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Dynamic signal detection threshold

  • US 8,774,710 B2
  • Filed: 06/21/2011
  • Issued: 07/08/2014
  • Est. Priority Date: 07/01/2010
  • Status: Active Grant
First Claim
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1. A method for setting a signal detection threshold, the method comprising:

  • transmitting an outgoing signal;

    determining a measure of a noise floor in a signal derived from a radio frequency signal received by an antenna during the transmitting and prior to sending a command to a transponder to respond, the determining being performed using a same circuit used to detect a subcarrier signal; and

    setting a signal detection threshold above the noise floor.

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