UHF RFID Indoor Positioning System With Phase Interference Model Based on Double Tag Array

A UHF radio-frequency identification (RFID) indoor positioning system based on phase difference is presented in this paper. An additional auxiliary tag and the target tag make up a double tag array to eliminate the phase ambiguity. To quantify the phase offset caused by the interference between tags...

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Bibliographic Details
Published in:IEEE access 2019, Vol.7, p.76768-76778
Main Authors: Zeng, Yanhan, Chen, Xiheng, Li, Ruguo, Tan, Hong-Zhou
Format: Article
Language:English
Subjects:
Accuracy
Arrays
double tag array
Genetic algorithms
Indoor positioning
Interference
interference model
Mathematical models
phase difference
Phase measurement
Phased arrays
Position measurement
Radio frequency identification
Radiofrequency identification
UHF RFID
Ultrahigh frequencies
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Summary:A UHF radio-frequency identification (RFID) indoor positioning system based on phase difference is presented in this paper. An additional auxiliary tag and the target tag make up a double tag array to eliminate the phase ambiguity. To quantify the phase offset caused by the interference between tags, a mathematical model is built. Based on the double tag array and the interference model, a hyperbolic positioning algorithm, combining the genetic algorithm, is implemented to improve the positioning accuracy. Compared with other RFID positioning systems, the proposed system achieves a better positioning accuracy of 0.2217 m.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2921560