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RFID reader with multi antenna physical layer collision recovery receivers

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3 Author(s)
Kaitovic, J. ; Inst. of Telecommun., Vienna Univ. of Technol., Vienna, Austria ; Langwieser, Robert ; Rupp, M.

Radio Frequency Identification (RFID) is a wireless identification technology which often operates in environments with multiple RFID tags. Already introduced multiple antenna receivers can recover from a collision of up to M tags as long as M is less than the number of receive antennas and the channel is known at the receiver. This paper proposes a Zero-Forcing (ZF) and a Minimum Mean Square Error (MMSE) receiver which allows the separation of up to M=2NR tags, where NR is the number of receiving antennas on the reader. The proposed algorithms are verified through simulations.

Published in:

RFID-Technologies and Applications (RFID-TA), 2011 IEEE International Conference on

Date of Conference:

15-16 Sept. 2011