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    Communication system having frequency reuse in non-blocking manner
    1.
    发明授权
    Communication system having frequency reuse in non-blocking manner 有权
    具有无阻塞方式的频率复用的通信系统

    公开(公告)号：US06725013B1

    公开(公告)日：2004-04-20

    申请号：US09594375

    申请日：2000-06-15

    申请人： Donald C. D. Chang ,  Weizheng Wang ,  Ying Feria ,  Ming U. Chang ,  Harold A. Rosen ,  Wah L. Lim

    发明人： Donald C. D. Chang ,  Weizheng Wang ,  Ying Feria ,  Ming U. Chang ,  Harold A. Rosen ,  Wah L. Lim

    IPC分类号： H04B7185

    CPC分类号： H04B7/18508

    摘要： A communications system (10) and method of operating the communications system includes a high altitude communication device (12) that communicates with a plurality of user terminals and a gateway station (30). The gateway station (30) couples the users to terrestrial networks (32) and other users. The high altitude communication device (16) has a controller that generates a second beam having the first frequency to a service (26). The stratospheric platform (12) does not generate the second beam within a blocking area. User terminals within the service area outside the blocking area are configured to receive the first beam and the second beam.

    摘要翻译： 通信系统（10）和操作通信系统的方法包括与多个用户终端和网关站（30）通信的高空通信设备（12）。 网关站（30）将用户耦合到地面网络（32）和其他用户。 高空通信设备（16）具有控制器，该控制器产生具有第一频率的服务（26）的第二波束。 平流层平台（12）不会在阻挡区域内产生第二束。 阻挡区域外的服务区域内的用户终端被配置为接收第一光束和第二光束。

    GEO stationary communications system with minimal delay
    2.
    发明授权
    GEO stationary communications system with minimal delay 失效
    GEO固定通信系统延迟最小

    公开(公告)号：US07027769B1

    公开(公告)日：2006-04-11

    申请号：US09721854

    申请日：2000-11-22

    申请人： Harold A. Rosen ,  Donald C. D. Chang ,  Ming U. Chang ,  Weizheng Wang ,  John I. Novak, III ,  Wah L. Lim

    发明人： Harold A. Rosen ,  Donald C. D. Chang ,  Ming U. Chang ,  Weizheng Wang ,  John I. Novak, III ,  Wah L. Lim

    IPC分类号： H04B7/15

    CPC分类号： H04B7/18504

    摘要： A method for communicating and a communications system apparatus are disclosed. The apparatus comprises a communications platform and a gateway communicatively coupleable with a terrestrially-based network. The communications platform is disposed in a stratospheric location and transponds information between at least one of a plurality of user terminals and the gateway in essentially a bent pipe fashion. The method comprises the steps of receiving a first signal from the user terminal having an antenna in a stratospherically-based communication platform that maintains an apparent position relative to the user terminal within a beamwidth of a user terminal antenna and transponding the first signal from the stratospherically based communications platform to a gateway ground station.

    摘要翻译： 公开了一种通信方法和通信系统装置。 该装置包括通信平台和可与基于地面的网络通信地耦合的网关。 通信平台被布置在平流层位置，并且以基本上弯曲的管道方式在多个用户终端和网关中的至少一个之间传送信息。 该方法包括以下步骤：在基于平流层的通信平台中接收来自具有天线的用户终端的第一信号，该通信平台在用户终端天线的波束宽度内保持相对于用户终端的明显位置，并从平流层传送第一信号 基于通信平台的网关地面站。

    Micro cell architecture for mobile user tracking communication system
    3.
    发明授权
    Micro cell architecture for mobile user tracking communication system 有权
    移动用户跟踪通信系统的微小区架构

    公开(公告)号：US06914557B2

    公开(公告)日：2005-07-05

    申请号：US09947422

    申请日：2001-09-05

    申请人： Donald C. D. Chang ,  Ying Feria ,  Weizheng Wang ,  Alan G. Cha ,  Ming U. Chang ,  Frank A. Hagen ,  Kar W. Yung

    发明人： Donald C. D. Chang ,  Ying Feria ,  Weizheng Wang ,  Alan G. Cha ,  Ming U. Chang ,  Frank A. Hagen ,  Kar W. Yung

