线性阵列互耦矩阵和波达方向的联合估计

 针对线性阵列中因存在互耦效应导致很难直接估计信号波达方向的问题,结合线性阵列的阻抗特性,针对均匀线阵提出了一种计算量更小、稳健性更强的互耦矩阵和波达方向的联合估计方法.并把该方法推广到一般的线性阵列,解决了互耦条件下线阵的测向问题.仿真结果验证了这种新的联合估计方法在均匀线阵中的性能改进情况,以及向一般线阵扩展模型的可用性.

Joint Estimation of Mutual Coupling Matrix and Direction-of-Arrival in Linear Arrays

The effect of mutual coupling in linear arrays blocks the estimation of the directions of the incident signals.A new method that focuses on jointly estimating the mutual coupling matrix and direction-of-arrival(DOA),with less computational cost and better robustness,is proposed by considering the characteristics of the mutual impedances in linear arrays.The new method is then extended to general linear arrays,solving the problem of bearing estimation in narrowband linear arrays in the presence of mutual coupling.Simulation results are presented to demonstrate the improvement in the performance of the new joint estimation method in uniform linear arrays and the availability in general linear arrays.