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Incremental Distributed Identification of Markov Random Field Models in Wireless Sensor Networks

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2 Author(s)
Oka, A. ; Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC ; Lampe, L.

Wireless sensor networks (WSNs) comprise of highly power constrained nodes that observe a hidden natural field and reconstruct it at a distant data fusion center. Algorithmic strategies for extending the lifetime of such networks invariably require a knowledge of the statistical model of the underlying field. Since centralized model identification is communication intensive and eats into any potential power savings, we present a stochastic recursive identification algorithm which can be implemented in a fully distributed and scalable manner within the network. We demonstrate that it consumes modest resources relative to centralized estimation, and is stable, unbiased, and asymptotically efficient.

Published in:

Signal Processing, IEEE Transactions on  (Volume:57 ,  Issue: 6 )

Date of Publication:

June 2009

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