Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-04-24
2007-04-24
Nguyen, Duc (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456200, C455S456500, C455S456600, C455S457000, C701S205000
Reexamination Certificate
active
10999220
ABSTRACT:
A method for determining an error estimate concerning a target device's location. The target device moves and communicates in a wireless environment using signals having at least one measurable signal value. A probabilistic model of the wireless environment indicates a probability distribution for signal values at several sample points in the wireless environment. A set of observations of signal values is made and the target device's location is estimated based on the probabilistic model and the set of observations. The error estimate is determined as a combination of products over several sample points. Each product comprises a probability distribution for the sample point in question being the target device's location and a distance function between the sample point in question and the target device's estimated location.
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Kontkanen Petri
Lahtinen Jussi
Myllymäki Petri
Roos Teemu
Tirri Henry
Ekahau Oy
Lee Justin
Nguyen Duc
Pillsbury Winthrop Shaw & Pittman LLP
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