The research of time delay estimation algorithm

In the existing microphone array sound source position, the calculating method of based on time difference of arrival (TDOA) is commonly used methods in current source location methods, for its calculation small, position high precision and easily achieved. In this method, the most important thing is the accuracy of time difference of arrival (TDOA) estimation, which will directly affect the accuracy of the positioning accuracy. The greatest shortcoming of the traditional time difference of arrival estimation methods is easily impacted by interference signal, which greatly causes the calculation error increased particularly in the noisy environment and noise-related cases. In this paper, an estimated arrival time difference method based on sub-band decomposition. Simulation experiments show that this method because its signal is re-sampling, to facilitate the realization of the adaptive filter for noise complex environment, and compared with the direct correlation, which has greatly enhanced the accuracy of the TDOA.