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An adaptive subsample delay estimator using a quadrature demodulator

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2 Author(s)
Maskell, D.L. ; Sch. of Comput. Eng., Nanyang Technol. Univ., Singapore ; Woods, G.S.

An on-line delay estimation algorithm based upon an analogue quadrature phase detector that is suitable for determining the subsample delay between two noisy sinusoidal signals is introduced. The new estimator uses a discrete-time quadrature technique to directly update the delay estimate, which is in turn used to adapt the coefficients of a simple fractional delay filter (FDF). The estimator is insensitive to variations in the amplitudes of the input signals, is simple to implement and has a reduced complexity compared to other adaptive techniques. Simulations show that in the presence of system noise, the new estimator significantly outperforms conventional fractional delay filter based estimators.

Published in:

Information, Communications and Signal Processing, 2003 and Fourth Pacific Rim Conference on Multimedia. Proceedings of the 2003 Joint Conference of the Fourth International Conference on  (Volume:2 )

Date of Conference:

15-18 Dec. 2003