Resource optimisation in a wireless sensor network with guaranteed estimator performance

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Resource optimisation in a wireless sensor network with guaranteed estimator performance

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New control paradigms are needed for large networks of wireless sensors and actuators in order to efficiently utilise system resources. In this study, the authors consider the problem of discrete-time state estimation over a wireless sensor network. Given a tree that represents the sensor communications with the fusion centre, the authors derive the optimal estimation algorithm at the fusion centre, and provide a closed-form expression for the steady-state error covariance matrix. They then present a tree reconfiguration algorithm that produces a sensor tree that has low overall energy consumption and guarantees a desired level of estimation quality at the fusion centre. The authors further propose a sensor tree construction and scheduling algorithm that leads to a longer network lifetime than the tree reconfiguration algorithm. Examples are provided throughout the paper to demonstrate the algorithms and theory developed.

Inspec keywords: discrete time systems; wireless sensor networks; state estimation; scheduling; covariance matrices

Other keywords: steady-state error covariance matrix; wireless sensor network; scheduling algorithm; discrete-time state estimation; resource optimisation; tree reconfiguration algorithm

Subjects: Wireless sensor networks; Control applications in radio and radar; Algebra; Discrete control systems; Algebra

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