二维声矢量传感器阵列信号波达角估计

DOA estimation of two-dimensional acoustic vector sensor array signals

将最小冗余线阵结构从一维扩展至二维得到二维冗余阵列,同时各阵元使用声矢量传感器,从而形成二维声矢量传感器阵列。然后利用张量运算对该阵列信号的协方差进行处理得到一个虚拟的声矢量传感器均匀面阵,且虚拟阵元数远多于原物理阵元数即虚拟阵列具有高自由度。最后利用张量分解从虚拟阵列信号数据张量中估计出信号波达角。理论分析和仿真实验结果表明,新阵列及其处理方法具有更高的自由度、更优的信号波达角估计性能。

The two-dimensional redundant array is obtained by extending the minimum redundant linear array structure from one dimension to two dimensions.Meanwhile each array element uses the acoustic vector sensor,then the two-dimensional redundant array with acoustic vector sensors is proposed.By using tensor operation to process the covariance of the array signal,a virtual uniform area array with acoustic vector sensor can be obtained.The number of virtual elements is much more than the original physical elements,that is,the virtual array has a high degree of freedom.Finally,the direction of arrival is estimated from the virtual array signal data tensor by the tensor decomposition operation.Theoretical analysis and simulation results show that the new array and its processing method have higher degrees of freedom and better estimation performance of direction of arrival.