The estimation of the delay between two signals is examined in the limit of high signal-to-noise ratio (SNR). It is shown that for the case of white noise, cross correlation with no prefiltering approaches the optimal maximum-likelihood (ML) estimator as the SNR grows to infinity. In simulation experiments with SNRs greater than 1, it outperforms the approximate ML estimator, which is based on estimated spectra. Other algorithms, such as generalized cross correlation or parameter estimation algorithms, are shown to be suboptimal at high SNRs.<>
Time delay estimation at high signal-to-noise ratio
IEEE Transactions on Aerospace and Electronic Systems ; 27 , 2 ; 234-237
1991-03-01
281195 byte
Article (Journal)
Electronic Resource
English
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