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Method and apparatus for location tracking in a multi-path environment

  • US 7,164,929 B2
  • Filed: 01/09/2004
  • Issued: 01/16/2007
  • Est. Priority Date: 01/09/2004
  • Status: Active Grant
First Claim
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1. A method of calibrating a wireless tracking system, comprising:

  • providing at least one calibration signal using a mobile unit having a first plurality of antennae while the mobile unit is proximate at least one predetermined location;

    receiving a plurality of signals at a second plurality of antennae in response to providing the at least one calibration signal;

    determining a portion of a transmission matrix using the plurality of received signals and the at least one calibration signal; and

    associating the portion of the transmission matrix with the predetermined location, wherein associating the portion of the transmission matrix with the predetermined location comprises associating the portion of the transmission matrix with the predetermined location using a portion of at least one stored transmission matrix, and wherein the portion of the at least one stored transmission matrix is associated with the predetermined location.

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