Patent Document ID: 6064339
Application ID: 09137640
Patent Status: 1

Claim One:
1. In a system for wireless transmitter location finding, a method for selecting from a set of calibrated transmitter locations a set of most likely locations, the method comprising: measuring at a base station a transmitter signal signature R; calculating a difference between a function L.sub.R and each function L.sub.R.sbsb.i in a set of functions L.sub.R.sbsb.1,. .. , L.sub.R.sbsb.M, where the function L.sub.R represents how signature R compares to a set of calibrated signatures which corresponds to the set of calibrated locations, and where the functions L.sub.R.sbsb.1,. .. , L.sub.R.sbsb.M represent how each signature in a set of M calibrated signatures compares to the set of calibrated signatures; selecting a set of most likely signatures, such that, for each most likely signature R.sub.k, the calculated difference between the function L.sub.R and L.sub.R.sbsb.k is smaller than a predetermined threshold; and identifying a subset of the set of calibrated transmitter locations, wherein each location in the subset corresponds to a signature in the selected subset of most likely signatures.