    IPC分类号： H04B7/06 ,  H04B7/08 ,  H04B7/185

    CPC分类号： H04B7/18504 ,  H04B7/0617 ,  H04B7/086

    摘要： A system and method for tracking a user. The system is adapted for use in a wireless communication system and creates a plurality of beams within a coverage area. A first beam is directed at a user in a first microcell and a number of additional beams illuminate microcells immediately adjacent the first microcell. The system is equipped with a mechanism for detecting movement of the user from the first microcell to one of the immediately adjacent microcells. On the detection of movement of the user, the system redirects the first beam from the first microcell to a second microcell, the second microcell being one of the adjacent microcells. In the illustrative embodiment, the system is implemented in a stratospheric platform based communication system including a hub adapted to communicate with a stratospheric platform. A transceiver and a phased array antenna are disposed on the platform to communicate with the hub and with the user. A second antenna is provided on the platform to communicate with the hub. Beamforming and direction are implemented on the hub and communicated to the platform. The user's position is detected with a global positioning system receiver, by measuring the strength of a signal received from the user, or by other suitable means. On detection of user movement from the first microcell, the beamforming system redirects the beam to follow the user into a second microcell. Additional beams around the user's microcell are illuminated to facilitate detection of the users movement.

    摘要翻译： 用于跟踪用户的系统和方法。 该系统适用于无线通信系统，并在覆盖区域内创建多个波束。 第一光束被引导到第一微小区中的用户，并且多个附加光束照亮紧邻第一微小区的微小区。 该系统配备有用于检测用户从第一微小区到紧邻的微小区之一的移动的机制。 在检测用户的移动时，系统将第一光束从第一微小区重定向到第二微小区，第二微小区是相邻微小区之一。 在说明性实施例中，该系统在基于平流层平台的通信系统中实现，其包括适于与平流层平台通信的集线器。 收发器和相控阵天线设置在平台上以与集线器和用户通信。 在平台上提供第二天线以与集线器通信。 波束形成和方向在集线器上实现并传达到平台。 通过测量从用户接收的信号的强度，或通过其他合适的方式，用全球定位系统接收机检测用户的位置。 在检测到来自第一微小区的用户移动时，波束成形系统重定向波束以跟随用户进入第二微小区。 用户微单元周围的附加光束被照亮以便于检测用户的移动。

    Architecture utilizing frequency reuse in accommodating user-link and feeder-link transmissions
    4.
    发明授权
    Architecture utilizing frequency reuse in accommodating user-link and feeder-link transmissions 有权
    利用频率重用在适应用户链路和馈线链路传输中的架构

    公开(公告)号：US06751458B1

    公开(公告)日：2004-06-15

    申请号：US09612465

    申请日：2000-07-07

    申请人： Weizheng Wang ,  Donald C. D. Chang ,  Ming U. Chang ,  Ying Feria ,  Alan Cha

    发明人： Weizheng Wang ,  Donald C. D. Chang ,  Ming U. Chang ,  Ying Feria ,  Alan Cha

    IPC分类号： H04Q720

    CPC分类号： H04B7/2041 ,  H04B7/18539

    摘要： A communication system has a high altitude communication device generating a plurality of user link beams having a first communication characteristic and a feeder link having a first communication characteristic. A gateway terminal receives the user link beam. A user terminal receives at least one of the user link beams. The plurality of user link beams comprises a first user link beam within a first cell and a first isolation zone outside the first cell. The plurality of user link beams comprises a second user link beam having the first communication characteristic and positioned within a second cell and a second isolation zone outside said second cell. The second isolation zone overlaps the first isolation zone. The feeder link is positioned within the first isolation zone and the second isolation zone. The feeder link has the first communication characteristic.

    摘要翻译： 通信系统具有生成具有第一通信特性的多个用户链路波束和具有第一通信特性的馈线链路的高空通信设备。 网关终端接收用户链路波束。 用户终端接收至少一个用户链路波束。 多个用户链路波束包括第一小区内的第一用户链路波束和第一小区外的第一隔离区域。 多个用户链路波束包括具有第一通信特性并位于第二小区内的第二用户链路波束和位于所述第二小区之外的第二隔离区域。 第二隔离区与第一隔离区重叠。 馈送链路位于第一隔离区和第二隔离区内。 馈线链路具有第一通信特性。

    Stratospheric platforms based mobile communications architecture
    6.
    发明授权
    Stratospheric platforms based mobile communications architecture 有权
    基于平流层平台的移动通信架构

    公开(公告)号：US06756937B1

    公开(公告)日：2004-06-29

    申请号：US09588395

    申请日：2000-06-06

    申请人： Donald C. D. Chang ,  Ming U. Chang ,  Ying Feria ,  Weizheng Wang ,  Alan Cha ,  Kar W. Yung ,  Frank A. Hagen

    发明人： Donald C. D. Chang ,  Ming U. Chang ,  Ying Feria ,  Weizheng Wang ,  Alan Cha ,  Kar W. Yung ,  Frank A. Hagen

