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Joint Ranging and Clock Parameter Estimation by Wireless Round Trip Time Measurements
KTH, School of Electrical Engineering (EES), Signal Processing.ORCID iD: 0000-0001-7450-8681
KTH, School of Electrical Engineering (EES), Signal Processing.ORCID iD: 0000-0002-2718-0262
2015 (English)In: IEEE Journal on Selected Areas in Communications, ISSN 0733-8716, E-ISSN 1558-0008, Vol. 33, no 11, 2379-2390 p.Article in journal (Refereed) Published
Abstract [en]

In this paper, we develop a new technique for estimating fine clock errors and range between two nodes simultaneously by two-way time-of-arrival measurements using impulse-radio ultrawideband signals. Estimators for clock parameters and the range are proposed, which are robust with respect to outliers. They are analyzed numerically and by means of experimental measurement campaigns. The technique and derived estimators achieve accuracies below 1 Hz for frequency estimation, below 1 ns for phase estimation, and 20 cm for range estimation, at a 4-m distance using 100-MHz clocks at both nodes. Therefore, we show that the proposed joint approach is practical and can simultaneously provide clock synchronization and positioning in an experimental system.

Place, publisher, year, edition, pages
IEEE Press, 2015. Vol. 33, no 11, 2379-2390 p.
Keyword [en]
Clock synchronization, range estimation, robust estimators, ultrawideband
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-176946DOI: 10.1109/JSAC.2015.2430521ISI: 000363238300010ScopusID: 2-s2.0-84945119871OAI: oai:DiVA.org:kth-176946DiVA: diva2:883210
Note

QC 20151216

Available from: 2015-12-16 Created: 2015-11-13 Last updated: 2015-12-16Bibliographically approved

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Dwivedi, SatyamHändel, Peter
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