Accurate tracking using TOA in sensor networks

Localisation and tracking of nodes in wireless sensor networks is valuable in many applications, and is the primary purpose of the network in applications such as for monitoring emergency service personnel and athletes for performance monitoring. Performing high accuracy tracking using low-cost hardware in difficult radio propagation environments is extremely challenging, and the CSIRSO WASP system was designed to meet this challenge. In this paper results are presented of trials of the WASP system for monitoring cyclists that were conducted with the Australian Institute of Sport. The results show that the system has an absolute and relative error less than 0.33 m for 95% of the measurements.