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Locating a wireless user

  • US 20040062220A1
  • Filed: 09/16/2003
  • Published: 04/01/2004
  • Est. Priority Date: 09/06/1994
  • Status: Active Grant
First Claim
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1. A method for locating a wireless user, the method comprising:

  • transmitting from a plurality of antennas a first spread spectrum signal having an associated code;

    receiving of the first spread spectrum signals at the wireless user;

    for each received first spread spectrum signal, transmitting a second spread spectrum signal having an associated code having a same phase as that received first spread spectrum signal;

    receiving the second spread spectrum signals at the plurality of antennas;

    determining a distance measurement between each antenna and the wireless user based on in part a received timing of the second signals; and

    determining the wireless user'"'"'s location based on in part the distance determinations.

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