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    • 18. 发明授权
    • Microwave relay station having a common standby channel for signals of
different types of modulation
    • 微波中继站具有用于不同类型调制信号的公共备用信道
    • US4878228A
    • 1989-10-31
    • US880789
    • 1986-07-01
    • Kunihiko Takahashi
    • Kunihiko Takahashi
    • H04B1/74H04L1/22H04L27/00
    • H04L27/0008H04L1/22
    • A multichannel microwave relay station has first and second channels for respectively transmitting signals of different types of modulation, such as QAM and FM modulated signals. These different types of signal rely on a common standby transmission channel that is selectively capable of transmitting the different types of signals. The type of signal currently carried by the standby channel is automatically identified by a detector circuit, such as one that can automatically distinguish differences in the frequency spectrums of the different types of signals. A selecting circuit responds to the output of the detector circuit by selecting between first and second transmitting devices in the common channel, thereby dedicating it to the identified type of signal.
    • 多通道微波中继站具有用于分别传输诸如QAM和FM调制信号的不同类型调制信号的第一和第二信道。 这些不同类型的信号依赖于选择性地能够发送不同类型的信号的公共待机传输信道。 备用信道当前承载的信号的类型由检测器电路自动识别,例如可以自动区分不同类型的信号的频谱的差异的信号。 选择电路通过在公共信道中的第一和第二发送设备之间进行选择来对检测器电路的输出进行响应,从而将其专用于所识别的信号类型。