Title :
A modified crosspower spectrum phase method
Author :
Xiaohong, Ma ; Lili, Liang ; Fuliang, Vn
Author_Institution :
Sch. of Electron. & Inf. Eng., Dalian Univ. of Technol., China
Abstract :
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.
Keywords :
delay estimation; direction-of-arrival estimation; noise (working environment); reverberation; computer simulation; crosspower spectrum phase method; medium reverberation; signal to noise ratio; strong reverberation; time delay estimation method; time difference of arrival estimation; weak noise; weighting function; Acoustic noise; Attenuation; Degradation; Delay effects; Delay estimation; Mathematical model; Microphone arrays; Reverberation; Signal to noise ratio; Working environment noise;
Conference_Titel :
Neural Networks and Signal Processing, 2003. Proceedings of the 2003 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
0-7803-7702-8
DOI :
10.1109/ICNNSP.2003.1281114
