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METHOD FOR SIMULTANEOUS DETECTION OF A PLURALITY OF RFID TAGS USING MULTIUSER DETECTION

  • US 20100039233A1
  • Filed: 08/12/2009
  • Published: 02/18/2010
  • Est. Priority Date: 08/12/2008
  • Status: Active Grant
First Claim
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1. A method for distinguishing responses received by an RFID detector from a plurality of simultaneously queried RFID tags, the method comprising:

  • querying the plurality of RFID tags;

    receiving an aggregated RF response from the plurality of RFID tags;

    characterizing the aggregated RF response according to a plurality of characteristics, the plurality of characteristics including at least RF amplitude and RF phase;

    according to the characterization of the aggregated RF response, estimating at least one parameter, the at least one parameter including a number of RFID tag responses included in the aggregated RF response; and

    applying multiuser detection to the aggregated RF response according to the at least one estimated parameter so as to distinguish each of the RFID tag responses included in the aggregated RF response.

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