DocumentCode :
531547
Title :
An UHF RFID tag emulator for precise emulation of the physical layer
Author :
Winkler, Michael ; Faseth, Thomas ; Arthaber, Holger ; Magerl, Gottfried
Author_Institution :
Inst. of Electrodynamics, Microwave & Circuit Eng., Vienna Univ. of Technol., Vienna, Austria
fYear :
2010
fDate :
28-30 Sept. 2010
Firstpage :
1750
Lastpage :
1753
Abstract :
In this paper the implementation of a configurable hardware for an UHF RF identification (RFID) tag emulator at 868 MHz is demonstrated. The tag emulator is used for reader performance verification under worst case conditions. The characteristics of a tag can precisely be emulated: reflection coefficient dependent on received signal strength, variation of the frequency, and timing jitter of the backscattered signal. The implemented tag emulator is segmented into an RF transceiver board and a baseband processing board with a powerful field programmable gate array (FPGA). Both boards are connected by optical links to not influence the electromagnetic field. The compact low power RF transceiver board is placed in the reader´s electromagnetic field and is optically powered. The baseband processing board handles the signal processing for the implemented backscatter modulator and evaluates and monitors the signal strength and signal characteristics received by the reader. For being prepared to upcoming standards, an I/Q backscatter modulator with a variable modulation index is implemented. The higher protocol layers are processed by a microcomputer for rapid prototyping. In this paper the underlaying hardware, the synchronization algorithm for the optical links, and the modulator properties of the UHF RFID tag emulator are discussed.
Keywords :
UHF circuits; backscatter; electromagnetic fields; field programmable gate arrays; modulation; optical links; radiofrequency identification; FPGA; I/Q backscatter modulator; UHF RF identification; UHF RFID tag emulator; backscattered signal; baseband processing board; electromagnetic field; field programmable gate array; frequency 868 MHz; modulation index; optical links; power RF transceiver board; precise emulation; rapid prototyping; reader performance verification; reflection coefficient; signal processing; signal strength; synchronization algorithm; timing jitter;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Conference (EuMC), 2010 European
Conference_Location :
Paris
Print_ISBN :
978-1-4244-7232-1
Type :
conf
Filename :
5616451
Link To Document :
بازگشت