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24236 Exploiting phase measurements of EPC Gen2 RFID tags
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Huiting, J. and Flisijn, H. and Kokkeler, A.B.J. and Smit, G.J.M. (2013) Exploiting phase measurements of EPC Gen2 RFID tags. In: 2013 IEEE International Conference on RFID-Technologies and Applications (RFID-TA), 4-5 Sep 2013, Johor Bahru, Malaysia. pp. 1-4. IEEE RFID. ISBN 978-1-4673-4656-6

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This paper presents a 2d localization system for
UHF RFID tags. By measuring the phase between the transmitted
continuous wave and received backscatter from the tag
at different frequencies, it is possible to estimate the distance
between the reader and tag. By determining distance estimates
to three antennas it is possible to determine a location of a tag
with the help of trilateration. The location of the antennas has
to be known and any error in distance measurement influences
the location estimate. Mainly to overcome the expected impact
of the environment on the distance estimate, we opt for the use
of reference tags and the K-Nearest Neighbor (KNN) algorithm
to derive a location. An experiment is done and results are
compared with an KNN algorithm based on received signal
strength. Furthermore some experiments are done to verify the
use of phase measurements for the detection of stationary tags
in a portal application.

Item Type:Conference or Workshop Paper (Full Paper, Talk)
Research Group:EWI-CAES: Computer Architecture for Embedded Systems
Research Program:CTIT-WiSe: Wireless and Sensor Systems
Research Project:TSP: Tracking, tracing, Sensoring Platform
ID Code:24236
Deposited On:09 January 2014
More Information:statisticsmetis

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