Energy-aware distributed tracking in wireless sensor networks

K-REx Repository

Show simple item record Roseveare, Nicholas J. Balasubramaniam, Natarajan 2011-06-27T20:59:58Z 2011-06-27T20:59:58Z 2011-06-27
dc.description.abstract We consider a wireless sensor network engaged in the task of distributed tracking. Here, multiple remote sensor nodes estimate a physical process (for example, a moving object) and transmit quantized estimates to a fusion center for processing. At the fusion node a BLUE (Best Linear Unbiased Estimation) approach is used to combine the sensor estimates and create a final estimate of the state. In this framework, the uncertainty of the overall estimate is derived and shown to depend on the individual sensor transmit energy and quantization levels. Since power and bandwidth are critically constrained resources in battery operated sensor nodes, we attempt to quantify the trade-off between the lifetime of the network and the estimation quality over time. A unique feature of this work is that instead of merely allowing a greedy minimization of uncertainty in each time instance, the lifetime of the wireless sensor network is improved by incorporating a heuristic scaling on the operating capability of each node. This heuristic in turn depends on the remaining energy, equivalent to the past history of power and quantization decisions. Simulation results demonstrate the quality of the state estimate as well as the extended lifetime of the network when power and quantization levels are dynamically updated. en_US
dc.relation.isPartOf K-State Research Forum en_US
dc.subject Distributed estimation en_US
dc.subject Wireless sensor networks en_US
dc.subject Convex optimization en_US
dc.title Energy-aware distributed tracking in wireless sensor networks en_US
dc.type Poster en_US 2011 en_US
dc.description.conference 16th Annual K-State Research Forum, Kansas State University, Manhattan, KS, April 20, 2011 en_US
dc.contributor.authoreid nickrose en_US
dc.contributor.authoreid bala en_US

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search K-REx

Advanced Search


My Account


Center for the

Advancement of Digital