Realization of a CDMA-based RFID System Using a Semi-Active UHF Transponder
Löffler A (2010)
Publication Type: Conference contribution
Publication year: 2010
Edited Volumes: Proceedings - 6th International Conference on Wireless and Mobile Communications, ICWMC 2010
Pages Range: 5-10
Conference Proceedings Title: 2010 Sixth International Conference on Wireless and Mobile Communications
Event location: Valencia, Spain
ISBN: 978-0-7695-4182-2
URI: http://www.iaria.org/conferences2010/ICWMC10.html
Abstract
RFID systems may increase the efficiency of logistic systems, e.g., inventory of stocks. Unfortunately, present existing systems come fast to their limits if a great amount of RFID transponder must be inventoried in very short time, as the channel access method of current RFID systems is Time Division Multiple Access. To shorten the inventory process, this work shows a first realization of an RFID-based semi-active UHF transponder using a Code Division Multiple Access method. The work concentrates on the uplink channel (tag to reader) that covers the transponder's backscattered signals. This channel access method enables simultaneous transfer of data, meaning that all transponder in the field may respond at the same time within the same frequency band. The data transfer realized for the uplink channel, uses a certain set of orthogonal spreading sequences (modified Gold codes) being different for every transponder. The RFID reader used in this work despreads the backscattered signals and decodes the data of the different transponder. Briefly, this work shows, in principle, the opportunity for a simultaneous data transfer on the uplink channel in RFID systems, which in turn may shorten very much the time for a complete inventory round. © 2010 IEEE.
Authors with CRIS profile
Andreas Löffler
Lehrstuhl für Informationstechnik mit dem Schwerpunkt Kommunikationselektronik (Stiftungslehrstuhl)
How to cite
APA:
Löffler, A. (2010). Realization of a CDMA-based RFID System Using a Semi-Active UHF Transponder. In 2010 Sixth International Conference on Wireless and Mobile Communications (pp. 5-10). Valencia, Spain, ES.
MLA:
Löffler, Andreas. "Realization of a CDMA-based RFID System Using a Semi-Active UHF Transponder." Proceedings of the 2010 Sixth International Conference on Wireless and Mobile Communications, Valencia, Spain 2010. 5-10.
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