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2010

RFID Reader Receivers for Physical Layer Collision Recovery

9 years 5 months ago
RFID Reader Receivers for Physical Layer Collision Recovery
Abstract--Arbitration and scheduling of multiple tags in stateof-the-art Radio Frequency Identification (RFID) systems is accomplished on the medium access control layer. Currently, only answers of a single tag can be decoded in such a system. If multiple tags respond simultaneously, a collision occurs. In that case, conventional systems discard the physical layer information and a retransmission is executed. This work shows how to recover from such collisions on the physical layer and successfully read the data. The contributions of the paper are: 1) An analysis of the achievable throughput increase of a system, that can recover from collisions at a physical layer is given. 2) A model for a description of collisions on the physical layer is presented. 3) Based on this model, we propose a channel estimation method and two types of receiver structures for separating the signals of a collision of two tags: first, single antenna receivers that discriminate the sources of the two tags in t...
Christoph Angerer, Robert Langwieser, Markus Rupp
Added 21 May 2011
Updated 21 May 2011
Type Journal
Year 2010
Where TCOM
Authors Christoph Angerer, Robert Langwieser, Markus Rupp
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