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SYSTEM AND METHOD FOR POSITION DETERMINATION OF OBJECTS

  • US 20080049555A1
  • Filed: 08/20/2007
  • Published: 02/28/2008
  • Est. Priority Date: 04/09/2002
  • Status: Active Grant
First Claim
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1. A method comprising the steps of:

  • transmitting from a transmitter unit an FSK-encoded acoustic signal comprising an identification code;

    receiving the signal in a receiver unit; and

    performing a pattern comparison of the received signal to determine a signature that is characterizing for time and Doppler shift.

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