基于均匀圆阵的信号源DOA估计方法

Estimation of DOA for Uniform Circular Array

该文研究了基于均匀圆阵阵列的信号波达方向估计问题 .对一维角度估计采用MUSIC算法 ,通过谱峰搜索得到信号的方位角 ;对二维角度估计采用模式激励法 ,对均匀圆形阵列的输出信号进行模式激励 ,使其阵列流形具有类似于均匀线性阵列的形式 ,在此基础上 ,对波达矩阵进行特征分解 ,由各特征值对应的特征向量处理得到对应信号的到达方向 .给出的计算机仿真结果证实了它们的有效性 .

In the paper, algorithms are presented to estimate the DOA of uncorrelated signals incident on a uniform circular array(UCA). Through spectral search of MUSIC algorithm, one-dimensional angle can be estimated. The mode excitation method is used to estimate the two-dimensional angle. Transform the manifold matrix of UCA into one with a form similar to that of a ULA, then estimate the DOA from the eigenvectors of the DOA matrix respectively. The performance of the methods is demonstrated by simulations.