Characterisation of a UHF fading channel for an RFID-based EVI system / by Henri-Jean Marais

On the request of government's transport authority, SANRAL, the North-west University was requested to investigate the applicability of using passive ultra-high frequency (UHF) radio-frequency identification (RFID) for vehicle identification. This work focuses on the characterisation of the ph...

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Main Author: Marais, Henri-Jean
Published: North-West University 2011
Online Access:http://hdl.handle.net/10394/4106
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spelling ndltd-NWUBOLOKA1-oai-dspace.nwu.ac.za-10394-41062014-04-16T03:56:01ZCharacterisation of a UHF fading channel for an RFID-based EVI system / by Henri-Jean MaraisMarais, Henri-JeanOn the request of government's transport authority, SANRAL, the North-west University was requested to investigate the applicability of using passive ultra-high frequency (UHF) radio-frequency identification (RFID) for vehicle identification. This work focuses on the characterisation of the physical channel of passive UHF RFID for the purposes of electronic vehicle identification (EVI). A literature study was done on the principles of RFID, radio-wave propagation, fading, elctro-magnetic (EM) modelling, and simulation. An EM modelling package, SuperNEC, was used to resolve static frames of EM environments. An addition to the SuperNEC package was created for analysis of moving vehicles. Models of an RFID reader antenna assembly, tag and discrete vehicle classes were developed, which resulted in five main classes of vehicle models. The orientation angle of the reader antennas, the length of the interrogation zone, and the magnitude of reflected power from metal surfaces were determined from simulations. From the simulations, it was possible to draw profiles of the power received by tags, as well as the energy reflected from metal surfaces on vehicles. Results from simulations were analysed and the optimum reader orientation was found, interrogation zone lengths were found, and bench-marks for reflected energy were found. An alternative placement of tags on bus and truck windscreens was also a result. The initial goal was achieve, namely to address the risk of unknowns in the UHF environment. This work thus serves to support the use of UHF RFID in EVI applications.Thesis (M.Ing. (Computer and Electronical Engineering))--North-West University, Potchefstroom Campus, 2009.North-West University2011-04-08T11:54:21Z2011-04-08T11:54:21Z2008Thesishttp://hdl.handle.net/10394/4106
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sources NDLTD
description On the request of government's transport authority, SANRAL, the North-west University was requested to investigate the applicability of using passive ultra-high frequency (UHF) radio-frequency identification (RFID) for vehicle identification. This work focuses on the characterisation of the physical channel of passive UHF RFID for the purposes of electronic vehicle identification (EVI). A literature study was done on the principles of RFID, radio-wave propagation, fading, elctro-magnetic (EM) modelling, and simulation. An EM modelling package, SuperNEC, was used to resolve static frames of EM environments. An addition to the SuperNEC package was created for analysis of moving vehicles. Models of an RFID reader antenna assembly, tag and discrete vehicle classes were developed, which resulted in five main classes of vehicle models. The orientation angle of the reader antennas, the length of the interrogation zone, and the magnitude of reflected power from metal surfaces were determined from simulations. From the simulations, it was possible to draw profiles of the power received by tags, as well as the energy reflected from metal surfaces on vehicles. Results from simulations were analysed and the optimum reader orientation was found, interrogation zone lengths were found, and bench-marks for reflected energy were found. An alternative placement of tags on bus and truck windscreens was also a result. The initial goal was achieve, namely to address the risk of unknowns in the UHF environment. This work thus serves to support the use of UHF RFID in EVI applications. === Thesis (M.Ing. (Computer and Electronical Engineering))--North-West University, Potchefstroom Campus, 2009.
author Marais, Henri-Jean
spellingShingle Marais, Henri-Jean
Characterisation of a UHF fading channel for an RFID-based EVI system / by Henri-Jean Marais
author_facet Marais, Henri-Jean
author_sort Marais, Henri-Jean
title Characterisation of a UHF fading channel for an RFID-based EVI system / by Henri-Jean Marais
title_short Characterisation of a UHF fading channel for an RFID-based EVI system / by Henri-Jean Marais
title_full Characterisation of a UHF fading channel for an RFID-based EVI system / by Henri-Jean Marais
title_fullStr Characterisation of a UHF fading channel for an RFID-based EVI system / by Henri-Jean Marais
title_full_unstemmed Characterisation of a UHF fading channel for an RFID-based EVI system / by Henri-Jean Marais
title_sort characterisation of a uhf fading channel for an rfid-based evi system / by henri-jean marais
publisher North-West University
publishDate 2011
url http://hdl.handle.net/10394/4106
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