Estimation of spatially distributed processes in wireless sensor networks with random packet loss
Pages 3162 - 3171
Abstract
This paper studies the effect of wireless channel imperfections on the transport and estimation of spatially distributed events using wireless sensor networks (WSNs). It is observed that the quality of event estimation at the sink (fusion center) degrades considerably with correlated packet losses during transmission from the sensors. A novel diversity technique based on field estimation is proposed to mitigate the effects of packet losses on the quality of estimation at the sink. Dense deployment of sensor nodes and the spatial nature of the observed physical phenomenon result in the sensor observations being noisy spatial samples of an unknown underlying function. The proposed algorithm exploits this feature, using supervised learning to achieve diversity. A new information fusion methodology based on approximate likelihood is proposed to integrate the information obtained from the learning algorithm into the classical estimation framework. Simulation results are provided to demonstrate the performance of the proposed approach.
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- Estimation of spatially distributed processes in wireless sensor networks with random packet loss
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Copyright © 2009.
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IEEE Press
Publication History
Published: 01 June 2009
Accepted: 02 February 2009
Revised: 25 November 2008
Received: 25 June 2008
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