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IDENTIFICATION FRIEND OR FOE (IFF) SYSTEM

  • US 20100309039A1
  • Filed: 06/03/2010
  • Published: 12/09/2010
  • Est. Priority Date: 06/03/2009
  • Status: Active Grant
First Claim
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1. A transponder comprising:

  • a linear receiver configured to receive one or more interrogator signals;

    an analog-to-digital converter (ADC) having an input configured to receive an analog signal from said linear receiver and having an output at which a digital signal is provided;

    a digital processor configured to receive digital signals provided thereto from said ADC and to utilize data in an interrogator signal to confirm that if two interrogator signals are received within a predetermined period of time and if the first interrogator signal corresponds to a side lobe interrogator signal and the second interrogator signal corresponds to a reflected main beam signal, said digital processor suppresses transmission of a reply signal by the transponder.

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