Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Reexamination Certificate
2008-09-30
2011-12-20
Le, Nhan (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
C455S234100, C455S334000, C375S345000
Reexamination Certificate
active
08081939
ABSTRACT:
A frequency-control unit is used for controlling an external controllable reference-frequency source. The frequency-control unit includes a filter unit with a controllable filter parameter, which is configured to derive, using the filter parameter, from a frequency-error signal a frequency-control signal for minimizing the frequency error of the reference frequency; and a correlation unit, which is configured to determine from frequency errors of the reference frequency at different points in time a correlation measure indicative of a correlation between the frequency errors at the different points in time. The frequency-control unit is configured to adapt the controllable filter parameter of the filter unit in dependence on the determined correlation measure. The value of the filter parameter can depend also on a receiver path strength, such as an RSCP value.
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3GPP TS 25.101, “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; User Equipment (UE) Radio Transmission and Reception (FDD)”, release 7, Mar. 2007; http://www.3gpp.org.; pp. 1-143.
Bouyaud Mickael
D'Alessandro Pierluigi
Hogan & Lovells US LLP
Kubida William J.
Le Nhan
Meza Peter J.
ST-Ericsson SA
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