A modified crosspower spectrum phase method
Xiaohong Ma, Liang Lili, Yin Fu-liang · 2003
The crosspower spectrum phase (CSP) is a well known time delay estimation method. The relatively precise time difference of arrival (TDOA) can be achieved by using it in the presence of weak noise and medium reverberation. The performance degrades dramatically in the case of low SNR and strong reverberation. A modified CSP (M/spl I.bar/CSP) method is proposed in order to improve the performance of CSP. The weighting function of M/spl I.bar/CSP changes with the variation of SNR, and the TDOA estimation is accomplished via a weighted of multi-frames. The computer simulation results indicate that the proposed method can give satisfying value of TDOA even in the case of low SNR and strong reverberation.