公开(公告)号：US4506262A

公开(公告)日：1985-03-19

申请号：US398472

申请日：1982-07-15

申请人： Ian A. W. Vance ,  Colin Jeffrey ,  Brian A. Bidwell ,  David F. A. Leevers ,  Michael J. A. Woodley

发明人： Ian A. W. Vance ,  Colin Jeffrey ,  Brian A. Bidwell ,  David F. A. Leevers ,  Michael J. A. Woodley

IPC分类号： H04L7/033 ,  H04L7/04 ,  H04L7/08 ,  H04L7/10 ,  H04W88/02 ,  H04Q9/00 ,  H04B1/16

CPC分类号： H04W88/026 ,  H04L7/10 ,  H04L7/0331 ,  H04L7/046 ,  H04L7/08

摘要： A method of synchronizing a digital radio pager receiver with incoming digital data signals. At switch-on the receiver first attains a "course" bit synch during the first quarter-word period and then a "fine" bit synch during the next half-word period. The receiver then examines incoming data bits to determine simultaneously (a) whether valid data is being received and (b) whether the incoming data contains a preamble sequence. If either determination is successful the incoming data is then examined to determine whether it contains a synchronizing word or an address word. The synchronization and address word determination is also carried out while bit synch is obtained and the valid data/preamble determination is effected.

摘要翻译： 一种使数字无线寻呼机接收机与输入的数字数据信号同步的方法。 在接通时，接收机首先在第一个四分之一字周期期间达到“路由”位同步，然后在下一个半字周期期间“精细”同步。 接收机然后检查输入数据位以同时确定（a）是否正在接收有效数据，以及（b）输入数据是否包含前导码序列。 如果任一确定成功，则检查输入数据以确定其是否包含同步字或地址字。 同步和地址字确定也在获得位同步并执行有效的数据/前同步码确定的同时进行。

公开(公告)号：US5416779A

公开(公告)日：1995-05-16

申请号：US274581

申请日：1994-07-13

申请人： Nigel E. Barnes ,  Brian A. Bidwell ,  Andrew Bud ,  Malcolm Crisp ,  Michael T. Dudek ,  Rupert Goodings ,  David C. Odhams ,  Peter N. Proctor ,  Ian Rodgers

发明人： Nigel E. Barnes ,  Brian A. Bidwell ,  Andrew Bud ,  Malcolm Crisp ,  Michael T. Dudek ,  Rupert Goodings ,  David C. Odhams ,  Peter N. Proctor ,  Ian Rodgers

IPC分类号： H04J3/06 ,  H04L7/04 ,  H04M1/725 ,  H04M1/733 ,  H04B1/50

CPC分类号： H04M1/733 ,  H04M1/72505 ,  H04L7/041

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。