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

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

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

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