On clock offset estimation in wireless sensor networks with weibull distributed network delays

Aitzaz Ahmad, Amina Noor, Erchin Serpedin, Hazem Nounou, Mohamed Nounou

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

5 Citations (Scopus)

Abstract

We consider the problem of Maximum Likelihood (ML) estimation of clock parameters in a two-way timing exchange scenario where the random delays assume a Weibull distribution, which represents a more generalized model. The ML estimate of the clock offset for the case of exponential distribution was obtained earlier. Moreover, it was reported that when the fixed delay is known, MLE is not unique. We determine the uniformly minimum variance unbiased (UMVU) estimators for exponential distribution under such a scenario and produce biased estimators having lower MSE than UMVU for all values of clock offset. We then consider the case when shape parameter is greater than one and reduce the corresponding optimization problems to their equivalent convex forms, thus guaranteeing convergence to a global minimum.

Original languageEnglish
Title of host publicationProceedings - 2010 20th International Conference on Pattern Recognition, ICPR 2010
Pages2322-2325
Number of pages4
DOIs
Publication statusPublished - 18 Nov 2010
Event2010 20th International Conference on Pattern Recognition, ICPR 2010 - Istanbul, Turkey
Duration: 23 Aug 201026 Aug 2010

Publication series

NameProceedings - International Conference on Pattern Recognition
ISSN (Print)1051-4651

Other

Other2010 20th International Conference on Pattern Recognition, ICPR 2010
CountryTurkey
CityIstanbul
Period23/8/1026/8/10

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Keywords

  • Clock synchronization
  • Estimation
  • Sensor networks

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition

Cite this

Ahmad, A., Noor, A., Serpedin, E., Nounou, H., & Nounou, M. (2010). On clock offset estimation in wireless sensor networks with weibull distributed network delays. In Proceedings - 2010 20th International Conference on Pattern Recognition, ICPR 2010 (pp. 2322-2325). [5595743] (Proceedings - International Conference on Pattern Recognition). https://doi.org/10.1109/ICPR.2010.568