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:
Sep. 09, 2003
Filed:
Jan. 28, 2002
Jari Syrjärinne, Tampere, FI;
Nokia Corporation, Espoo, FI;
Abstract
A method for defining the reference time error of a receiver in a positioning means includes receiving a code-modulated signal transmitted by satellites, produced by an individual code for each satellite and modulated at least with binary modulation information. Positioning is conducted to define the reference time error, and an error value is calculated using the defined location. The minimum of the error value is searched by defining the receiver location using at least two different satellite locations corresponding to the signal time of transmission and by calculating an error value for said at least two locations of the receiver. The reference time error is defined using the searched minimum of the error value. In the receiver, the moment of bit change in the modulation information is defined, wherein said moment of bit change is used for specifying the error of the reference time.