@inproceedings{2006-iswc-pic, author={Henk L Muller and Cliff Randell and Andrew Moss}, title={A 10mW Wearable Positioning System}, booktitle={International Symposium on Wearable Computing (ISWC) 2006}, ISBN={1-4244-0597-1}, publisher={IEEE}, pages={47--50}, month={October}, year={2006}, 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.}, abstract-url={http://www.cs.bris.ac.uk/Publications/pub_master.jsp?id=2000596}, keyword={Program Analysis,Program Transformation,Wearables}, pubtype={102} }