Invention Grant
- Patent Title: Method for frequency acquisition of a mobile communications device
- Patent Title (中): 用于移动通信设备的频率采集的方法
-
Application No.: US10381149Application Date: 2001-09-19
-
Publication No.: US07826577B2Publication Date: 2010-11-02
- Inventor: Bernd Bienek , Andreas Falkenberg , Stephan Karger , Theo Kreul , Albrecht Kunz , Holger Landenberger
- Applicant: Bernd Bienek , Andreas Falkenberg , Stephan Karger , Theo Kreul , Albrecht Kunz , Holger Landenberger
- Applicant Address: US CA Sunnyvale
- Assignee: Palm, Inc.
- Current Assignee: Palm, Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: K&L Gates LLP
- Priority: DE10046575 20000920
- International Application: PCT/DE01/03612 WO 20010919
- International Announcement: WO02/25881 WO 20020328
- Main IPC: H04L7/00
- IPC: H04L7/00

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.
Public/Granted literature
Information query