The hands-free telephone problem: an annotated bibliography
Signal Processing - Special issue on acoustic echo control
A new time-delay estimation in multipath
IEEE Transactions on Signal Processing
On the Cramer- Rao bound for time delay and Doppler estimation (Corresp.)
IEEE Transactions on Information Theory
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In this paper, the existing Generalized Autocorrelation based Estimator (GAE) has been modified for estimation of time delays in multipath environment in the presence of uncorrelated noise. Here the multipath propagation output signal is modeled as a superposition of the delayed, attenuated, and filtered versions of the stationary Gaussian stochastic input signal. Accuracy Percentage (AP) performance measure has been used to characterize the performance of the estimators. The modified GAE performance has been compared, obtained both analytically and via simulation, with AP"C"R"L"B the equivalent CRLB expressed in AP. Simulation results show that the performance of the proposed estimator improves with the increase in SNR but deteriorates with the increase in number of multipath.