSPWVD)与Radon变换相结合,通过恒虚警率检测和阈值处理,实现了LFMCW雷达多目标加速度与速度参数估计,克服了现有方法中计算复杂、存在误差积累效应的缺点.给出了估计算法的实现步骤.仿真实验结果表明:改进方法在低信噪比时仍具有较高的参数估计精度.%Aiming at the problems of low accuracy and high computation complexity when estimating multi-target movement parameters,an improved method combining time-frequency reassigned smoothed pseudo Wigner-Ville distribution and Radon ( RSPWVD-Radon) transform is presented. This method adopts the constant false alarm rate detection and thresholds processing to estimate multi-target acceleration and velocity parameters in LFMCW radar, and can overcome the shortcomings of heavy computation burden and error accumulation effect in the existed algorithms. The realization steps of estimation algorithm are provided. The simulation results show that the method has higher parameter estimation accuracy even when the signal-to-noise ratio(SNR)is lower.