RFID receiver

Details RFID receiver RFID receiver

2006-10-27

2009-12-15

Zimmerman, Brian A (Department: 2612)

Communications: electrical

Selective

Interrogation response

C340S010200, C340S005600, C375S262000, C375S341000

Reexamination Certificate

active

07633377

ABSTRACT:
RFID data signals from RFID tags may be recovered by determining the probabilities of transitions between data states between a series of a pairs of signal samples using a set of predetermined probabilities related to data, timing, baud rate and/or phase variables affecting the received signal and processing those determined probabilities to determine the sequence of such transitions that has the highest probability of occurrence. A second set of predetermined probabilities related to transitions in the opposite direction may be used to sequence in a reverse direction. The determination of the sequence representing the RFID tag data may be iterated in both directions until further iterations don't change the determined probabilities.

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