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    • 9. 发明申请
    • UNIFIED DUAL-MODE GSM/UMTS CLOCK
    • 统一双模GSM / UMTS时钟
    • WO2006124949A2
    • 2006-11-23
    • PCT/US2006019006
    • 2006-05-16
    • INTERDIGITAL TECH CORPKAEWELL JOHN DAVID JR
    • KAEWELL JOHN DAVID JR
    • H04B7/00H04B1/06
    • H04J3/0685H03L7/18
    • A unified dual-mode global system for mobile communication (GSM)/universal mobile telecommunication systems (UMTS) clock and a transceiver employing the unified GSM/UMTS clock are disclosed. A reference clock generates a reference clock signal and a local oscillator (LO) generates a LO signal based on the reference clock signal. A frequency divider selectively generates either a GSM clock signal or a UMTS clock signal by converting a frequency of the LO signal by a predetermined factor. Both the GSM clock signal and the UMTS clock signal are generated based on the common reference clock signal. The reference clock signal frequency may be a GSM fundamental frequency or a UMTS fundamental frequency. An interpolator and/or a decimator may be used for matching frequencies of UMTS baseband signal and the UMTS clock signal or frequencies of GSM baseband signal and the GSM clock signal.
    • 公开了用于移动通信(GSM)/通用移动电信系统(UMTS)时钟的统一双模全球系统和采用统一GSM / UMTS时钟的收发机。 参考时钟产生参考时钟信号,本地振荡器(LO)基于参考时钟信号产生LO信号。 分频器通过将LO信号的频率转换预定因子来选择性地产生GSM时钟信号或UMTS时钟信号。 基于公共参考时钟信号产生GSM时钟信号和UMTS时钟信号。 参考时钟信号频率可以是GSM基频或UMTS基频。 可以使用内插器和/或抽取器来匹配UMTS基带信号和UMTS时钟信号的频率或者GSM基带信号和GSM时钟信号的频率。