On the Joint Synchronization of Clock Offset and Skew in RBS-Protocol |
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Authors: | Sari I Serpedin E Kyoung-Lae Noh Chaudhari Q Suter B |
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Affiliation: | Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX; |
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Abstract: | Motivated by the necessity of having a good clock synchronization amongst the nodes of wireless ad-hoc sensor networks, the joint maximum likelihood (JML) estimator for clock phase offset and skew under exponential noise model for reference broadcast synchronization (RBS) protocol is formulated and found via a direct algorithm. The Gibbs sampler is also proposed for joint clock phase offset and skew estimation and shown to provide superior performance relative to JML- estimator. Lower and upper bounds for the mean-square errors (MSE) of JML-estimator and Gibbs Sampler are introduced in terms of the MSE of the uniform minimum variance unbiased (UMVU) estimator and the conventional best linear unbiased estimator (BLUE), respectively. |
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