Radio frequency identification interrogation systems and methods of operating the same
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United States of America Patent
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Issued Date -
Jan 26, 2006
app pub date -
Mar 25, 2005
filing date -
Mar 26, 2004
priority date (Note) -
Abandoned
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Abstract
A reply code for a radio frequency identification (RFID) tag, a method of improving a reply code for a radio frequency identification (RFID) tag for interrogation by an interrogator and an RFID tag employing the same. In one embodiment, the reply code includes a preamble having information about a quality of a clock associated with the RFID tag. The reply code also includes a tag identification (ID) code providing a digital signature for the RFID tag. The reply code still further includes an aftamble located aft of the preamble and having information about the quality of the clock. The aftamble cooperates with the preamble to improve a quality of the reply code for interrogation by an interrogator.
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