TIME-VARYING CLOCK OFFSET ESTIMATION IN TWO-WAY TIMING MESSAGE EXCHANGE IN WIRELESS SENSOR NETWORKS USING FACTOR GRAPHS
Additional Document Info
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)