Wireless local area network having interface at each station which
ignores messages not retransmitted by repeater
    1.
    发明授权
    Wireless local area network having interface at each station which ignores messages not retransmitted by repeater 失效
    无线局域网在每个站具有接口,忽略不被中继器重传的消息

    公开(公告)号:US5818822A

    公开(公告)日:1998-10-06

    申请号:US341216

    申请日:1994-12-05

    IPC分类号: H04B5/00 H04L12/28 H04J3/24

    CPC分类号: H04B5/0018

    摘要: A wireless local area network includes a plurality of stations each comprising a data processing machine connected to a radio send-receive interface. Each data processing machine includes an interface controller for sending a message containing an address designating a destination station and for receiving messages addressed to it. The network further includes a repeater including a radio send-receive interface connected to a radiating cable passing near all the stations to receive all messages sent by the stations, to modify these messages to indicate that the message has passed through the repeater and to retransmit these messages over the radiating cable. The radio send-receive interface of each station ignores any messages not sent by the repeater. The wireless local area network finds an application in computer networking.

    摘要翻译: 无线局域网包括多个站,每个站包括连接到无线电发送 - 接收接口的数据处理机。 每个数据处理机器包括接口控制器,用于发送包含指定目标站的地址的消息,并且用于接收寻址到其的消息。 该网络还包括中继器,其包括连接到辐射电缆的无线电发送 - 接收接口,所述辐射电缆经过所有站点附近,以接收由站发送的所有消息,以修改这些消息以指示消息已经通过中继器并且重传这些消息 消息通过辐射电缆。 每个站的无线电发送接收接口忽略中继器未发送的任何消息。 无线局域网在计算机网络中找到应用。

    Communications system and corresponding equipment for a subscriber
installation
    2.
    发明授权
    Communications system and corresponding equipment for a subscriber installation 失效
    通信系统和用户安装的相应设备

    公开(公告)号:US5920801A

    公开(公告)日:1999-07-06

    申请号:US729393

    申请日:1996-10-11

    CPC分类号: H04B5/02 H04B5/0018

    摘要: The system includes centralizing communications equipment (4) provided with first transmitter-receiver means (5, 6) connected to at least one transmit and receive cable (3) for transmitting and receiving radio signals, which cable extends throughout the served installation. The system also includes subscriber terminal appliances (2A to 2E) located in the installation and provided with second transmitter and/or receiver means (8 to 12) for transmitting and/or receiving radio signals, which means enable the terminal appliances to communicate via the communications equipment. The communications equipment re-transmits the signals that it receives to each destination terminal appliance in the installation and, with the assistance of additional means (27 to 31), outside said installation. The subscriber terminal appliances and the centralizing communications equipment respectively include means enabling them to transmit and/or receive digitized information signals in the form of packets and via radio links.

    摘要翻译: 该系统包括集中通信设备(4),该设备具有连接到至少一个用于发送和接收无线电信号的至少一个发射和接收电缆(3)的第一发射机 - 接收机装置(5,6),该电缆在整个所提供的安装中延伸。 该系统还包括位于设备中的用户终端设备(2A至2E),并且设置有用于发射和/或接收无线电信号的第二发射机和/或接收机装置(8至12),这意味着终端设备可以经由 通讯设备。 通信设备在安装中重新发送其接收到的每个目的地终端设备的信号,并且在附加装置(27至31)的辅助下,在所述设备之外重新发送。 用户终端设备和集中通信设备分别包括使得它们能够以分组的形式经由无线电链路发送和/或接收数字化信息信号的装置。

    Method and apparatus for generating carriers for phase demodulation
having at least two phase states, and a corresponding demodulation stage
    3.
    发明授权
    Method and apparatus for generating carriers for phase demodulation having at least two phase states, and a corresponding demodulation stage 失效
    用于产生具有至少两个相位状态的相位解调载波的方法和装置以及相应的解调级

    公开(公告)号:US5838736A

    公开(公告)日:1998-11-17

    申请号:US585462

    申请日:1996-01-16

    IPC分类号: H04L27/227 H03D3/22 H04L27/22

    CPC分类号: H04L27/2275

    摘要: The apparatus and method pertain to generation of two receive carriers which are related to each other in quadrature. The apparatus and method employ a phase-shifter which generates one or more phase-shifted signals from a received signal. A signal selector selects a signal as a function of either a predetermined phase state associated with an initialization symbol during reception of the symbol or an estimated phase state estimated by a demodulation state on the basis of the received signal during reception of the message symbols such that the selected signal constitutes a receive carrier, which is also referred to as a reference carrier. In addition, the selected signal is stored and played back after a symbol duration before delivering the reference carrier. Finally, a second phase-shifter is used to generate a second receive carrier from the reference carrier.

    摘要翻译: 该装置和方法涉及生成与正交相关的两个接收载波。 该装置和方法采用从接收信号产生一个或多个相移信号的移相器。 信号选择器根据接收到消息符号期间的接收信号,选择一个信号,作为在接收符号期间与初始化符号相关联的预定相位状态或由解调状态估计的估计相位状态的函数,使得 所选择的信号构成接收载波,其也称为参考载波。 此外,所选择的信号在传送参考载波之前的符号持续时间之后被存储和重放。 最后,使用第二移相器从参考载波产生第二接收载波。