Improving the Accuracy of Ultrasound-Based Localisation Systems

Abstract. 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.

• Type: Conference
• Year: 2005
• Where: LOCA
• Authors: Hubert Piontek, Matthias Seyffer, Jörg Kaiser
• Keywords: Distance Measurements, LOCA 2005, Ultrasound Pulses, Update Rate