    IPC分类号： H04B7185

    CPC分类号： H04B7/18504 ,  H04B7/2041

    摘要： A communication system including a first transceiver located on a first platform at a predetermined altitude. A first antenna is located on the first platform and connected to the first transceiver. A second antenna is connected to the other end of the first transceiver. A second transceiver is located on a ground hub physically and independent of the first platform. A third antenna is located on the ground hub and connected to the second transceiver. The third antenna is adapted to communicate with the second antenna. The first platform is maintained in a stratospheric orbit. A beamforming system is connected to the second transceiver and mounted on the ground hub. The beamforming system provides a beamformed signal from the second transceiver to the first transceiver effective to drive the first array antenna to radiate multiple beams to a surface, whereby the multiple beams create time varying and dissimilar footprints thereon. A second antenna is mounted on the first platform to receive the beamformed signal from the ground hub. The beamforming system is adapted to drive the first antenna to generate plural beams on the earth's surface, each beam providing a respective footprint or cell. Each beam tracks a respective user located at a center of each cell. The system allows for narrow beams to be created which, in turn, enables frequency reuse. A code is assigned to each beam and a mechanism is provided for preventing a user from receiving more than one beam with a given code. This mechanism is adapted to anticipate a condition by which a user will move to a location at which the user would receive more than one beam with a given code. The mechanism will quickly assign a second code to at least one beam prior to the arrival of the user at that position.

    摘要翻译： 一种通信系统，包括位于第一平台上的预定高度的第一收发器。 第一天线位于第一平台上并连接到第一收发器。 第二天线连接到第一收发器的另一端。 第二收发器位于物理上和独立于第一平台的地面集线器上。 第三个天线位于地面集线器上并连接到第二个收发器。 第三天线适于与第二天线通信。 第一个平台保持在平流层轨道上。 波束成形系统连接到第二收发器并且安装在地面集线器上。 波束形成系统提供来自第二收发器的波束形成的信号到第一收发器，其有效地驱动第一阵列天线以将多个波束辐射到表面，由此多个波束在其上产生时变和不同的足迹。 第二天线安装在第一平台上以从地面集线器接收波束形成的信号。 波束形成系统适于驱动第一天线以在地球表面上产生多个波束，每个波束提供相应的覆盖区或小区。 每个光束跟踪位于每个单元的中心的相应用户。 该系统允许创建窄波束，这反过来使得能够进行频率重用。 代码被分配给每个波束，并且提供了一种用于防止用户以给定代码接收多于一个波束的机制。 该机制适于预测用户将移动到用户将使用给定代码接收多于一个的一个位置的状况。 该机制将在用户到达该位置之前在至少一个波束上快速分配第二代码。

    Multiple basestation communication system having adaptive antennas
    9.
    发明授权
    Multiple basestation communication system having adaptive antennas 有权
    具有自适应天线的多个基站通信系统

    公开(公告)号：US07187949B2

    公开(公告)日：2007-03-06

    申请号：US09858956

    申请日：2001-05-15

    申请人： Donald C. D. Chang ,  Wah L. Lim ,  Ming U. Chang

    发明人： Donald C. D. Chang ,  Wah L. Lim ,  Ming U. Chang

    IPC分类号： H04M1/00

    CPC分类号： H04W16/28 ,  H01Q1/246 ,  H01Q3/2605 ,  H01Q25/00 ,  H04B7/0408 ,  H04W16/26 ,  H04W84/14 ,  H04W88/085

    摘要： A communication system has a first plurality of wireless basestations having adaptive antennas with a plurality of main array antenna elements for generating a plurality of communication beams. The system further includes a gateway station coupled to the first plurality of wireless basestations. The gateway station forms a plurality of beam commands by communicating a plurality of control signals to the first plurality of wireless basestations to form the communication beams. A second plurality of wireless base stations having a second plurality of adaptive antennas with a second plurality of main array antenna elements for generating a plurality of communication beams to communicate with said mobile user and a fixed user. The beams include a first link and a second link from the first plurality of basestations that communicate with the fixed user terminal and a third link and fourth link from the second plurality of wireless basestations to communicate with the mobile user terminal.

    摘要翻译： 通信系统具有第一多个无线基站，其具有多个主阵列天线元件的自适应天线，用于产生多个通信波束。 系统还包括耦合到第一多个无线基站的网关站。 网关站通过将多个控制信号传送到第一多个无线基站来形成多个波束命令，以形成通信波束。 具有第二多个自适应天线的第二多个无线基站，具有第二多个主阵列天线元件，用于产生与所述移动用户和固定用户通信的多个通信波束。 波束包括来自与固定用户终端通信的第一多个基站的第一链路和第二链路，以及来自第二多个无线基站的第三链路和第四链路以与移动用户终端通信。