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Kaj Grønbæk

Indoor Positioning Using GPS Revisited

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  • Mikkel Baun Kjærgaard, Denmark
  • Henrik Blunck, Denmark
  • Torben Godsk, Denmark
  • Thomas Toftkjær, Denmark
  • Dan Lund Christensen, Alexandra Institutet A/S, Denmark
  • Kaj Grønbæk
  • Department of Computer Science
It has been considered a fact that GPS performs too poorly inside buildings to provide usable indoor positioning. We analyze results of a measurement campaign to improve on the understanding of indoor GPS reception characteristics. The results show that using state-of-the-art receivers GPS availability is good in many buildings with standard material walls and roofs. The measured root mean squared 2D positioning error was below five meters in wooden buildings and below ten meters in most of the investigated brick and concrete buildings. Lower accuracies, where observed, can be linked to either low signal-to-noise ratios, multipath phenomena or bad satellite constellation geometry. We have also measured the indoor performance of embedded GPS receivers in mobile phones which provided lower availability and accuracy than state-of-the-art ones. Finally, we consider how the GPS performance within a given building is dependent on local properties like close-by building elements and materials, number of walls, number of overlaying stories and surrounding buildings.
Original languageEnglish
Book seriesLecture Notes in Computer Science
Pages (from-to)38-56
Number of pages19
Publication statusPublished - 2010
EventThe 8th International Conference on Pervasive Computing - Helsinki, Finland
Duration: 17 May 201020 May 2010
Conference number: 8


ConferenceThe 8th International Conference on Pervasive Computing

Bibliographical note

Title of the vol.: Pervasive Computing. Proceedings. / Patrik Floréen, Antonio Krüger and Mirjana Spasojevic (eds.)
ISBN: 978-3-642-12653-6

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