A new algorithm for multipath time delay estimation in low SNR using MLE method

In this paper, we consider the effects of multipath on a white random process which might have originated from an acoustic source in the far field. This process is observed along with a white noise. Maximum likelihood technique (ML) is being used to estimate the time delays caused by a dispersive environment. We also prove that at low SNR, ML technique to estimate time delays corresponds to the technique of minimizing output autocorrelation. Then, we present a new algorithm to obtain time delays using autocorrelation maximization. In this paper, we also perform the algorithm on a wideband signal and remove the effects of multipath.