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Challenges for RF two-way time-of-flight ranging in wireless sensor networks
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.ORCID iD: 0000-0002-8382-0359
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
Autonomous Systems Laboratory, ICT Centre, CSIRO, Brisbane, Australia.
2012 (English)In: Proceedings - Conference on Local Computer Networks, LCN, IEEE conference proceedings, 2012, p. 908-916Conference paper, Published paper (Refereed)
Abstract [en]

In applications where a priori determination of location is infeasible, node localization schemes are desirable, which allow the node to estimate its location during network operation. The majority of these schemes are based on ranging between node pairs, which should ideally be performed without adding cost or size to the sensor node. Two-way time-of-flight schemes can fulfill this desire, by utilizing the measurement of the time-of-flight of electromagnetic waves to determine the distance between two sensor nodes. In this paper, we present the implementation and analysis of such a ranging scheme. Because a small error in time measurement can result in a large distance estimation error, the focus of this work lies on the determination and analysis of influencing factors, which limit the accuracy of round-trip-time measurements. We analyze two main contributing factors to the accuracy of the ranging scheme, namely the radio transceiver clock quantization and the link quality during round-trip-time measurement. These effects and their impact on the overall ranging error have been investigated by means of simulation and experimentation. Initial ranging errors as large as 24 m RMS were observed, which could be reduced to errors between 5 and 8 m RMS by utilizing compensation techniques.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2012. p. 908-916
Series
Proceedings - Conference on Local Computer Networks, LCN
Keywords [en]
Clock quantization; Compensation techniques; Contributing factor; Distance estimation; Initial ranging; Link quality; Network operations; Node localization; Node pairs; Radio transceivers; Ranging errors; Round-trip-time measurements; Time of flight
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-18644DOI: 10.1109/LCNW.2012.6424081ISI: 000318619100035Scopus ID: 2-s2.0-84874296096ISBN: 9781467321297 (print)OAI: oai:DiVA.org:miun-18644DiVA, id: diva2:613547
Conference
2012 IEEE 37th Conference on Local Computer Networks Workshops, LCN Workshops 2012;Clearwater, FL;22 October 2012through25 October 2012;Category numberCFP1225T-ART;Code95765
Note

Art. No.: 6424081

Available from: 2013-03-28 Created: 2013-03-27 Last updated: 2016-09-29Bibliographically approved

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Bader, SebastianOelmann, Bengt

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