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A 10mW Wearable Positioning System

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3 Author(s)
Muller, H. ; Mobile & Wearable Comput. group, Bristol Univ., Bristol ; Randell, Cliff ; Moss, A.

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.

Published in:

Wearable Computers, 2006 10th IEEE International Symposium on

Date of Conference:

11-14 Oct. 2006

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