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    • 2. 发明授权
    • Satellite repeater
    • 卫星中继器
    • US4456988A
    • 1984-06-26
    • US343181
    • 1982-01-27
    • Yukio NakagomeAkira OgawaYasuo HirataToshio Takahashi
    • Yukio NakagomeAkira OgawaYasuo HirataToshio Takahashi
    • H04B7/204H04B7/185H04J1/02
    • H04B7/2046
    • A satellite repeater for a digital satellite communication system for use on board of satellites. Receivers are provided with respective antennas for receiving radio-frequency signals from a plurality of ground stations. A signal processing circuit switches signals received in synchronism with stable clock timings. Transmitters receive the switched outputs of the signal processing circuit to provide radio-frequency signals for transmission through respective antennas of the transmitters. Timing detectors receive the outputs of the receivers and detect the frame timings of the output signals of the receivers. Signal storage circuits are provided between respective outputs of the receivers and the signal processing circuit for storing the respective output signals of the receivers by respective amounts. Control circuitry connected to the timing detectors, the signal storage circuits and the signal processing circuit control the storage operations of the signal storage circuits so that each of the frame timings of the received signals and the switching timing of the signal processing circuit have a desired timing relationship.
    • 一种用于卫星上的数字卫星通信系统的卫星中继器。 接收器设置有用于从多个地面站接收射频信号的相应天线。 信号处理电路以稳定的时钟定时同步接收接收的信号。 发射机接收信号处理电路的切换输出,以提供用于通过发射机的各个天线传输的射频信号。 定时检测器接收接收机的输出并检测接收机的输出信号的帧定时。 信号存储电路设置在接收机的各个输出端和信号处理电路之间,用于以相应的量存储接收机的相应输出信号。 连接到定时检测器,信号存储电路和信号处理电路的控制电路控制信号存储电路的存储操作,使得接收信号的每个帧定时和信号处理电路的切换定时都具有期望的定时 关系。