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Energy-Efficient Target Tracking in Wireless Sensor Networks: A Quantized Measurement Fusion Framework

Yan Zhou,Dongli Wang,Tingrui Pei,Y. Lan

Published 2014 in Int. J. Distributed Sens. Networks

ABSTRACT

Optimizing the design of tracking system under energy and bandwidth constraints in wireless sensor networks (WSN) is of paramount importance. In this paper, the problem of collaborative target tracking in WSNs is considered in a framework of quantized measurement fusion. First, the measurement in each local sensor is quantized by probabilistic quantization scheme and transmitted to a fusion center (FC). Then, the quantized messages are fused and sequential importance resampling (SIR) particle filtering is employed to estimate the target state. In the FC, quantized measurement fusion via both augmented approach and weighted approach is investigated. For both approaches, the closed-form solution to the optimization problem of bandwidth scheduling is given, where the total energy consumption is minimized subject to a constraint on the fusion performance. Finally, posterior Cramer-Rao lower bounds (CRLBs) on the tracking accuracy using quantized measurement fusion are derived. Simulation results reveal that both approaches perform very closely to the posterior CRLB while obtaining average communication energy saving up to 72.8% and 45.1%, respectively.

PUBLICATION RECORD

  • Publication year

    2014

  • Venue

    Int. J. Distributed Sens. Networks

  • Publication date

    2014-02-01

  • Fields of study

    Computer Science, Engineering

  • Identifiers
    DOI 10.1155/2014/682032
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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