Joint sequential target state estimation and clock synchronization in wireless sensor networks

Jichuan Li; Arye Nehorai

doi:10.1109/ACSSC.2014.7094500

Joint sequential target state estimation and clock synchronization in wireless sensor networks

Jichuan Li, Arye Nehorai

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

Clock synchronization is crucial to a wireless sensor network but often difficult to maintain. In this paper, we propose a joint estimation method to estimate both target states and clock synchronization status based on sensor observations from an unsynchronized wireless sensor network. We build a multi-sensor state-space model to connect clock synchronization status with sequential state transition. We use the expectation-maximization algorithm, together with Monte Carlo approximations, for joint estimation. Numerical examples show that the proposed method converges to the true synchronization status and improves the accuracy of sequential state estimation by considering the synchronization status.

Original language	English
Title of host publication	Conference Record of the 48th Asilomar Conference on Signals, Systems and Computers
Editors	Michael B. Matthews
Publisher	IEEE Computer Society
Pages	525-529
Number of pages	5
ISBN (Electronic)	9781479982974
DOIs	https://doi.org/10.1109/ACSSC.2014.7094500
State	Published - Apr 24 2015
Event	48th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015 - Pacific Grove, United States Duration: Nov 2 2014 → Nov 5 2014

Publication series

Name	Conference Record - Asilomar Conference on Signals, Systems and Computers
Volume	2015-April
ISSN (Print)	1058-6393

Conference

Conference	48th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015
Country/Territory	United States
City	Pacific Grove
Period	11/2/14 → 11/5/14

Keywords

EM algorithm
Monte Carlo approximation
Wireless sensor network
clock synchronization
joint state and parameter estimation
sequential state estimation

Access to Document

10.1109/ACSSC.2014.7094500

Cite this

Li, J., & Nehorai, A. (2015). Joint sequential target state estimation and clock synchronization in wireless sensor networks. In M. B. Matthews (Ed.), Conference Record of the 48th Asilomar Conference on Signals, Systems and Computers (pp. 525-529). Article 7094500 (Conference Record - Asilomar Conference on Signals, Systems and Computers; Vol. 2015-April). IEEE Computer Society. https://doi.org/10.1109/ACSSC.2014.7094500

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title = "Joint sequential target state estimation and clock synchronization in wireless sensor networks",

abstract = "Clock synchronization is crucial to a wireless sensor network but often difficult to maintain. In this paper, we propose a joint estimation method to estimate both target states and clock synchronization status based on sensor observations from an unsynchronized wireless sensor network. We build a multi-sensor state-space model to connect clock synchronization status with sequential state transition. We use the expectation-maximization algorithm, together with Monte Carlo approximations, for joint estimation. Numerical examples show that the proposed method converges to the true synchronization status and improves the accuracy of sequential state estimation by considering the synchronization status.",

keywords = "EM algorithm, Monte Carlo approximation, Wireless sensor network, clock synchronization, joint state and parameter estimation, sequential state estimation",

author = "Jichuan Li and Arye Nehorai",

note = "Publisher Copyright: {\textcopyright} 2014 IEEE.; 48th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015 ; Conference date: 02-11-2014 Through 05-11-2014",

year = "2015",

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doi = "10.1109/ACSSC.2014.7094500",

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Li, J & Nehorai, A 2015, Joint sequential target state estimation and clock synchronization in wireless sensor networks. in MB Matthews (ed.), Conference Record of the 48th Asilomar Conference on Signals, Systems and Computers., 7094500, Conference Record - Asilomar Conference on Signals, Systems and Computers, vol. 2015-April, IEEE Computer Society, pp. 525-529, 48th Asilomar Conference on Signals, Systems and Computers, ACSSC 2015, Pacific Grove, United States, 11/2/14. https://doi.org/10.1109/ACSSC.2014.7094500

Joint sequential target state estimation and clock synchronization in wireless sensor networks. / Li, Jichuan; Nehorai, Arye.
Conference Record of the 48th Asilomar Conference on Signals, Systems and Computers. ed. / Michael B. Matthews. IEEE Computer Society, 2015. p. 525-529 7094500 (Conference Record - Asilomar Conference on Signals, Systems and Computers; Vol. 2015-April).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

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N2 - Clock synchronization is crucial to a wireless sensor network but often difficult to maintain. In this paper, we propose a joint estimation method to estimate both target states and clock synchronization status based on sensor observations from an unsynchronized wireless sensor network. We build a multi-sensor state-space model to connect clock synchronization status with sequential state transition. We use the expectation-maximization algorithm, together with Monte Carlo approximations, for joint estimation. Numerical examples show that the proposed method converges to the true synchronization status and improves the accuracy of sequential state estimation by considering the synchronization status.

AB - Clock synchronization is crucial to a wireless sensor network but often difficult to maintain. In this paper, we propose a joint estimation method to estimate both target states and clock synchronization status based on sensor observations from an unsynchronized wireless sensor network. We build a multi-sensor state-space model to connect clock synchronization status with sequential state transition. We use the expectation-maximization algorithm, together with Monte Carlo approximations, for joint estimation. Numerical examples show that the proposed method converges to the true synchronization status and improves the accuracy of sequential state estimation by considering the synchronization status.

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KW - Monte Carlo approximation

KW - Wireless sensor network

KW - clock synchronization

KW - joint state and parameter estimation

KW - sequential state estimation

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Li J, Nehorai A. Joint sequential target state estimation and clock synchronization in wireless sensor networks. In Matthews MB, editor, Conference Record of the 48th Asilomar Conference on Signals, Systems and Computers. IEEE Computer Society. 2015. p. 525-529. 7094500. (Conference Record - Asilomar Conference on Signals, Systems and Computers). doi: 10.1109/ACSSC.2014.7094500

Joint sequential target state estimation and clock synchronization in wireless sensor networks

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