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Adaptive realization of a maximum likelihood time delay estimator

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3 Author(s)
Hahn, P.J. ; Dept. of Electr. Eng., Utah Univ., Salt Lake City, UT, USA ; Mathews, V.J. ; Tran, T.D.

This paper presents an adaptive maximum likelihood method for estimating the time difference of arrival of a source signal at two spatially separate sensors. It is well-known that the maximum likelihood technique achieves the Cramer-Rao lower bound for time delay estimation error for certain signal conditions. The α-β tracker is a heuristic mechanism that is heavily used in target tracking applications. In this work, we combine an adaptive realization of the maximum likelihood time delay estimator with the α-β tracker to obtain significant improvement in the performance of the tracker, Experimental results showing 2 to 8 dB improvement in the mean-square estimation error over the conventional α-β tracker for various signal-to-noise ratios are also included in the paper

Published in:

Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on  (Volume:6 )

Date of Conference:

7-10 May 1996