基于Khatri-Rao子空间和传播算子的宽带声源波达方向估计算法  

Broadband direction-of-arrival estimation based on Khatri-Rao subspace and propagator method

作　　者：冯大航[1] 鲍明[1] 管鲁阳[1] 谢维[1] 李晓东[1] 

机构地区：[1]中国科学院声学研究所噪声与振动重点实验室,北京100190

出　　处：《应用声学》2012年第2期103-108,共6页Journal of Applied Acoustics

摘　　要：本文提出基于Khatri-Rao子空间和传播算子的宽带声源波达方向估计算法。该算法将声源不同频率处的协方差矩阵变换重排为一个高维矩阵,然后利用传播算子方法估计宽带声源波达方向。该算法计算复杂度介于聚焦Khatri-Rao子空间和相干子空间算法之间。仿真和实验结果表明,该算法在降低计算量的同时,估计误差与聚焦Khatri-Rao子空间算法相近,远小于相干子空间算法。A new direction-of-arrival （DOA） estimation method is proposed for uncorrelated wideband sources based on Khatri-Rao （KR） subspace and the propagator method. The proposed method transforms the covariance matrices of different frequency bins-into a higher dimensional matrix through KR product, and then the propagator method is applied to estimate the DOA. The complexity of the proposed method is between Focusing Khatri-Rao subspace method （FKR） and coherent signal-subspace method （CSM）. The performances of these wideband methods are investigated through computer simulations and experiments. The results show that the root mean square error of DOA estimation from the proposed method is similar to FKR and much lower than CSM.

关 键 词：波达方向 宽带声源 Khatri—Rao子空间 传播算子 

分 类 号：TB556[理学—物理] O422[理学—声学]