双基地MIMO雷达多目标的时延估计方法

现有的双基地MIMO雷达目标角度和多普勒频率估计算法都要求已知目标的时延,然而实际中时延往往未知。对此该文提出了一种双基地MIMO雷达多目标的时延估计方法,可在角度和多普勒频率估计之前对目标的时延做出估计,从而为现有的角度和多普勒频率估计算法提供前提条件。方法将接收信号按周期切段,对各段信号进行滤波获得输出矩阵,时延的估计可通过对各矩阵F范数之和进行峰值搜索而获得。理论上论证了方法的可行性,并通过仿真实验进行了验证。

Multi-Target Time Delay and Estimation in Bistatic MIMO Radar

Existed methods for angle and Doppler frequency estimation of bistatic MIMO radar need to know the time delay of targets,but this condition can not be satisfied usually,so we propose a method to estimate the multi-target time delay in this paper.It can judge which time delay bins the targets belong to before angle and Doppler frequency estimation.Received signal is cut into sections by signal period,and the output matrix can be obtained after each section is filtered.The time delay estimation can be achieved directly by searching the peak of the F-norm of output matrix.The theoretical analysis and simulations prove this method is available.