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

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.