Clock Offset Estimation in Wireless Sensor Networks Using Bootstrap Bias Correction
Conference Paper
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Overview
abstract
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Wireless sensor networks have become an important and promising research area during the last recent years. Clock synchronization is one of the areas that play a crucial role in the design, implementation, and operation of wireless sensor networks. Under the assumption that there is no clock skew between sensor nodes, the Maximum Likelihood Estimate (MLE) of clock offset was proved by [1] for clock synchronization protocols that assume exponential random delays and a two-way message exchange mechanism such as TPSN (Timing-sync Protocol for Sensor Networks [2]). This MLE is asymptotically unbiased. However, the estimator is biased in the presence of a finite number of samples and much more biased in asymmetric random delay models, where the upstream delay characteristics are different from the downstream delay characteristics, and thus its performance is deteriorated. This paper proposes clock offset estimators based on the bootstrap bias correction approach, which estimates and corrects the bias of the MLE in the exponential delay model, and hence it results in better performances in mean squared error (MSE). © 2008 Springer Berlin Heidelberg.
published proceedings
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WIRELESS ALGORITHMS, SYSTEMS, AND APPLICATIONS, PROCEEDINGS
author list (cited authors)
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Lee, J., Kim, J., & Serpedin, E
complete list of authors
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Lee, Jaehan||Kim, Jangsub||Serpedin, Erchin
editor list (cited editors)
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Li, Y., Huynh, D. T., Das, S. K., & Du, D.
publication date
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Research
keywords
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Bias Correction
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Bootstrap
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Clock Synchronization
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Wireless Sensor Networks
Identity
Digital Object Identifier (DOI)
International Standard Book Number (ISBN) 10
International Standard Book Number (ISBN) 13
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https://doi.org/10.1007/978-3-540-88582-5