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36 条记录 (耗时 0.05 秒)

    Alternating sequential half duplex communication system
    1.
    发明授权
    Alternating sequential half duplex communication system 失效
    交替顺序半双工通信系统

    公开(公告)号：US4979170A

    公开(公告)日：1990-12-18

    申请号：US145176

    申请日：1988-01-19

    申请人： Klein S. Gilhousen ,  Franklin P. Antonio ,  Irwin M. Jacobs ,  Lindsay A. Weaver, Jr.

    发明人： Klein S. Gilhousen ,  Franklin P. Antonio ,  Irwin M. Jacobs ,  Lindsay A. Weaver, Jr.

    IPC分类号： G02B6/293 ,  G02B6/34 ,  G02B6/42 ,  H01S3/08 ,  H01S5/14 ,  H01S5/40 ,  H04B1/7136 ,  H04B7/212 ,  H04B10/155 ,  H04L5/16

    CPC分类号： H04B1/7136 ,  G02B6/12007 ,  G02B6/2931 ,  G02B6/29328 ,  G02B6/29383 ,  G02B6/4206 ,  G02B6/4246 ,  G02B6/4249 ,  G02B6/425 ,  H01S3/08009 ,  H01S5/141 ,  H04B10/506 ,  H04B7/212 ,  H04L5/16 ,  G02B6/29334 ,  H01S5/4025 ,  H01S5/4062 ,  H01S5/4087

    摘要： A message communication system employing one or more centralized communication stations transferring messages through Earth orbit repeater satellites to or from mobile terminals with at least one central communication station having a first transceiver for transmitting a first communication signal to one or more mobile terminals and at least one mobile terminal having a second transceiver for receiving the first communication signal and demodulating it, and for transmitting at a predetermined duty cycle of the second transceiver, a second communication signal to at least one of the central communication stations. The preferred duty cycle over which the second communication signal is transmitted is about fifty percent of the second transceiver duty cycle. The communication system uses Time Division Multiplexed (TDM) communication signals using a number of channels as designated address channels with the remainder being used for data transfer. Information transmitted on the address channels is used by terminals to determine both the presence of a message and its corresponding data transmission or reception channel. In addition the terminals use the reception of the first communication signal to adjust return link transmission frequency to compensate for transmission path errors. The alternating duty cycle allows mobile terminals to use a single set of local oscillators for both transmission and reception modes of operation. To decrease interference with other systems the present system employs a power dispersal modulation function to achieve the footprint of a video signal for high transfer rate digital communication signals.

    摘要翻译： 一种消息通信系统，其采用一个或多个集中式通信站，其中至少一个中央通信站通过地​​球轨道中继卫星向移动终端传送消息，所述至少一个中央通信站具有用于将第一通信信号发送到一个或多个移动终端的第一收发器和至少一个 移动终端具有用于接收第一通信信号并对其进行解调的第二收发器，并且用于以第二收发器的预定占空比发送第二通信信号到至少一个中央通信站。 发送第二通信信号的优选占空比大约是第二收发器占空比的百分之五十。 通信系统使用时分复用（TDM）通信信号，使用多个信道作为指定地址信道，其余部分用于数据传输。 在地址信道上发送的信息被终端用于确定消息的存在及其对应的数据发送或接收信道。 此外，终端使用第一通信信号的接收来调整返回链路传输频率以补偿传输路径错误。 交替占空比允许移动终端在传输和接收操作模式下使用单组本地振荡器。 为了减少与其他系统的干扰，本系统采用功率分散调制功能来实现高传输速率数字通信信号的视频信号的覆盖区。

    Adaptive sectorization in a spread spectrum communication system
    2.
    发明授权
    Adaptive sectorization in a spread spectrum communication system 失效
    扩频通信系统中的自适应扇区化

    公开(公告)号：US5621752A

    公开(公告)日：1997-04-15

    申请号：US265664

    申请日：1994-06-23

    申请人： Franklin P. Antonio ,  Klein S. Gilhousen ,  Jack K. Wolf ,  Ephraim Zehavi

    发明人： Franklin P. Antonio ,  Klein S. Gilhousen ,  Jack K. Wolf ,  Ephraim Zehavi

    IPC分类号： H01Q3/24 ,  H01Q3/26 ,  H04B1/7085 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/26 ,  H04L1/06 ,  H04W16/28 ,  H04B15/00 ,  H04K1/00 ,  H04L27/30

    CPC分类号： H04W16/28 ,  H04B1/7085 ,  H04B1/712 ,  H04B1/7117

    摘要： A system and method for adaptively sectorizing channel resources within a digital cellular communication system is disclosed herein. The system includes an antenna arrangement for providing at least first and second electromagnetic beams for receiving a first information signal transmitted by a specific one of a plurality of users, thereby generating first and second received signals. A first set of beam-forming signals are then generated from the first and second received signals. A demodulating receiver is provided for demodulating at least first and second beam-forming signals included within the first set of beam-forming signals, thereby producing first and second demodulated signals. The system further includes a tracking network for tracking multipath information signals, received from various positions and angles of incidence, based on comparison of the first and second demodulated signals.

