TIME-VARYING CLOCK OFFSET ESTIMATION IN TWO-WAY TIMING MESSAGE EXCHANGE IN WIRELESS SENSOR NETWORKS USING FACTOR GRAPHS Conference Paper

abstract

• 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

• 2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

authors

• Serpedin, Erchin

published proceedings

• 2012 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP)

author list (cited authors)

• Ahmad, A., Zennaro, D., Serpedin, E., & Vangelista, L.

citation count

• 8

complete list of authors

• Ahmad, Aitzaz||Zennaro, Davide||Serpedin, Erchin||Vangelista, Lorenzo

publication date

• March 2012

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• Proceedings of the ... IEEE International Conference on Acoustics, Speech, and Signal Processing / sponsored by the Institute of Electrical and Electronics Engineers Signal Processing Society. ICASSP (Conference)  Journal

keywords

• Clock Offset
• Factor Graphs
• Max-product Algorithm
• Message Passing

Digital Object Identifier (DOI)

• 10.1109/icassp.2012.6288574

International Standard Book Number (ISBN) 13

• 9781467300469

start page

• 3113

end page

• 3116

URL

• http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6268628