Title :
Coherence multiplexed passive wireless SAW RFID tag system
Author :
Saldanha, N. ; Malocha, Donald C. ; Youngquist, Robert C.
Author_Institution :
Electr. & Comput. Eng. Dept., Univ. of Central Florida, Orlando, FL, USA
Abstract :
This paper discusses a novel coherence multiplexed system for passive surface acoustic wave (SAW) RF-identification (RFID) tags. The method is adapted from optical coherence-domain reflectometry (OCDR) which is widely used today in optical coherence tomography (OCT) for medical applications. The paper discusses the coherence multiplexing technique as applied to SAW RFID. A broadband white Gaussian noise source is used as the interrogation signal and one of the major advantages is the large signal dynamic range obtained. A prototype transceiver system was built at 915MHz and used for wireless interrogation of SAW tags. The signal processing technique is discussed and the results of wireless multiplexing of four RFID SAW tags are shown.
Keywords :
Gaussian noise; multiplexing; optical tomography; radiofrequency identification; reflectometry; signal processing; surface acoustic waves; OCDR; OCT; broadband white Gaussian noise source; coherence multiplexed passive wireless SAW RFID tag system; coherence multiplexing technique; frequency 915 MHz; interrogation signal; medical applications; optical coherence tomography; optical coherence-domain reflectometry; passive surface acoustic wave RF-identification tags; signal processing technique; transceiver system; wireless interrogation; Coherence; Delays; Noise; Optical variables control; Radiofrequency identification; Surface acoustic waves; Wireless communication; SAW RFID system; SAW multiplexing; coherence multiplexing; passive wireless RFID;
Conference_Titel :
Wireless Sensors and Sensor Networks (WiSNet), 2013 IEEE Topical Conference on
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4673-3104-3
Electronic_ISBN :
978-1-4673-2931-6
DOI :
10.1109/WiSNet.2013.6488615
