Optimal power allocation for distributed detection in wireless sensor networks

Xin Zhang, H. Vincent Poor, Mung Chiang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In distributed detection systems with wireless sensor networks, communication between sensors and a fusion center is not perfect due to interference and limited communication power of the sensors to combat noise. The problem of optimizing detection performance with imperfect communication between the sensors and the fusion center over wireless channels brings a new challenge to distributed detection. In this paper, a distributed detection system infrastructure is provided, and a multiaccess channel model is included to account for imperfect communication between the sensors and the fusion center. The J-divergence between the distributions of the detection statistic under different hypotheses is used as a performance criterion in order to provide a tractable analysis. Optimizing the performance (in terms of the J-divergence) under a total communication power constraint on the sensors is studied, and the corresponding optimal power allocation scheme is provided. It is interesting to see that, for the case with orthogonal channels, the power allocation can be solved by a weighted water-filling algorithm. Numerical results are used to illustrate the solution.

Original languageEnglish (US)
Title of host publication44th Annual Allerton Conference on Communication, Control, and Computing 2006
PublisherUniversity of Illinois at Urbana-Champaign, Coordinated Science Laboratory and Department of Computer and Electrical Engineering
Pages1048-1057
Number of pages10
ISBN (Electronic)9781604237924
StatePublished - Jan 1 2006
Event44th Annual Allerton Conference on Communication, Control, and Computing 2006 - Monticello, United States
Duration: Sep 27 2006Sep 29 2006

Publication series

Name44th Annual Allerton Conference on Communication, Control, and Computing 2006
Volume3

Other

Other44th Annual Allerton Conference on Communication, Control, and Computing 2006
CountryUnited States
CityMonticello
Period9/27/069/29/06

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Computer Networks and Communications

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  • Cite this

    Zhang, X., Poor, H. V., & Chiang, M. (2006). Optimal power allocation for distributed detection in wireless sensor networks. In 44th Annual Allerton Conference on Communication, Control, and Computing 2006 (pp. 1048-1057). (44th Annual Allerton Conference on Communication, Control, and Computing 2006; Vol. 3). University of Illinois at Urbana-Champaign, Coordinated Science Laboratory and Department of Computer and Electrical Engineering.