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:
Nov. 02, 2010
Filed:
Sep. 19, 2001
Bernd Bienek, Bocholt, DE;
Andreas Falkenberg, Escondido, CA (US);
Stephan Karger, Hamminkeln, DE;
Theo Kreul, Coesfeld-Lette, DE;
Albrecht Kunz, Saarbrücken, DE;
Holger Landenberger, Bocholt, DE;
Bernd Bienek, Bocholt, DE;
Andreas Falkenberg, Escondido, CA (US);
Stephan Karger, Hamminkeln, DE;
Theo Kreul, Coesfeld-Lette, DE;
Albrecht Kunz, Saarbrücken, DE;
Holger Landenberger, Bocholt, DE;
Palm, Inc., Sunnyvale, CA (US);
Abstract
A method is provided for frequency acquisition, particularly for initial frequency acquisition, pursuant to a known synchronization sequence for synchronizing a mobile communications device having a local oscillator with previously known transmit frequencies of a base station that transmit in a known channel raster with defined frequency points within a band, wherein the method includes the steps of determining the inband power of the known synchronization sequence via a sensor by scanning a frequency band, performing coarse determination of the local power maximum of the inband power and, thus, of the received carrier frequency over the scanned frequency band, producing a presumed channel frequency at which the base station is transmitting on the basis of knowledge of the channel raster of the transmit frequencies of the base station, performing fine determination of the received carrier frequency by comparison with the known synchronization sequence, and correcting the frequency deviation of the local oscillator from the transmitted carrier frequency.