Phase based spatial identification of UHF RFID tags

In this paper, we give an overview of spatial identification (determining position and velocity) of modulated backscatter UHF RFID tags using RF phase information. We describe three main techniques based on PDOA (Phase Difference of Arrival): TD (Time Domain), FD (Frequency Domain), and SD (Spatial...

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Bibliographic Details
Published in2010 IEEE International Conference on RFID (IEEE RFID 2010) pp. 102 - 109
Main Authors Nikitin, Pavel V, Martinez, Rene, Ramamurthy, Shashi, Leland, Hunter, Spiess, Gary, Rao, K V S
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.04.2010
Subjects
Backscatter
Bandwidth
Frequency domain analysis
Phase modulation
Portals
Radio frequency
Radiofrequency identification
RFID tags
USA Councils
Wireless sensor networks
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Summary:In this paper, we give an overview of spatial identification (determining position and velocity) of modulated backscatter UHF RFID tags using RF phase information. We describe three main techniques based on PDOA (Phase Difference of Arrival): TD (Time Domain), FD (Frequency Domain), and SD (Spatial Domain). The techniques are illustrated with modeling and simulation example in free space and in presence of multipath using a multi-ray channel model for amplitude and phase of the received tag signal in deterministic environment. We also present and discuss the experiments performed in a real RFID warehouse portal environment.
ISBN:9781424457427
1424457424
ISSN:2374-0221
2573-7635
DOI:10.1109/RFID.2010.5467253