Robust time delay estimation based on non-Gaussian impulsive acoustic channel

Abstract

The aim of this letter is to propose a new robust method for time delay estimation over impulsive noise and investigate its practical implications. The method uses a nonlinear data transformation associated with the generalized crosscorrelation technique. Hence, simulations and experiments show better performance than traditional methods without increasing the computational cost. Our practical experiments indicate the possibility of obtaining a correlated impulsive noise, in which the proposed method is still presenting accurate estimations.

Evaluation of Acoustic Noise Level and Impulsiveness Inside Vehicles in Different Traffic Conditions

“…Impulsive phenomena, in which the noise changes suddenly to a value far from the mean in a short period of time, can affect the performance of signal processing solutions based on traditional Gaussian modeling [62][63][64]. In the context of this work, impulsive noise is relevant to source location [64][65][66][67][68], voice processing [69,70], and noise comfort and pollution [71,72]. In several of the works cited above, impulsiveness is modeled by an alpha-stable distribution.…”