The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 05, 2007
Filed:
Jun. 20, 2003
Petri Myllymäki, Helsinki, FI;
Henry Tirri, Helsinki, FI;
Petri Kontkanen, Helsinki, FI;
Jussi Lahtinen, Helsinki, FI;
Tomi Silander, Lahti, FI;
Teemu Roos, Helsinki, FI;
Antti Tuominen, Espoo, FI;
Kimmo Valtonen, Helsinki, FI;
Hannes Wettig, Kulloonkylä, FI;
Petri Myllymäki, Helsinki, FI;
Henry Tirri, Helsinki, FI;
Petri Kontkanen, Helsinki, FI;
Jussi Lahtinen, Helsinki, FI;
Tomi Silander, Lahti, FI;
Teemu Roos, Helsinki, FI;
Antti Tuominen, Espoo, FI;
Kimmo Valtonen, Helsinki, FI;
Hannes Wettig, Kulloonkylä, FI;
Ekahau Oy, Helsinki, FI;
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.