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 language | English |
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Title of host publication | 2015 IEEE International Conference on Communications, ICC 2015 |
Publisher | IEEE |
Pages | 6646-6651 |
Number of pages | 6 |
ISBN (Electronic) | 9781467364324 |
ISBN (Print) | 9781467364317 |
DOIs | |
Publication status | Published - 9 Sept 2015 |
Externally published | Yes |
Event | IEEE International Conference on Communications, ICC 2015 - London, United Kingdom Duration: 8 Jun 2015 → 12 Jun 2015 |
Publication series
Name | IEEE International Conference on Communications |
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Volume | 2015-September |
ISSN (Print) | 1550-3607 |
Conference
Conference | IEEE International Conference on Communications, ICC 2015 |
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Country/Territory | United Kingdom |
City | London |
Period | 8/06/15 → 12/06/15 |
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