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State Estimation Over Sensor Networks With Correlated Wireless Channels
School of Electrical Engineering & Computer Science, The University of Newcastle, Newcastle, Australien.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Signals and Systems Group.
KTH, Stockholm.
2013 (English)In: IEEE Transactions on Automatic Control, ISSN 0018-9286, E-ISSN 1558-2523, Vol. 58, no 3, 581-593 p.Article in journal (Refereed) Published
Abstract [en]

Stochastic stability for centralized time-varying Kalman filtering over a wireless sensor network with correlated fading channels is studied. On their route to the gateway, sensor packets, possibly aggregated with measurements from several nodes, may be dropped because of fading links. To study this situation, we introduce a network state process, which describes a finite set of configurations of the radio environment. The network state characterizes the channel gain distributions of the links, which are allowed to be correlated between each other. Temporal correlations of channel gains are modeled by allowing the network state process to form a (semi-)Markov chain. We establish sufficient conditions that ensure the Kalman filter to be exponentially bounded. In the one-sensor case, this new stability condition is shown to include previous results obtained in the literature as special cases. The results also hold when using power and bit-rate control policies, where the transmission power and bit-rate of each node are nonlinear mapping of the network state and channel gains.

Place, publisher, year, edition, pages
2013. Vol. 58, no 3, 581-593 p.
Keyword [en]
Kalman filtering, packet drops, sensor networks, stability
National Category
Engineering and Technology
Research subject
Electrical Engineering with specialization in Signal Processing
URN: urn:nbn:se:uu:diva-199477DOI: 10.1109/TAC.2012.2212515ISI: 000316806400003OAI: oai:DiVA.org:uu-199477DiVA: diva2:620137
Available from: 2013-05-07 Created: 2013-05-06 Last updated: 2013-06-17Bibliographically approved

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