Method, system, and apparatus for remote data calibration of...

Details Method, system, and apparatus for remote data calibration of... Method, system, and apparatus for remote data calibration of...

2005-10-18

2005-10-18

Wamsley, Patrick (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from particular bit symbol

C340S572100, C340S010200

Reexamination Certificate

active

06956509

ABSTRACT:
A method, system, and apparatus for remotely calibrating data symbols received by a radio frequency identification (RFID) tag population are described. Tags are interrogated by a reader, which may be located in a network of readers. The reader transmits data symbols to the tags. Tags respond to the interrogations with symbols that each represent one or more bits of data. To calibrate the tags, the reader transmits a plurality of pulses of different lengths to the tag population. The tags receive the plurality of pulses. A characteristic of each pulse, such as a pulse length, is stored by the tags. The stored pulse lengths are used to define different data symbols that are subsequently received by the tags from the reader.

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