公开(公告)号：US07200360B1

公开(公告)日：2007-04-03

申请号：US09594374

申请日：2000-06-15

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

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

IPC分类号： H04B7/185

CPC分类号： H04B7/18504 ,  H04B7/19

摘要： A communications system (10) and method of operating the communications system includes a first stratospheric platform generating a second beam having a frequency the same as a satellite beam to the same service area. User terminals are configured to receive the first beam or the second beam.

摘要翻译： 通信系统（10）和操作通信系统的方法包括：第一平流层平台，产生具有与卫星波束相同频率的第二波束到同一服务区域。 用户终端被配置为接收第一光束或第二光束。

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。

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。

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。

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。

公开(公告)号：US06829479B1

公开(公告)日：2004-12-07

申请号：US09615894

申请日：2000-07-14

申请人： Donald C. D. Chang ,  Ming U. Chang ,  Ying Feria ,  Harold Rosen

发明人： Donald C. D. Chang ,  Ming U. Chang ,  Ying Feria ,  Harold Rosen

IPC分类号： H04Q720

CPC分类号： H04B7/18504

摘要： A method and system for communicating includes a plurality of cells having base units therein. Each of the base units communicates with a plurality of users within the cells. A communications platform is located in a stratospheric location for transmitting and receiving information with respect to the base units. A gateway station communicates with the communications platform and routes signals to terrestrial networks or other user back through the communications platform. A microcell within at least one of the cells is used to provide coverage in a small geographic area such as within a building. Each of the microcells is also in communication with the gateway station through the platform.

公开(公告)号：US06388615B1

公开(公告)日：2002-05-14

申请号：US09587758

申请日：2000-06-06

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

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

IPC分类号： H01Q322

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.

公开(公告)号：US06868269B1

公开(公告)日：2005-03-15

申请号：US09649355

申请日：2000-08-28

申请人： Frank A. Hagen ,  Ying Feria ,  Kar Yung ,  Weizheng Wang ,  Donald C. D. Chang

发明人： Frank A. Hagen ,  Ying Feria ,  Kar Yung ,  Weizheng Wang ,  Donald C. D. Chang

IPC分类号： H04B7/185 ,  H04W16/00 ,  H04Q7/20

CPC分类号： H04B7/18504 ,  H04W16/00

摘要： A method for integrating coverage areas of multiple transponder platforms includes the step of arranging a plurality of coverage areas in a cluster wherein each of the plurality of coverage areas is assigned a color that differs from that of every other coverage area in a same cluster and wherein each of the plurality of coverage areas overlaps at least one other coverage area in the same cluster for maximizing utilization of multiple system resources.

摘要翻译： 一种用于集成多个应答器平台的覆盖区域的方法包括在群集中布置多个覆盖区域的步骤，其中，多个覆盖区域中的每一个被分配与同一群集中的每个其他覆盖区域的颜色不同的颜色，其中 多个覆盖区域中的每一个与同一群集中的至少一个其他覆盖区域重叠，以最大化多个系统资源的利用率。

公开(公告)号：US06567052B1

公开(公告)日：2003-05-20

申请号：US09718973

申请日：2000-11-21

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

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

IPC分类号： H01Q300

CPC分类号： H01Q1/28 ,  H01Q3/02

摘要： A stratospheric platform communication system (10) having antenna boresight angles (EL, AZ) that can be adjusted by an adjustable payload antenna (40) according to the requirements of a specific application. The present invention provides an efficient use of available resources by allowing platform systems (10) and GEO satellite systems to share the radio frequency spectrum without interference, and improves the coverage area provided by a stratospheric platform system by allocating stratospheric platforms (12) to specific coverage areas in combination thereby increasing coverage capacity in high traffic areas.

摘要翻译： 具有可根据特定应用的要求由可调节有效载荷天线（40）调节的具有天线视轴角（EL，AZ）的平流层平台通信系统（10）。 本发明通过允许平台系统（10）和GEO卫星系统在没有干扰的情况下共享无线电频谱来提供可用资源的有效使用，并且通过将平流层平台（12）分配给特定的平流层平台系统来提高由平流层平台系统提供的覆盖区域 覆盖区域相结合，从而提高高交通区域的覆盖能力。

公开(公告)号：US07046718B1

公开(公告)日：2006-05-16

申请号：US09669095

申请日：2000-09-25

申请人： Kar Yung ,  Frank A. Hagen ,  Ying Feria ,  Donald C. D. Chang

发明人： Kar Yung ,  Frank A. Hagen ,  Ying Feria ,  Donald C. D. Chang

IPC分类号： H04B1/69 ,  H03D3/24

CPC分类号： H04B7/18589 ,  H03J1/00 ,  H04B1/7097

摘要： A method for coherent phase synchronous CDMA communications between a gateway and multiple subscribers via multiple transponder platforms that includes the step of synchronizing a local reference clock for each subscriber in a service area to a single master reference clock for multiple transponder platforms wherein the distance separating the transponder platforms is constrained to a range wherein the local reference clocks for all subscribers have substantially the same phase with respect to the master reference clock.

摘要翻译： 一种用于经由多个应答器平台的网关和多个用户之间的相干相位同步CDMA通信的方法，其包括将服务区域中的每个用户的本地参考时钟同步到多个应答器平台的单个主参考时钟的步骤，其中， 应答器平台被限制到一个范围，其中所有用户的本地参考时钟相对于主参考时钟具有基本上相同的相位。