刚性球上均匀圆阵声源方位角估计算法仿真  

Simulation of DOA Estimation Algorithm Using UCA Mounted Around a Rigid Sphere

作　　者：张成[1] 陈克安[1] 

机构地区：[1]西北工业大学航海学院,陕西西安710072

出　　处：《计算机仿真》2009年第12期320-324,共5页Computer Simulation

摘　　要：为了研究环绕在刚性球上均匀圆阵声源方位角估计问题。以环绕在刚性球上的均匀圆阵为阵列模型,分析了刚性球体对圆阵响应的影响,在球坐标系下对声场分解所得到的特征波束空间,利用EB-ESPRIT算法和EB-Unitary-ESPRIT算法实现了声源方位角估计。计算机仿真表明,在独立声源条件下,两种算法均能较好地估计出空间多个声源的方位角,并且EB-Unitary-ESPRIT算法计算量小,估计精度高。另外具有解相关声源的能力。Direction of arrival （DOA） of acoustic sources with baffles is discussed using the array model of an uniform circular microphone array （UCA） mounted around a rigid spherical baffle. The influence of the rigid spherical baffle on UCA response is analyzed. In the eigenbeam space derived from the decomposed wavefield in spherical coordinates, DOA estimation of acoustic sources is realized using algorithms named EB - ESPRIT and EB - Unitary - ESPRIT respectively. Computer simulations demonstrate that both of these two algorithms have the ability of estimating the bearing angles of independent multi - acoustic sources validly. Furthermore, the EB - Unitary - ESPRIT algorithm has the merits of low computational load and high performance, and the ability of processing coherent acoustic sources.

关 键 词：均匀圆阵 声场分解 特征波束 波达方向 

分 类 号：TN911.7[电子电信—通信与信息系统]