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    • 41. 发明授权
    • Communication system with same frequency repeater station capability
    • 具有相同频率中继站能力的通信系统
    • US3753112A
    • 1973-08-14
    • US3753112D
    • 1972-02-23
    • BENDIX CORP
    • TEWKSBURY J
    • H04B7/15H04B1/48H04B1/54H04B7/17H04B7/18
    • H04B7/17H04B1/48H04B1/54
    • A communication system with same frequency repeater station capability operates on a single channel and generally includes at least one repeater station which receives and transmits simultaneously on a single frequency, and a plurality of remote receiver transmitting stations, all of which operate on the same frequency as the repeater station. The repeater station includes a continuously operating transmitter, the keying of which is controlled by a local oscillator. Each of the remote stations includes a similar transmitter which is normally quiescent, but which is energized for local modulation and transmission by a push-to-talk button. Each cycle of the repeater station oscillator is modified by pulses received from a remote transmitting station, to reduce or increase the period as needed to produce identical periods and synchronization in each oscillator. The pulses received at the repeater station are not perceptible during its own transmission and hence, no control is then exerted. Hence, an equilibrium condition is immediately established at the repeater station in which the departure from coincidence of transmitted and received pulses at the repeater station is proportioned to its need for control. The transmissions from the repeater station are received by the remote stations not then transmitting. Intelligent modulation of the pulse period at these receiving remote stations is then evident and may be recovered.
    • 具有相同频率中继站能力的通信系统在单个信道上操作,并且通常包括至少一个在单个频率上同时接收和发送的中继站,以及多个远程接收机发射站,所有这些都在与 中继站。 中继站包括连续操作的发射机,其键控由本地振荡器控制。 每个远程站包括一个类似的发射机,它通常是静止的,但是通过一键通按钮进行本地调制和传输。 中继站振荡器的每个周期由从远程发送站接收的脉冲修改,以减少或增加在每个振荡器中产生相同周期和同步所需的周期。 在中继站接收的脉冲在其自身传输期间不可察觉,因此不再施加控制。 因此,在中继站处立即建立平衡条件,其中在中继站的发射和接收脉冲的一致偏离与其对控制的需要成比例。 来自中继站的传输由远程站接收,而不是传输。 这些接收远程站的脉冲周期的智能调制很明显,可以恢复。