基于刚性圆柱上均匀圆阵的声源方位角估计

本文探讨了存在障碍物时均匀圆阵声源方位角估计问题.以环绕在刚性圆柱上的均匀圆阵为阵列模型,分析了刚性圆柱障碍物对圆阵响应的影响,在柱坐标系下对声场分解所得到的特征波束空间,提出了EB-Unitary-ESPRIT算法,实现了声源方位角估计.计算机仿真结果表明,该算法能较好地估计出空间多个声源的方位角,计算量小,估计精度高,并且具有解相关声源的能力,为相关声源方位角估计的实际应用提供了一种解决方案.

Bearing estimation of acoustic sources using uniform circular array mounted on rigid cylindrical baffle

This paper is concerned with the problem of beating estimation of acoustic sources using uniform circular microphone array (UCA) mounted on rigid cylindrical baffle.The influence of rigid cylindrical baffle on UCA response is analyzed in detail.In the eigenbeam space derived from the decomposed wavefield in cylindrical coordinates,an algorithm named EB-Unitary-ESPRIT is proposed and beating estimation of acoustic sources is realized.This proposed algorithm can estimate beating angles of muhisources with low com- putational load and high performance.On the other hand,the algorithm has the ability of processing coherent acoustic sources and pro- vide a theoretical bases for bearing estimation of correlated acoustic sources in muhipath environment.The efficiency of the proposed method is verified by computer simulations.