Design and implementation of a passive UHF RFID-based Real Time Location System

Author

Xiong, Ting-Wen ; Liu, Jun-Juan ; Yang, Yu-Qing ; Tan, Xi ; Min, Hao

Author_Institution

State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China

fYear

2010

fDate

26-29 April 2010

Firstpage

95

Lastpage

98

Abstract

A passive Ultra-High Frequency (UHF) Radio Frequency Identification (RFID) based Real Time Locating System (RTLS) is presented in the paper. For the validation, a reader has been developed and complemented with a tag modulator to form a complete UHF RFID-based real time locating system focused on backscattering communication. PN sequences have been used to measure the TOA and estimate the distance between reader and tag. A TX-to-RX leakage canceller has been applied in the reader RF front-end to increase the isolation and enhance the sensitivity. Measurement results indicate that the estimation accuracy in real time is about 1.6 meters and the mean estimation error of 1000 times´ measurement in 1 second is less than 0.5 meter.

Keywords

UHF devices; backscatter; radiofrequency identification; time-of-arrival estimation; transceivers; PN sequences; RTLS; TOA estimation; TX-to-RX leakage canceller; UHF RFID; backscattering communication; real time location system; time-of-arrival estimation; ultra-high frequency radio frequency identification; Active RFID tags; Backscatter; Direction of arrival estimation; Frequency; Passive RFID tags; Radar tracking; Radiofrequency identification; Real time systems; Sensor systems; UHF measurements; Radio Frequency Identification (RFID); Real Time Locating System (RTLS); Time of Arrival (TOA); backscattering;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Design Automation and Test (VLSI-DAT), 2010 International Symposium on

Conference_Location

Hsin Chu

Print_ISBN

978-1-4244-5269-9

Electronic_ISBN

978-1-4244-5271-2

Type

conf

DOI

10.1109/VDAT.2010.5496700

Filename

5496700