Radio Frequency Identification Tag Location Estimation and Tracking System and Method
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United States of America Patent
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Issued Date -
Jun 9, 2016
app pub date -
Feb 11, 2016
filing date -
Apr 14, 2008
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Abstract
Systems and methods for locating one or more radio frequency identification (RFID) tags are provided. A phase difference of received information signals of illuminated RFID tags is utilized to locate the RFID tags. One or more exciters transmit interrogation signals to illuminate the RFID tags in which the exciters may have a plurality of antenna selectively configured to transmit through two or more antennas and to receive on one antenna. Multiple reads of the same RFID tag can also be performed to generate a probability model of the location of the RFID tag. An enhanced particle filter is applied to probability model to determine the exact location of the RFID.
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