Title :
On joint synchronization of clock offset and skew for Wireless Sensor Networks under exponential delay
Author :
Leng, Mei ; Wu, Yik-Chung
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China
fDate :
May 30 2010-June 2 2010
Abstract :
In this paper, the problem of clock synchronization for Wireless Sensor Network (WSN) under exponential delay is analyzed based on two-way message exchange mechanism. The Maximum Likelihood Estimator (MLE) for joint estimation of the clock offset and clock skew is derived, and an approximate Cramer-Rao Lower Bound (CRLB) is also developed. Simulation results verify that the proposed estimator gives improved performance compared to an existing algorithm.
Keywords :
clocks; maximum likelihood estimation; synchronisation; wireless sensor networks; CRLB; Cramer-Rao lower bound; WSN; clock offset synchronization; clock skew; exponential delay; maximum likelihood estimator; wireless sensor networks; Clocks; Condition monitoring; Delay effects; Delay estimation; Frequency synchronization; Industrial control; Maximum likelihood estimation; Random variables; Timing; Wireless sensor networks;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5537647
