Title page for ETD etd-050407-112549

Document Type thesis

Author Name Assad, Muhammad Ali

Email Address maassad at alum.wpi.edu

URN etd-050407-112549

Title A Real-Time Laboratory Testbed For Evaluating Localization Performance Of WIFI RFID Technologies

Degree MS

Department Electrical & Computer Engineering

Advisors
Dr. Kaveh Pahlavan, Advisor
Dr. Allen Levesque, Committee Member
Dr. Wenjing Lou, Committee Member
Dr. Fred J. Looft, Department Head

Keywords
RSS Localization
WiFi RFID
Performance Evaluation
Testbed
Channel Modeling

Date of Presentation/Defense 2007-04-24

Availability unrestricted

Abstract
A realistic comparative performance evaluation of indoor Geolocation systems is a complex and challenging problem facing the research community. This is due to the fact that performance of these systems depends on the statistical variations of the fading multipath characteristics of the wireless channel, the density and distribution of the access points in the area, and the number of the training points used by the positioning algorithm. This problem, in particular, becomes more challenging when we address RFID devices, because the RFID tags and the positioning algorithm are implemented in two separate devices. In this thesis, we have designed and implemented a testbed for comparative performance evaluation of RFID localization systems in a controlled and repeatable laboratory environment. The testbed consists of a real-time RF channel simulator, several WiFi 802.11 access points, commercial RFID tags, and a laptop loaded with the positioning algorithm and its associated user interface. In the real-time channel simulator the fading multipath characteristics of the wireless channel between the access points and the RFID tags is modeled by a modified site-specific IEEE 802.11 channel model which combines this model with the correlation model of shadow fading existing in the literature. The testbed is first used to compare the performance of the modified IEEE 802.11 channel model and the Ray Tracing channel model previously reported in the literature. Then, the testbed with the new channel model is used for comparative performance evaluation of two different WiFi RFID devices.

Files
massad.pdf

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Document Type	thesis
Author Name	Assad, Muhammad Ali
Email Address	maassad at alum.wpi.edu
URN	etd-050407-112549
Title	A Real-Time Laboratory Testbed For Evaluating Localization Performance Of WIFI RFID Technologies
Degree	MS
Department	Electrical & Computer Engineering
Advisors	Dr. Kaveh Pahlavan, Advisor Dr. Allen Levesque, Committee Member Dr. Wenjing Lou, Committee Member Dr. Fred J. Looft, Department Head
Keywords	RSS Localization WiFi RFID Performance Evaluation Testbed Channel Modeling
Date of Presentation/Defense	2007-04-24
Availability	unrestricted
Abstract A realistic comparative performance evaluation of indoor Geolocation systems is a complex and challenging problem facing the research community. This is due to the fact that performance of these systems depends on the statistical variations of the fading multipath characteristics of the wireless channel, the density and distribution of the access points in the area, and the number of the training points used by the positioning algorithm. This problem, in particular, becomes more challenging when we address RFID devices, because the RFID tags and the positioning algorithm are implemented in two separate devices. In this thesis, we have designed and implemented a testbed for comparative performance evaluation of RFID localization systems in a controlled and repeatable laboratory environment. The testbed consists of a real-time RF channel simulator, several WiFi 802.11 access points, commercial RFID tags, and a laptop loaded with the positioning algorithm and its associated user interface. In the real-time channel simulator the fading multipath characteristics of the wireless channel between the access points and the RFID tags is modeled by a modified site-specific IEEE 802.11 channel model which combines this model with the correlation model of shadow fading existing in the literature. The testbed is first used to compare the performance of the modified IEEE 802.11 channel model and the Ray Tracing channel model previously reported in the literature. Then, the testbed with the new channel model is used for comparative performance evaluation of two different WiFi RFID devices.
Files	massad.pdf