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    Tdma satellite communications system having special reference bursts
    91.
    发明授权
    Tdma satellite communications system having special reference bursts 失效
    具有特殊参考脉冲的TDMA卫星通信系统

    公开(公告)号：US3838221A

    公开(公告)日：1974-09-24

    申请号：US17079671

    申请日：1971-08-11

    Applicant: COMMUNICATIONS SATELLITE CORP ,  SCHMIDT & CLEMENS ,  MAILLET W ,  KOKUSAI DENSHIN DENWA CO LTD ,  GABBARD O ,  HUSTED J

    Inventor： NOSAKA K ,  HUSTED J ,  MAILLET W ,  SCHMIDT W ,  GABBARD O

    IPC: H04J3/00 ,  H04B7/15 ,  H04B7/212 ,  H04J3/06 ,  H04J3/07

    CPC classification number: H04B7/2128 ,  H04B7/2125 ,  Y02D70/00 ,  Y02D70/168 ,  Y02D70/446

    Abstract: In a satellite transponder communications system operating in a time division multiple access mode, each earth station transmits data in a burst format. All bursts within a single transponder frame are synchronized to a special reference burst which contains no data communications. A single earth station sends out the reference burst as well as its normal burst, and in the case of multi transponders and multi transponder frames, the single reference station sends out all of the reference bursts for the various transponder frames. Data to be transmitted may be received in many different forms and included within the same burst because of the modular arrangement of the earth stations. Individual terrestrial interface modules receive data in various forms, convert the data into bit form which is compatible with the TDMA system, store the converted bit stream and hold the compressed block of data until a multiplexer requests the block of data for inclusion into the earth station''s transmitted burst. The arrangement of blocks of data within a burst and the timing and duration of a burst is controlled by digital words stored in a memory. Complete reordering of burst times and the arrangement of blocks of data within a burst is accomplished by changing the words stored in the memory. A comparable system on the receive side of the earth station extracts blocks of data in selected bursts for conveyance to selected terrestrial interface modules.

    Abstract translation: 在以时分多址方式工作的卫星转发器通信系统中，每个地球站以突发格式发送数据。 单个转发器帧内的所有突发都同步到不包含数据通信的特殊参考突发。 单个地球站发出参考突发以及其正常突发，在多应答器和多应答器帧的情况下，单个参考站发送用于各种应答器帧的所有参考突发。 由于地球站的模块化布置，要发送的数据可以以许多不同的形式被接收并且被包括在相同的脉冲串内。 单独的地面接口模块以各种形式接收数据，将数据转换成与TDMA系统兼容的比特形式，存储转换的比特流并保存压缩的数据块，直到多路复用器请求数据块包含在地球站 传输突发 突发内的数据块的布置以及突发的定时和持续时间由存储在存储器中的数字字来控制。 通过改变存储在存储器中的字来完成突发时间的完全重排序和突发内的数据块的排列。 在地球站的接收侧的可比较的系统提取选定的脉冲串中的数据块，以便传送到选定的地面接口模块。

    Pulse stuffing control circuit for reducing jitter in tdm system
    92.
    发明授权
    Pulse stuffing control circuit for reducing jitter in tdm system 失效
    用于减少TDM系统中抖动的脉冲切换控制电路

    公开(公告)号：US3830981A

    公开(公告)日：1974-08-20

    申请号：US34719073

    申请日：1973-04-02

    Applicant: BELL NORTHERN RESEARCH LTD

    Inventor： GRUBER J ,  CHOW P ,  HOUGHTON J

    IPC: H04J3/07 ,  H04J3/06

    CPC classification number: H04J3/073

    Abstract: A pulse stuffing control circuit, for reducing waiting time jitter in a time division multiplex system, in which a sampling window is provided to determine the need for a stuffed pulse. The use of the window creates a higher frequency jitter component in the transmitted pulse stream which can be readily filtered out at the receiving terminal.

    Abstract translation: 一种脉冲填充控制电路，用于减少时分复用系统中的等待时间抖动，其中提供采样窗口以确定对填充脉冲的需要。 窗口的使用在发送的脉冲流中产生更高的频率抖动分量，其可以容易地在接收终端处滤除。

    Or correction of synchronisation faults for a switchable data transmission network operating on a time sharing basis
    93.
    发明授权
    Or correction of synchronisation faults for a switchable data transmission network operating on a time sharing basis 失效
    或用于可交换数据传输网络的同步故障的校正或时间共享基础

    公开(公告)号：US3830980A

    公开(公告)日：1974-08-20

    申请号：US34585373

    申请日：1973-03-29

    Applicant: PERON R ,  REVEL M

    Inventor： PERON R ,  REVEL M

    IPC: H04J3/06 ,  H04J3/07

    CPC classification number: H04J3/07 ,  H04J3/06

    Abstract: A switchable transmission system operating by time-sharing for data carrying digital information, comprises a distant exchange and a local exchange, whereof the timers are not strictly synchronous, and means of correcting the relative drift of these timers. The system employs means for correcting the repetitions or omissions of synchronization words. Means are incorporated in the distant exchange for the transmission of blank words on each transmission line between data-carrying words. The local exchange comprises three shift registers grouped in cascade and chronologically staggered with respect to each other, means for scanning words carrying digital information and for selectively connecting these scanning means to the said registers. The connecting means are controlled by repetitions or omissions of synchronization words, and by the reception of the blank words, in such manner as to make use, as the case may be, of the first or second registers or of the third and first registers, depending on the kind of synchronization error observed.

