TECHNIQUES FOR DETERMINING THE RANGE AND MOTION OF UHF RFID TAGS

Open Access
Author:
Pujare, Urmila
Graduate Program:
Electrical Engineering
Degree:
Master of Science
Document Type:
Master Thesis
Date of Defense:
November 16, 2010
Committee Members:
  • Raj Mittra, Thesis Advisor
Keywords:
  • Motion
  • Range
  • RFID
Abstract:
The study focuses on determining the range, velocity, and direction of motion of one or more UHF RFID tagged objects present within a broadcast-and-receive range of an RFID tag reader using the Phase- Difference-of-Arrival concept. Different processing techniques with their respective advantages and disadvantages are presented. The data, which were collected in different environmental settings and situations, were processed and the results analyzed. In addition, the study includes an assessment of the accuracies of the algorithms and develops theoretical methods to validate the observations. Sources of errors were identified and suggestions regarding possible solutions and future improvements are offered. The thesis also presents real-life application scenarios each of which uses this feature in its RFID system.