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International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 865184, 9 pages
http://dx.doi.org/10.1155/2012/865184
Research Article

Improving Accuracy for 3D RFID Localization

1School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2School of Software, TNLIST, Tsinghua University, Beijing 100084, China
3Department of Computer Science and Engineering, HKUST, Kowloon, Hong Kong

Received 15 December 2011; Accepted 4 February 2012

Academic Editor: Mo Li

Copyright © 2012 Jinsong Han et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Radio Frequency Identification (RFID) becomes a prevalent labeling and localizing technique in the recent years. Deploying indoor RFID localization systems facilitates many applications. Previous approaches, however, are most based on 2D design and cannot provide 3D location information. The lack of one-dimensional information may lead 2D-based systems to inaccurate localization. In this paper, we develop an indoor 3D RFID localization system based on active tag array. In particular, we employ the geometric mean to filter the explicit 3D location information with high accuracy. The experimental results show that our system is efficient in tracking objects and improving the localization accuracy.