麦克风阵列二维方向估计聚焦算法研究  

Research on 2D DOA Estimations Focusing Methods Based on Microphone Arrays

作　　者：居太亮[1] 彭启琮[1] 邵怀宗[1] 林静然[1] 

机构地区：[1]电子科技大学通信与信息工程学院,成都610054

出　　处：《电子科技大学学报》2008年第2期225-228,共4页Journal of University of Electronic Science and Technology of China

基　　金：四川省科技攻关项目(04GG021-020-02)

摘　　要：聚焦算法是解决宽带信号方向(DOA)估计问题的重要算法。常规的宽带聚焦算法需要进行预估计和多次迭代,算法的计算复杂度较高。该文根据宽带聚焦算法的思想,结合语音信号的特点,以各频率点的频域相关矩阵和聚焦点的相关矩阵的均方误差最小为最优化准则,提出了一种不需要预估计和迭代的二维宽带聚焦算法。该算法实时性好、计算复杂度低。采用八元均匀圆环麦克风阵列,仿真验证了该算法的良好二维DOA估计性能。The focusing algorithms are the key to solve the wideband signal direction of arrival （DOA） problem. Classical wideband focusing DOA estimation algorithms have such demerits as demond of initial information of DOA and several iterations as well as bad performance for real-time applications. A new type algorithm based on wideband focusing theory is presented in this paper. It does not require pre-estimations and iterations. The optimal criterion of this algorithm is the minimum mean square error （MMSE）. This algorithm has the advantage of the low computational complexity for the real-time applications. Simulation based on MATLAB shows the high performance of the proposed algorithm in planar uniform circle microphone array with eight elements.

关 键 词：频率聚焦算法 麦克风阵列 子空间方法 宽带信号方向估计 

分 类 号：TN914[电子电信—通信与信息系统]