Algoritmo para la detección de lecturas de etiquetas no deseadas en sistemas RFID UHF pasivos para objetos metálicos estáticos (Algorithm for Detection of Unwanted Tag Reads in Passive UHF RFID Systems for Static Metallic Objects)

Yackeline de Jesús Ternera (terneray@uninorte.edu.co)1, Juan Carlos Velez (jcvelez@uninorte.edu.co)1, Maria Gabriela Calle (mcalle@uninorte.edu.co)1, Luis Alberto Torres (ltorres@uninorte.edu.co)1


1Universidad del Norte

This paper appears in: Revista IEEE América Latina

Publication Date: Nov. 2017
Volume: 15,   Issue: 11 
ISSN: 1548-0992


Abstract:
Passive Ultra High Frequency Radio Identification (UHF RFID) systems used in metal objects exhibit challenges due to generation of Foucault currents and multiple reflections, creating reading problems and detection errors. One of these problems is unwanted RFID tag reads i.e., tags unintentionally detected by the reader. The paper presents one algorithm for reduction of such unwanted tag reads using normalized read rate and range of RFID tags. The algorithm was designed using extensive data from measurements of an actual RFID system with tags located over metal objects. Results show that the algorithm detects 96% of unwanted tag reads.

Index Terms:
Foucault currents, phase rotation angle, circular statistics, tag read rate, distance estimation   


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