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System and method for operating an RFID system with head tracking

  • US 8,890,657 B2
  • Filed: 10/30/2009
  • Issued: 11/18/2014
  • Est. Priority Date: 10/30/2009
  • Status: Active Grant
First Claim
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1. A method of transmitting radiofrequency identification (RFID) interrogation signals, the method comprising:

  • detecting if a user'"'"'s head is pointed to their left or to their right;

    transmitting a RFID interrogation signal in response to whether the user'"'"'s head is pointed to their left or to their right such that when the user'"'"'s head is pointed to their left the RFID interrogation signal is steered by a RFID reader to the user'"'"'s left and when the user'"'"'s head is pointed to their right, the RFID interrogation signal is steered by the RFID reader to the user'"'"'s right;

    adjusting a strength of the RFID interrogation signal in response to detecting movement of the user'"'"'s head in a vertical direction.

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