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Published in:
2005 | OriginalPaper | Chapter
Improving the Accuracy of Ultrasound–Based Localisation Systems
Authors : Hubert Piontek, Matthias Seyffer, Jörg Kaiser
Published in: Location- and Context-Awareness
Publisher: Springer Berlin Heidelberg
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We present an improvement to ultrasound–based indoor location systems like Cricket [1]. By encoding and modulating the ultrasound pulses, we are able to achieve greater accuracy in distance measurements. Besides improving the distance measurements, we improve the position update rate by synchronizing the active beacons. We also propose a method that could further improve the update rate by superimposing encoded ultrasound pulses. Further, an experimental evaluation of our improvements is presented.