一种基于稀疏阵列的插值-时间反演镜目标定位方法

A Target Locating Method Based on Interpolation-Time Reversal Mirror Technique Using Sparse Array

稀疏阵列在识别远场目标时,由于稀疏阵列的栅瓣和主瓣大小相当,导致无法分辨目标方向。本文根据均匀排布的稀疏天线阵列的位置信息和接收的目标散射信号,利用插值法按照对应的幅度相位在稀疏阵列阵元之间不断插入虚拟单元,使得稀疏阵列变为虚拟稠密阵列,再通过时间反演算法对虚拟稠密阵列进行时间反演,以此消除稀疏阵列的栅瓣,识别目标的方向。仿真计算结果验证了该方法的可行性和准确性。

When the sparse array recognizes the far-field target,it is impossible to distinguish the direction of the target because the size of the grid lobe and the main lobe of the sparse array are similar.This paper,based on the sparse antenna arrays of uniform configuration of location information and receive target reflection signal,using interpolation method in accordance with the corresponding amplitude phase in sparse array array yuan between insert virtual unit,the sparse array into a virtual dense array,travel through the time inversion algorithm to time reversal of virtual dense array,in order to eliminate the sparse array of gate disc so as to identify the target direction.Simulation results show that the method is feasible and accurate.