Joint Ranging and Clock Parameter Estimation by Wireless Round Trip Time Measurements
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
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.
Clock synchronization, range estimation, robust estimators, ultrawideband
IdentifiersURN: urn:nbn:se:kth:diva-176946DOI: 10.1109/JSAC.2015.2430521ISI: 000363238300010ScopusID: 2-s2.0-84945119871OAI: oai:DiVA.org:kth-176946DiVA: diva2:883210
QC 201512162015-12-162015-11-132015-12-16Bibliographically approved