    Abstract translation: 通过用于承载数字信息的数据的分时工作的可切换传输系统包括远程交换和本地交换机，其定时器不是严格同步的，以及校正这些定时器的相对漂移的装置。 该系统采用用于校正同步字的重复或遗漏的装置。 手段被并入遥远的交换中，用于在数据携带单词之间的每条传输线上传输空白字。 本地交换机包括三个移位寄存器，它们以级联方式并且按时间顺序相互交错排列，用于扫描携带数字信息的单词并有选择地将这些扫描装置连接到所述寄存器的装置。 连接装置通过对同步字的重复或省略进行控制，并且通过接收空白字，以使得可以使用第一或第二寄存器或第三和第一寄存器的情况， 取决于所观察到的同步误差的种类。

    Arrangement for transmitting digital pulses through an analog tdm switching system
    94.
    发明授权
    Arrangement for transmitting digital pulses through an analog tdm switching system 失效
    通过模拟TDM交换系统发送数字脉冲的布置

    公开(公告)号：US3806654A

    公开(公告)日：1974-04-23

    申请号：US14691371

    申请日：1971-05-26

    Applicant: NORTH ELECTRIC CO

    Inventor： DOOLEY G ,  MONROE M

    IPC: H04J3/07 ,  H04Q11/04 ,  H04J3/06

    CPC classification number: H04J3/07 ,  H04Q11/04

    Abstract: A time division multiplex switching system for transmission of digital pulses from asynchronous pulse transmitters in which each incoming data stream is buffered until occurrence of an assigned time slot. During each such assigned time slot, a high speed clock subdivides the time slot into a plurality of subintervals during which data pulses and stuff pulses, as required, are transmitted through a switching matrix in a three level code. The data pulses are then detected, separated from the stuff pulses, and buffered. The original input pulse rate is regenerated and the data pulses are transmitted to the digital receivers at approximately such rate.

    Abstract translation: 一种用于从异步脉冲发射机传输数字脉冲的时分复用切换系统，其中每个输入数据流被缓冲，直到出现分配的时隙。 在每个这样分配的时隙期间，高速时钟将时隙细分成多个子间隔，在这些子间隔期间，根据需要通过三电平代码中的开关矩阵来发送数据脉冲和填充脉冲。 然后检测数据脉冲，与填充脉冲分离，并进行缓冲。 原始输入脉冲速率被重新生成，数据脉冲以大约这样的速率被发送到数字接收机。

    Apparatus for maintaining character synchronization in a data communication system
    95.
    发明授权
    Apparatus for maintaining character synchronization in a data communication system 失效
    用于在数据通信系统中维护字符同步的装置

    公开(公告)号：US3680051A

    公开(公告)日：1972-07-25

    申请号：US3680051D

    申请日：1970-07-29

    Applicant: HONEYWELL INF SYSTEMS

    Inventor： BLESSIN RONALD W ,  KENNEDY JAMES A

    IPC: H04J3/07 ,  G06F1/04

    CPC classification number: H04J3/07

    Abstract: Apparatus for maintaining character synchronization in a data communication system comprises a buffer to store characters being transferred from a communications controller to a terminal device, a shift register connected between the buffer and the terminal device and a source of fill characters which provides characters to fill any gap between message characters provided by the communications controller.

    Abstract translation: 用于在数据通信系统中维持字符同步的装置包括一个缓冲器，用于存储从通信控制器传送到终端设备的字符，连接在缓冲器和终端设备之间的移位寄存器和一个填充字符源， 由通信控制器提供的消息字符之间的差距。

    Pcm network synchronization
    96.
    发明授权
    Pcm network synchronization 失效
    PCM网络同步

    公开(公告)号：US3569631A

    公开(公告)日：1971-03-09

    申请号：US3569631D

    申请日：1968-05-07

    Applicant: BELL TELEPHONE LABOR INC

    Inventor： JOHANNES VIRGIL I ,  MAYO JOHN S ,  MCCULLOUGH RICHARD H

    IPC: H04J3/07 ,  H04J3/06

    CPC classification number: H04J3/07

    Abstract: Pulse signals from a plurality of unsynchronized sources are time-division multiplexed on a high-speed pulse transmission system having a pulse repetition rate submultiples of which are approximately equal to the repetition rate of the signals to be multiplexed. Multiplexing is accomplished by inserting control pulses or deleting pulse information from the pulse sources when necessary so as to maintain the pulse signals at a predetermined repetition rate equal to a submultiple of the line rate. The presence and location of the control pulses and the fact that deletion has occurred as well as whether a pulse or a space has been deleted from a particular pulse source are signalled to the receiving apparatus by transmitting signaling information in a predetermined channel space enabling the receiving apparatus to delete the control signals and restore any deleted signals.

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