Joint synchronization and localization based on Gaussian belief propagation in sensor networks

Weijie YUAN, Nan WU*, Hua WANG, Bin LI, Jingming KUANG

*Corresponding author for this work

Research output: Book Chapters | Papers in Conference ProceedingsConference paper (refereed)Researchpeer-review

7 Citations (Scopus)

Abstract

In wireless sensor networks, acquiring accurate timing information is a crucial requirement for time-based sensor localization. Utilizing a joint localization and synchronization method in sensor networks can improve positioning speed and accuracy. In this paper, we present a unified factor graph framework based on time of arrival (TOA) measurements to solve the problem of joint localization and time synchronization. A novel distributed cooperative joint estimation method based on belief propagation (BP) is proposed. We linearize the nonlinear terms in messages on factor graph in order to obtain a closed Gaussian form solution of message update. Accordingly, only the means and variances have to be updated and transmitted, which significantly reduce the communication overhead and computational complexity. To further reduce the communication overhead, we propose a message passing schedule. Simulation results show that the proposed BP method reach close performance to particle-based approaches with lower complexity.

Original languageEnglish
Title of host publication2015 IEEE International Conference on Communications, ICC 2015
PublisherIEEE
Pages6646-6651
Number of pages6
ISBN (Electronic)9781467364324
ISBN (Print)9781467364317
DOIs
Publication statusPublished - 9 Sept 2015
Externally publishedYes
EventIEEE International Conference on Communications, ICC 2015 - London, United Kingdom
Duration: 8 Jun 201512 Jun 2015

Publication series

NameIEEE International Conference on Communications
Volume2015-September
ISSN (Print)1550-3607

Conference

ConferenceIEEE International Conference on Communications, ICC 2015
Country/TerritoryUnited Kingdom
CityLondon
Period8/06/1512/06/15

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

Keywords

  • Belief Propagation
  • Cooperative Joint Localization and Synchronization
  • Factor Graph
  • Gaussian Message Representation
  • Message Passing Schedule
  • Wireless Sensor Network

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