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Scalable and Passive Wireless Network Clock Synchronization in LOS Environments
KTH, School of Electrical Engineering (EES), Information Science and Engineering.
KTH, School of Electrical Engineering (EES), Information Science and Engineering.
2017 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 16, no 6, 3536-3546 p., 7880672Article 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
Institute of Electrical and Electronics Engineers (IEEE), 2017. Vol. 16, no 6, 3536-3546 p., 7880672
Keyword [en]
nanosecond accuracy, wireless localization, Wireless time synchronization
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-210601DOI: 10.1109/TWC.2017.2683486ISI: 000403495400035Scopus ID: 2-s2.0-85020841579OAI: oai:DiVA.org:kth-210601DiVA: diva2:1118962
Funder
Swedish Research Council, 621-2014-5874 2016-06079
Note

QC 20170703

Available from: 2017-07-03 Created: 2017-07-03 Last updated: 2017-07-03Bibliographically approved

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Dwivedi, SatyamHändel, Peter
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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
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More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
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