Time division duplex telecommunication system
    1.
    发明授权
    Time division duplex telecommunication system 失效
    时分双工电信系统

    公开(公告)号:US5416779A

    公开(公告)日:1995-05-16

    申请号:US274581

    申请日:1994-07-13

    摘要: A communication procedure suitable for a cordless telephone system involves time division duplex radio communication between a handset 11 and a base station 3 using alternating bursts of transmission over a single radio channel. Once a radio link has been set up, initial transmissions carry a synchronisation logical channel S and a signalling logical channel D multiplexed together, but the link may switch to bursts carrying a communications logical channel B for the speech data and the signalling logical channel D. Burst synchronisation is achieved by the asynchronous detection of words in a synchronisation channel S. These words have bit patterns reducing the probability of incorrect asynchronous detection of them. If one part ceases to receive handset signals from the other, it transmits a special signal, informing the other part. This enables both parts to detect the failure of a link at substantially the same time, so that their actions to re-establish the link are synchronised.

    摘要翻译: 适用于无绳电话系统的通信过程涉及手机11和基站3之间的时分双工无线电通信,其使用在单个无线电信道上的交替突发传输。 一旦建立无线电链路,初始传输携带同步逻辑信道S和复用在一起的信令逻辑信道D,但是链路可以切换到承载语音数据和信令逻辑信道D的通信逻辑信道B的突发。 突发同步通过异步检测同步信道S中的字来实现。这些字具有减少它们不正确异步检测的可能性的位模式。 如果一个部分停止从另一个部分接收手机信号,它会发送一个特殊信号,通知另一部分。 这使得两个部件能够在基本相同的时间检测到链路的故障,使得它们重新建立链路的动作被同步。

    Digital data transmission systems
    5.
    发明授权
    Digital data transmission systems 失效
    数字数据传输系统

    公开(公告)号:US4383324A

    公开(公告)日:1983-05-10

    申请号:US204289

    申请日:1980-11-05

    CPC分类号: H04L25/03019 H04L27/2273

    摘要: In a receiver arrangement for a quadrature phase-shift digital data transmission system including an adaptive equalizing regenerator, a phase control signal for the local oscillator is derived from an output of the regenerator and decision feedback signals within the regenerator are applied by way of balanced current switching circuits.

    摘要翻译: 在包括自适应均衡再生器的正交相移数字数据传输系统的接收器装置中,从再生器的输出导出本地振荡器的相位控制信号,再生器内的判定反馈信号通过平衡电流 开关电路。