Time-varying clock offset estimation in two-way timing message exchange in wireless sensor networks using factor graphs

Aitzaz Ahmad, Davide Zennaro, Erchin Serpedin, Lorenzo Vangelista

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

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.

Original languageEnglish
Title of host publication2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012 - Proceedings
Pages3113-3116
Number of pages4
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012 - Kyoto, Japan
Duration: 25 Mar 201230 Mar 2012

Other

Other2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012
CountryJapan
CityKyoto
Period25/3/1230/3/12

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Keywords

  • Clock offset
  • factor graphs
  • max-product algorithm
  • message passing

ASJC Scopus subject areas

  • Signal Processing
  • Software
  • Electrical and Electronic Engineering

Cite this

Ahmad, A., Zennaro, D., Serpedin, E., & Vangelista, L. (2012). Time-varying clock offset estimation in two-way timing message exchange in wireless sensor networks using factor graphs. In 2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012 - Proceedings (pp. 3113-3116). [6288574] https://doi.org/10.1109/ICASSP.2012.6288574