    摘要翻译： 本文公开了一种用于在数字蜂窝通信系统内自适应地划分信道资源的系统和方法。 该系统包括用于提供至少第一和第二电磁波束的天线装置，用于接收由多个用户中的特定一个用户发送的第一信息信号，从而产生第一和第二接收信号。 然后从第一和第二接收信号产生第一组波束形成信号。 解调接收机被提供用于解调包括在第一组波束形成信号内的至少第一波束形成信号和第二波束形成信号，从而产生第一和第二解调信号。 基于第一和第二解调信号的比较，系统还包括用于跟踪从各种位置和入射角接收的多路径信息信号的跟踪网络。

    System and method for reducing interference generated by a digital communication device
    3.
    发明授权
    System and method for reducing interference generated by a digital communication device 失效
    用于减少由数字通信设备产生的干扰的系统和方法

    公开(公告)号：US5917812A

    公开(公告)日：1999-06-29

    申请号：US632875

    申请日：1996-04-16

    申请人： Franklin P. Antonio ,  Klein S. Gilhousen

    发明人： Franklin P. Antonio ,  Klein S. Gilhousen

    IPC分类号： H04J3/00 ,  H04B1/04 ,  H04B7/26 ,  H04B15/00 ,  H04B15/02

    CPC分类号： H04B15/02

    摘要： A system and method for reducing radio frequency interference arising in connection with pulsed transmission over time division multiplexed communication channels. In a first embodiment, a subscriber station is nominally assigned all of the slots of each frame of a first transmit channel. By transmitting RF energy substantially continuously, the subscriber station reduces interference arising from pulsed transmission. In a second embodiment, a subscriber station is nominally assigned one or more slots of each frame of a primary channel for conventional transmission of useful information, and is also instructed to continuously transmit RF energy over an auxiliary channel at times other than during the assigned primary channel slots. In this way, interference generated in the vicinity of the subscriber station is reduced due to the substantially continuous transmission of RF energy by the subscriber station. More than one subscriber station may simultaneously utilize the auxiliary channel during reduced interference mode operation.

    摘要翻译： 一种用于在时分复用通信信道上减少与脉冲传输有关的射频干扰的系统和方法。 在第一实施例中，用户台名义地分配了第一传输信道的每个帧的所有时隙。 通过基本连续地发射RF能量，用户站减少了由脉冲传输引起的干扰。 在第二实施例中，订户站被标称地分配主信道的每个帧的一个或多个时隙用于有用信息的常规传输，并且还被指示在辅助信道上连续地发送RF能量，而不是在分配的初级 通道槽。 以这种方式，由于用户台的RF能量的基本上连续的传输，在用户站附近产生的干扰减少了。 在减少的干扰模式操作期间，多于一个用户站可以同时利用辅助信道。

    Multiplexed address control in a TDM communication system
    7.
    发明授权
    Multiplexed address control in a TDM communication system 失效
    TDM通信系统中的复用地址控制

    公开(公告)号：US4928274A

    公开(公告)日：1990-05-22

    申请号：US144905

    申请日：1988-01-19

    申请人： Klein S. Gilhousen ,  Franklin P. Antonio

    发明人： Klein S. Gilhousen ,  Franklin P. Antonio

    IPC分类号： H04B7/212 ,  H04J3/00 ,  H04J3/16 ,  H04J3/24 ,  H04Q7/06 ,  H04Q7/08 ,  H04Q7/12 ,  H04Q7/18 ,  H04Q7/38

    CPC分类号： H04J3/16 ,  H04B7/212 ,  H04J3/24

    摘要： A message communication system employing one or more centralized communication stations transmitting messages through Earth orbit relay satellites to mobile receivers utilizing Time Division Multiplexed (TDM) communication signals having signal time frames divided into a series of transmission channels. A predetermined number of the channels are designated as address channels with the remainder being used for data transfer. Information transmitted on the address channels is used by receivers to determine both the presence of a message and its corresponding data transmission channel. Each system receiver scans, and tracks only the communication signal address channels until a message addressed to that receiver is detected, at which time the selected receiver changes channels to the designated data channel for reception of the message. Thus, demodulation of the entire communication signal is not required and processing time and power is reduced for the typical waiting condition when messages are not being received. While a message is being received only a portion of the communication signal need to be received, demodulated and decoded. The decoded message is then displayed on a display screen or similar device for the recipient.

    摘要翻译： 一种消息通信系统，其采用一个或多个集中式通信站通过地​​球轨道中继卫星向具有被分成一系列传输信道的信号时分帧的时分多路复用（TDM）通信信号的移动接收机传送消息。 预定数量的信道被指定为地址信道，其余的用于数据传送。 在地址信道上发送的信息被接收机用于确定消息的存在及其对应的数据传输信道。 每个系统接收机扫描并且仅跟踪通信信号地址信道，直到检测到寻址到该接收机的消息，此时所选择的接收机将信道改变到指定的数据信道以接收消息。 因此，当不接收到消息时，对于典型的等待条件，不需要解调整个通信信号，并且处理时间和功率被降低。 当接收到消息时，仅需要接收，解调和解码通信信号的一部分。 然后，解码的消息被显示在用于接收者的显示屏幕或类似设备上。