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:
Aug. 13, 2002
Filed:
May. 08, 2001
Paula Syrjärinne, Tampere, FI;
Ilkka Kontola, Julkujärvi, FI;
Nokia Mobile Phones Ltd., Espoo, FI;
Abstract
The invention relates to a method for determining the position of an object to be searched for. The method applies a receiver (RX ) for the object to be searched substantially in the vicinity of the object to be searched, a receiver (RX ) for a searcher, with respect to which the position of the object to be searched is determined, and satellites (SV -SV ) from which a code-modulated random spectrum signal is transmitted, and positioning data of the satellites are determined. In the method, a default position (└{circumflex over (x)} ,ŷ ,{circumflex over (z)} ,{circumflex over (t)} ┘) is determined for the receiver (RX ) of the searcher; pseudo ranges (&rgr; ) to at least three satellites (SV -SV ) are measured on the basis of signals received from the satellites in the receiver (RX ) of the object to be searched; pseudo ranges (&rgr; ) to at least said three satellites (SV -SV ) are measured on the basis of signals received from the satellites in the receiver (RX ) of the searcher; and at least the direction and distance (└&Dgr;x,&Dgr;y,&Dgr;z,&Dgr;t┘) of the object to be searched from the receiver (RX ) of the searcher are determined.