Scanning methods and apparatus for system acquisition

Details Scanning methods and apparatus for system acquisition Scanning methods and apparatus for system acquisition

H - Electricity

04

W

H04W 48/16 (2009.01) H04W 48/20 (2009.01)

Patent

CA 2665664

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.

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