An improved time delay estimation method based on cross-power spectrum phase

In the application context of Anti-sniper acoustic detection positioning system, to solve the problems of lower accuracy and larger relative errors which appear when using those common correlation methods, an improved method based on the overlap add window segment and subsection de-noising cross-power spectrum phase is put forward in this paper. The experiments show that this method can improve the accuracy of time delay estimation and reduce the relative errors of six estimated values in the four-element array simultaneously.