Patent ID: 7592949

Claim:
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.