Improving accuracy for range-based localization in multiple target wireless sensor networks

Authors:
Oscar Rodríguez;Tomoaki Ohtsuki
Affiliations:
School of Science for Open and Environmental Systems, Graduate School of Science and Technology, Keio University, Yokohama, Japan;Department of Information and Computer Science, Faculty of Science and Technology, Keio University, Yokohama, Japan
Venue:
ISRN Communications and Networking
Year:
2011

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Abstract

We introduce a system for multiple target range-based localization systems, such as those based on time-of-arrival (TOA) and received signal strength indicator (RSSI) for distance measurement estimations. In order to improve the accuracy of the location estimation for all target nodes, our system makes use of distance estimations between target nodes as well as between anchor and target nodes, and weights for all nodes. We propose variations on two popular localization algorithms and compare their accuracy against that of the conventional algorithms using simulations and experiments. Our results show that our proposal consistently offers a better localization accuracy than the conventional algorithms.