Frequency-modulated signal receiver with digital demodulator
    1.
    发明申请
    Frequency-modulated signal receiver with digital demodulator 有权
    带数字解调器的调频信号接收机

    公开(公告)号:US20020168028A1

    公开(公告)日:2002-11-14

    申请号:US10103575

    申请日:2002-03-21

    CPC classification number: H04L27/1566

    Abstract: A receiver of a frequency-modulated signal is provided. The receiver includes a frequency-transposition unit for lowering the frequency of the frequency-modulated signal, and a digital demodulator for regenerating a digital signal from the frequency-transposed signal. The frequency-transposition unit includes a local oscillator for generating a local oscillator signal used in lowering the frequency of the frequency-modulated signal. The frequency-transposed signal is sampled in the digital demodulator at the rate of a sampling signal, and the sampling signal is generated by the local oscillator of the frequency-transposition unit. In a preferred embodiment, the local oscillator includes at least one frequency-divider circuit that delivers the sampling signal. Also provided is a method for regenerating a digital signal from a frequency-modulated signal.

    Abstract translation: 提供了调频信号的接收机。 接收机包括用于降低频率调制信号的频率的频率转置单元和用于从频率转置信号再生数字信号的数字解调器。 频率转置单元包括本地振荡器,用于产生用于降低频率调制信号的频率的本地振荡器信号。 在数字解调器中以采样信号的速率采样频移信号,采样信号由频移单元的本地振荡器产生。 在优选实施例中,本地振荡器包括传送采样信号的至少一个分频器电路。 还提供了一种从频率调制信号再生数字信号的方法。

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