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Reducing localization ambiguity of immobile passive UHF RFID tagged physical objects

Title
Reducing localization ambiguity of immobile passive UHF RFID tagged physical objects
Authors
Choi, Jae SungLee, HyunLee, Sang CeolLee, Dong Ha
DGIST Authors
Lee, Hyun; Lee, Sang Ceol; Lee, Dong Ha
Issue Date
2011
Citation
2011 8th International Conference on Ubiquitous Robots and Ambient Intelligence, URAI 2011, 35-40
Type
Conference
Article Type
Conference Paper
ISBN
9780000000000
Abstract
Location sensing of physical objects is one of critical issues in many applications. Passive UHF Radio Frequency Identification (RFID) technique provides an efficient solution because of its low cost for installation and easy identification of the tagged physical objects. In this paper, we research on the localization problem using passive UHF RFID systems. We discuss theoretical and practical characteristics of a passive UHF RFID system. We propose novel algorithm to minimize the number of ambiguous tag points against a single RSSI value from a target tag and increase accuracy of location estimation in 2D grid space. Because of a single Received Signal Strength Indicator (RSSI) can be related to multiple points in the monitoring area due to signal propagation when we use the RSSI based localization technique. According to the analysis of our experiment results, our proposed approach shows over 50% improvement compared with the conventional k-Nearest Neighbor algorithm in a test frame, and 23.24cm of estimation error with a high granularity for localization of box level items with 4 different positions in the immobile applied application such as a smart shelf. © 2011 IEEE.
URI
http://hdl.handle.net/20.500.11750/3927
DOI
10.1109/URAI.2011.6145928
Publisher
Institute of Electrical and Electronics Engineers Inc.
Related Researcher
Files:
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Collection:
Convergence Research Center for Future Automotive Technology2. Conference Papers
Convergence Research Center for Wellness2. Conference Papers


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