Time Delay Estimation Using Weighted CPSP Function

摘要

A new TDE technique using the CPSP function weighed on each band is proposed. Observed and theoretical CPSP spectra are uniformly divided into several bands, and time delay having maximum cross correlation coefficient between observed and theoretical CPSP functions on each band is searched. Then the observed CPSP function is weighted according to the phase linearity on each band. A weighted CPSP function is constructed by summing all the weighted CPSP functions on each band. The time-lag that maximizes the weighted CPSP function is then determined as the finally estimated time delay. The simulation results show that the proposed method has slightly better performance than other methods in the noisy and reverberant environment.