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Scalable and Passive Wireless Network Clock Synchronization in LOS Environments
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Automatic control.
KTH Royal Inst Technol, Dept Elect Engn, SE-10044 Stockholm, Sweden..
KTH Royal Inst Technol, Dept Elect Engn, SE-10044 Stockholm, Sweden..
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Automatic control.
2017 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 16, no 6, 3536-3546 p.Article in journal (Refereed) Published
Abstract [en]

Clock synchronization is ubiquitous in wireless systems for communication, sensing, and control. In this paper, we design a scalable system in which an indefinite number of passively receiving wireless units can synchronize to a single master clock at the level of discrete clock ticks. Accurate synchronization requires an estimate of the node positions to compensate the time-of-flight transmission delay in line-of-sight environments. If such information is available, the framework developed here takes position uncertainties into account. In the absence of such information, as in indoor scenarios, we propose an auxiliary localization mechanism. Furthermore, we derive the Cramer-Rao bounds for the system, which show that it enables synchronization accuracy at sub-nanosecond levels. Finally, we develop and evaluate an online estimation method, which is statistically efficient.

Place, publisher, year, edition, pages
2017. Vol. 16, no 6, 3536-3546 p.
Keyword [en]
Wireless time synchronization, wireless localization, nanosecond accuracy
National Category
Communication Systems Telecommunications
Identifiers
URN: urn:nbn:se:uu:diva-329726DOI: 10.1109/TWC.2017.2683486ISI: 000403495400035OAI: oai:DiVA.org:uu-329726DiVA: diva2:1143349
Funder
Swedish Research Council, 621-2014-5874Swedish Research Council, 2016-06079
Available from: 2017-09-21 Created: 2017-09-21 Last updated: 2017-09-21Bibliographically approved

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Zachariah, DaveStoica, Peter

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