A hardware efficient implementation of an adaptive subsample delay estimator

Maskell, Douglas L., Woods, Graham S., and Kerans, Andrew (2004) A hardware efficient implementation of an adaptive subsample delay estimator. In: Proceedings of IEEE International Symposium on Circuits and Systems ISCAS 2004 (3) From: IEEE International Symposium on Circuits and Systems ISCAS 2004, 23-26 May 2004, Vancouver, Canada.

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A real-time algorithm for estimating the subsample delay between two noisy sinusoidal signals is presented. The new technique is based on the recently proposed discrete-time quadrature delay estimator (QDE). The algorithm uses all of the in-phase and quadrature-phase components of the received signals to produce a bias-free estimate of the delay between the input signals. The technique directly updates the delay error estimate, which is in turn used to adapt the coefficients of a simple fractional delay filter (FDF). The algorithm is insensitive to variations in the amplitudes of the input signals, and does not require an accurate estimate of the frequency of the input sinusoids. The technique is simple to implement and has a significantly reduced complexity compared to other adaptive techniques. Simulations show that in the presence of system noise, the new estimator outperforms conventional fractional delay filter based estimators.

Item ID: 14732
Item Type: Conference Item (Research - E1)
ISBN: 978-0-7803-8251-0
Keywords: evaporation duct; radio propagation
Date Deposited: 19 Nov 2010 00:38
FoR Codes: 10 TECHNOLOGY > 1005 Communications Technologies > 100599 Communications Technologies not elsewhere classified @ 70%
09 ENGINEERING > 0911 Maritime Engineering > 091199 Maritime Engineering not elsewhere classified @ 20%
09 ENGINEERING > 0906 Electrical and Electronic Engineering > 090699 Electrical and Electronic Engineering not elsewhere classified @ 10%
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