Invention Grant
- Patent Title: Scanning methods and apparatus for system acquisition
- Patent Title (中): 系统采集扫描方法及装置
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Application No.: US12118143Application Date: 2008-05-09
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Publication No.: US08098630B2Publication Date: 2012-01-17
- Inventor: Anthony William Tod , Anton Pavlovich
- Applicant: Anthony William Tod , Anton Pavlovich
- Applicant Address: CA Waterloo, Ontario
- Assignee: Research In Motion Limited
- Current Assignee: Research In Motion Limited
- Current Assignee Address: CA Waterloo, Ontario
- Agent John J. Oskorep, Esq.
- Main IPC: H04J13/00
- IPC: H04J13/00 ; H04B7/216 ; H04W4/00

Abstract:
In one illustrative example, a system acquisition method suitable for use in W-CDMA utilizes a receiver having an automatic frequency control (AFC) circuit. A system acquisition scan is performed over a plurality of candidate frequencies in an RF band. During the system acquisition scan, a pilot signal of a system on one of the candidate frequencies is detected. When information of the system is successfully decoded, and the system is different from a requested system (e.g. not the RPLMN or HPLMN), the pilot signal of the system is assigned as a timing reference in the receiver for one or more remaining candidate frequencies of the system acquisition scan. Therefore, an AFC window time otherwise needed to converge on a remaining candidate frequency is not needed or reduced.
Public/Granted literature
- US20090279508A1 Scanning Methods And Apparatus For System Acquisition Public/Granted day:2009-11-12
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