Talks and Poster Presentations (with Proceedings-Entry):
C. Angerer, G. Maier, M. Bueno Delgado, M. Rupp, J. Vales Alonso:
"Single Antenna Physical Layer Collision Recovery Receivers for RFID Readers";
Talk: IEEE International Conference on Industrial Technologies,
Vina del Mar, Chile;
- 03-17-2010; in: "Proceedings of the IEEE International Conference on Industrial Technologies",
Radio Frequency Identification (RFID) systems often are operated in environments with multiple RFID tags. In such an environment, a conventional RFID system resolves collisions of multiple tags on the medium access control layer, discarding the signals of the physical layer. This paper proposes a zero-forcing and an interference cancellation receiver architecture for an RFID reader, to recover from collisions of two tags on a physical layer and identify tags successfully even in case of a collision. The expected throughput increase is approximately 1.6 times the throughput of a conventional reader. We explore the signal properties of collisions and propose a model for the physical layer. Moreover, we present a method for estimating the signal constellation states in a collision. The entire structure, including channel estimation and both of the proposed receivers are verified with data generated during a measurement. Additionally, performance simulations of the two structures with different channels are shown.
RFID, collision recovery, collision resolution, receiver, reader, multiple tags, signal separation, framed slotted aloha, physical layer
Electronic version of the publication:
Project Head Christoph Mecklenbräuker:
Christian Doppler Lab "Funktechnologien für nachhaltige Mobilität"
Created from the Publication Database of the Vienna University of Technology.