MIMO雷达二维低复杂度MUSIC测向算法

2-D Low-Complexity MUSIC Direction Finding Algorithm for MIMO Radar

基于单基地MIMO雷达收发天线共址特性,提出一种二维低复杂度MUSIC测向算法。该算法通过构造交换矩阵和降维矩阵,有效去除MIMO雷达收发联合处理过程的冗余信息,大大降低协方差矩阵的维度。仿真结果表明,该算法的低复杂度特性随阵面天线阵元数的增多越来越显著,同时具有和原MUSIC算法相近的角度估计性能,甚至在低SNR时能获得更高的估计性能。

Based on the co-address characteristic of monostatic MIMO radar transceiver antenna,a 2-D low-complexity MUSIC direction finding algorithm is proposed.This method effectively removes the redundant information in the MIMO radar transceiver joint processing,and it can reduce the dimension of the covariance matrix by constructing switching matrix and dimensionality-reducing matrix.Simulation results show that the low complexity of the proposed algorithm becomes more and more significant with the increase of the number of array antenna element.Meanwhile,this algorithm has the same performance as the original MUSIC algorithm,and it can even obtain higher estimation performance at low SNR.