Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-06-05
2007-06-05
Smith, Creighton (Department: 2614)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S426100, C342S357490
Reexamination Certificate
active
10465785
ABSTRACT:
A method for estimating a receiver's location in a wireless communication environment having several channels. Each channel has at least one signal parameter that varies with location differently from the other channels. A set of calibration data is determined for each calibration point, each set including the location and at least one measured signal parameter for each of several channels. The calibration data serve as a basis for a statistical model of the signal parameters versus a receiver's location. A set of observed signal parameters is determined, the set including at least one signal parameter for each of several channels at the receiver's location. A location estimate approximating the location of the receiver is determined on the basis of the statistical model and the set of observed signal parameters.
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Kontkanen Petri
Lahtinen Jussi
Myllymäki Petri
Roos Teemu
Silander Tomi
Barnes & Thornburg LLP
Ekahau Oy
Smith Creighton
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