Time-varying clock offset estimation in two-way timing message exchange in wireless sensor networks using factor graphs
Conference Paper
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Overview
abstract
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The problem of clock offset estimation in a two-way timing exchange regime is considered when the likelihood function of the observation time stamps is exponentially distributed. In order to capture the imperfections in node oscillators, which render a time-varying nature to the clock offset, a novel Bayesian approach to the clock offset estimation is proposed using a factor graph representation of the posterior density. Message passing using the max-product algorithm yields a closed form expression for the Bayesian inference problem. © 2012 IEEE.
name of conference
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ICASSP 2012 - 2012 IEEE International Conference on Acoustics, Speech and Signal Processing
published proceedings
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2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
author list (cited authors)
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Ahmad, A., Zennaro, D., Serpedin, E., & Vangelista, L
citation count
complete list of authors
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Ahmad, Aitzaz||Zennaro, Davide||Serpedin, Erchin||Vangelista, Lorenzo
publication date
publisher
published in
Research
keywords
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Clock Offset
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Factor Graphs
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Max-product Algorithm
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Message Passing
Identity
Digital Object Identifier (DOI)
International Standard Book Number (ISBN) 13
Additional Document Info
Other
URL
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http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6268628