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2006 10th IEEE International Symposium on Wearable Computers (2006)
Montreux, Switzerland
Oct. 11, 2006 to Oct. 14, 2006
ISSN: 1550-4816
ISBN: 1-4244-0597-1
pp: 47-50
Henk Muller , Mobile and Wearable Computing group, University of Bristol
Cliff Randell , Mobile and Wearable Computing group, University of Bristol
Andrew Moss , Mobile and Wearable Computing group, University of Bristol
ABSTRACT
In this paper we present a wearable positioning system that requires less than 10 mW to operate. The system consists of an infrastructure of ultrasonic transmitting devices, and a receiver device on the wearable. The receiver comprises an ultrasonic pick-up, an op-amp, and a PIC. The PIC implements a particle filter for estimating X and Y positions, which is robust in an environment with limited precision. We have modified the traditional particle filter in order to operate on a micro-controller with limited memory capabilities. The number of particles is only limited by the amount of memory on the PIC; we only use 5% of the PIC's computational power.
INDEX TERMS
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CITATION

C. Randell, H. Muller and A. Moss, "A 10mW Wearable Positioning System," 2006 10th IEEE International Symposium on Wearable Computers(ISWC), Montreux, Switzerland, 2006, pp. 47-50.
doi:10.1109/ISWC.2006.286341
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