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Time delay estimation with low signal to noise ratios

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3 Author(s)
Chan, Y.T. ; Royal Military College of Canada, Kingston, Ontario, Canada ; Yansouni, P. ; Crozier, S.

Time delay estimation via cross-correlation exhibits a nonlinear phenomenon in which estimator performance deteriorates rapidly below a certain signal to noise ratio (SNR). This is a consequence of the large variances associated with estimating cross-correlation functions at low SNRs. A method for predicting the estimator behaviour at low SNR's, together with experimental results to confirm its validity, are given.

Published in:

Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '84.  (Volume:9 )

Date of Conference:

Mar 1984