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| Time Delay Estimation by Using Modified Crosspower Spectrum Phase Technique |
| Ma Xiao-hong; Lu Xiao-yan; Yin Fu-liang |
| School of Electron. and Info. Eng.; Dalian Univ. of Tech.; Dalian 116024; China |
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Abstract The Crosspower Spectrum Phase (CSP) technique is a well known time delay estimation method. A relatively precise time delay estimation can be achieved by using it in the environment of weak noise and medium reverberation. The performance degrades sharply in the environment of low SNR and strong reverberation. The modified CSP algorithm is proposed in order to improve the performance of CSP. The weighting function of the proposed CSP method changes with the variation of SNR, and the time delay of arrival is accomplished via a weighted function of frames of CSP. Computer simulation results indicate that the proposed method will give satisfactory value of time delay estimation even in the environment of low SNR and strong reverberation.
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Received: 22 July 2002
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2004, Vol. 26 
