基于Toeplitz矩阵重构的宽带相干信号方位估计

Direction Estimation Algorithm for Wideband Coherent Signals Based on Reconstruction of Toeplitz Matrix

根据天线阵列接收到的数据,提出了一种基于Toeplitz矩阵重构的宽带相干源方位估计算法。该算法先由Toeplitz阵列接收到的数据得到包含波达方向信息的协方差矩阵,再对该协方差矩阵进行聚焦处理,得到同一频率的阵列协方差矩阵,最后由高分辨子空间处理方法得到宽带相干信号的波达方向估计。仿真实验证明了该方法的有效性。

According to the data received by the array antenna, a direction-of-arrival （DOA） estimation algorithm for wideband coherent sources is presented based on Toeplitz matrix reconstruction. Firstly, the covariance matrix which includes the information of DOA is obtained from the data received by Toeplitz matrix. Secondly, the covariance matrix is processed with the focusing matrix to get the new covariance matrix in the same frequency. Finally, the DOA estimation can be obtained by the high resolution subspace approach. Simulation results prove the effectiveness of this method.