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Near field electromagnetic positioning calibration system and method

  • US 7,592,949 B2
  • Filed: 11/19/2007
  • Issued: 09/22/2009
  • Est. Priority Date: 08/19/2002
  • Status: Expired due to Term
First Claim
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1. A method for calibrating an electromagnetic position determination system, said position determining system determining an unknown position of a beacon transmitter within a predefined region by generating a positioning data set and matching said positioning data set with a plurality of calibration data sets;

  • said unknown position determined based on a position corresponding to a calibration data set of said plurality of calibration data sets, that most closely matches said positioning data set;

    said method for calibrating said position determination system comprising;

    1) generating a calibration database containing said plurality of calibration data sets, each calibration data set of said plurality of calibration data sets generated by;

    a) transmitting a calibration transmission from a respective known transmitter position of a plurality of transmitter positions within said predefined region;

    b) receiving said calibration transmission at a plurality of known receiver positions and producing said calibration dataset, each said calibration data set comprising a plurality of comparison values comparing two received signal characteristics of said calibration transmission at each receiver position of said plurality of known receiver positions;

    c) associating each said calibration dataset with said respective known transmitter position; and

    d) storing each said calibration dataset and said respective known transmitter position in said calibration database.

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