Title :
Range-Only Tracking in Multipath Environments - An Algorithm Based on Particle Filtering
Author :
Sathyan, Thuraiappah ; Hedley, M.
Author_Institution :
ICT Center, CSIRO, Marsfield, NSW, Australia
Abstract :
In complex propagation environments with multipath reflections determining the time-of-arrival (TOA) of the line-of-sight (LoS) signal, which is required for localization, is challenging. As a result the localization accuracy of TOA-based systems degrade in such environments. We are pursuing a novel approach where the TOA algorithm returns not one but multiple candidate TOA values as this list is more likely to contain the LoS TOA value and the localization algorithm uses all of these to form a more reliable estimate of the node location. In this paper we present a new algorithm for localization and tracking based on multiple candidate TOA values from each anchor. We show that this is similar to the well-known data association problem in target tracking and exploit this similarity to propose a particle filter based algorithm that has linear computational complexity in the number of anchors. The performance of the algorithm is validated using simulated data.
Keywords :
particle filtering (numerical methods); sensor fusion; sensor placement; target tracking; time-of-arrival estimation; wireless sensor networks; data association problem; line-of-sight signal time-of-arrival; localization algorithm; multipath environment; multipath reflection; particle filtering; range-only tracking; target tracking; Australia; Filtering algorithms; Global Positioning System; Particle filters; Particle tracking; Signal processing algorithms; Signal resolution; Target tracking; Time of arrival estimation; Wireless sensor networks;
Conference_Titel :
Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-4148-8
DOI :
10.1109/GLOCOM.2009.5425331