基于加权改进 MUSIC 算法的相干信号波达方向估计

摘要

Because classical DOA(Direction of Arrival)estimation algorithms often fail to deal with coherent signals,a new DOA estimation algorithm based on weighted-modified MUSIC(Multiple Signal Classifi-cation) algorithm was proposed in this paper.In this algorithm,the data covariance matrix was reconstructed at first, and new noise subspace was constructed then.Finally the eigenvectors of noise subspace were weighted based on the size of the gain value,and the DOA estimation of coherent signals was completed.Computer simulation indi-cated the algorithm estimated the DOA of coherent signals successfully.%针对传统波达方向估计算法对相干信号失效的问题，提出了基于加权改进多信号分类法(MUSIC)的波达方向估计算法。该算法首先对接收数据协方差矩阵进行重构，进而构造出新的噪声子空间，再根据特征值大小对噪声子空间特征向量进行加权，完成对相干信号的波达方向估计。仿真分析表明，算法成功地完成了对相干信号的波达方向估计。