Enhanced RFID Output Control
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United States of America Patent
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Issued Date -
Mar 11, 2010
app pub date -
Aug 31, 2009
filing date -
Sep 11, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method, system, and an apparatus are provided for enhanced RFID system output control. A carrier field of an RFID reader is switched on in a controlled manner. A response signal from a passive RFID transponder located in the carrier field is received at the RFID reader. The response signal comprises a code related to the RFID transponder. Said code is detected and a time difference is determined between the switching on of the carrier field and the detection of the code signal. Said time difference provides a measure for the distance between the RFID transponder and the RFID reader.
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