2018 Symposium on Information Theory and Signal Processing in the Benelux, Date: 2018/05/31 - 2018/06/01, Location: University of Twente, Enschede, The Netherlands
Proceedings of the 2018 Symposium on Information Theory and Signal Processing in the Benelux
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Abstract:
Interference due to ambient noise is an important aspect in precise and accurate, ultrasonic distance measurements. In indoor positioning, interference can modify or disrupt a signal that is travelling along a channel between source and receiver, resulting in false or even the absence of a distance measurement. This paper introduces an ultrasonic recording circuit based on Microelectromechanical Systems (MEMS), to analyze whether it is possible to bypass the potential ambient ultrasonic noise sources in office and household environments. Measurements with this system show the sonic spectrum up to 200 kHz of several everyday objects. The results of these measurements are of great importance towards future exploration of ultrasonic positioning.