公开(公告)号：US07890052B2

公开(公告)日：2011-02-15

申请号：US11928577

申请日：2007-10-30

申请人： Donald C Chang ,  Alan Cha ,  Jacqueline C Chen ,  Frank A Hagen

发明人： Donald C Chang ,  Alan Cha ,  Jacqueline C Chen ,  Frank A Hagen

IPC分类号： H04M1/00 ,  H04B7/216 ,  H04B1/38 ,  H04B7/19 ,  H04B7/185 ,  H04W4/00 ,  H01Q1/28 ,  H01Q9/00 ,  H01Q3/00

CPC分类号： H04B7/18506

摘要： A communication system has a stratospheric platform with a payload controller and a phased array antenna having a plurality of main array elements for generating a plurality of communication beams and a plurality of auxiliary elements for canceling interference between the communication beams. A gateway station communicates with the stratospheric platform. The gateway station scales the plurality of elements to form a reconfigurable plurality of beams. The gateway station communicates an embedded control signal to the stratospheric platform to communicate a scaling of elements to form the communication beams and the auxiliary element output. The auxiliary element output is used to provide interference canceling.

摘要翻译： 通信系统具有带有有效载荷控制器的平流层平台和具有用于产生多个通信波束的多个主阵列元件和用于消除通信波束之间的干扰的多个辅助元件的相控阵天线。 网关站与平流层平台通信。 网关站缩放多个元素以形成可重构的多个波束。 网关站将嵌入的控制信号通信给平流层平台以传送元素的缩放以形成通信波束和辅助元件输出。 辅助元件输出用于提供干扰消除。

公开(公告)号：US07317916B1

公开(公告)日：2008-01-08

申请号：US09661725

申请日：2000-09-14

申请人： Donald C. D. Chang ,  Alan Cha ,  Jacqueline C. Chen ,  Frank A. Hagen

发明人： Donald C. D. Chang ,  Alan Cha ,  Jacqueline C. Chen ,  Frank A. Hagen

IPC分类号： H04Q7/20

CPC分类号： H04B7/18506

摘要： A communication system has a stratospheric platform with a payload controller and a phased array antenna having a plurality of main array elements for generating a plurality of communication beams and a plurality of auxiliary elements for canceling interference between the communication beam. A gateway station communicates with the stratospheric platform. The gateway station scales the plurality of elements to form a reconfigurable plurality of beams. The gateway station communicates an embedded control signal to the stratospheric platform to communicate a scaling of elements to form the communication beams and the auxiliary element output. The auxiliary element output is used to provide interference canceling.

摘要翻译： 通信系统具有带有有效载荷控制器和相控阵天线的平流层平台，该相控阵天线具有用于产生多个通信波束的多个主阵列元件和用于消除通信波束之间的干扰的多个辅助元件。 网关站与平流层平台通信。 网关站缩放多个元素以形成可重构的多个波束。 网关站将嵌入的控制信号通信给平流层平台以传送元素的缩放以形成通信波束和辅助元件输出。 辅助元件输出用于提供干扰消除。

公开(公告)号：US20080233884A1

公开(公告)日：2008-09-25

申请号：US11928577

申请日：2007-10-30

申请人： Donald C. D. Chang ,  Alan Cha ,  Jacqueline C. Chen ,  Frank A. Hagen

发明人： Donald C. D. Chang ,  Alan Cha ,  Jacqueline C. Chen ,  Frank A. Hagen

IPC分类号： H04B15/00

CPC分类号： H04B7/18506

摘要： A communication system has a stratospheric platform with a payload controller and a phased array antenna having a plurality of main array elements for generating a plurality of communication beams and a plurality of auxiliary elements for canceling interference between the communication beams. A gateway station communicates with the stratospheric platform. The gateway station scales the plurality of elements to form a reconfigurable plurality of beams. The gateway station communicates an embedded control signal to the stratospheric platform to communicate a scaling of elements to form the communication beams and the auxiliary element output. The auxiliary element output is used to provide interference canceling.

摘要翻译： 通信系统具有带有有效载荷控制器的平流层平台和具有用于产生多个通信波束的多个主阵列元件和用于消除通信波束之间的干扰的多个辅助元件的相控阵天线。 网关站与平流层平台通信。 网关站缩放多个元素以形成可重构的多个波束。 网关站将嵌入的控制信号通信给平流层平台以传送元素的缩放以形成通信波束和辅助元件输出。 辅助元件输出用于提供干扰消除。

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：US06763242B1

公开(公告)日：2004-07-13

申请号：US09661726

申请日：2000-09-14

申请人： Ying Feria ,  Ming Chang ,  Donald C. D. Chang ,  Frank A. Hagen ,  Alan Cha

发明人： Ying Feria ,  Ming Chang ,  Donald C. D. Chang ,  Frank A. Hagen ,  Alan Cha

IPC分类号： H04B700

CPC分类号： H04B7/18506

摘要： A communications system and method of operating the communications system includes a high altitude communication device that communicates with a plurality of user terminals and a gateway station. The gateway station couples the users to terrestrial networks and other users. The high altitude communication device has gateway station that assigns a first code to a beam of a first plurality of users. The gateway station continually determines whether an interference occurs between the first beam and the second beam by determining whether the first interference contour intersects the second interference contour when the first interference contour intersects the second interference contour. The gateway station declares an interference when the contours intersect and reassigns a second resource to the first beam.

摘要翻译： 通信系统和操作通信系统的方法包括与多个用户终端和网关站通信的高空通信设备。 网关站将用户耦合到地面网络和其他用户。 高空通信设备具有将第一代码分配给第一多个用户的波束的网关站。 当第一干涉轮廓与第二干涉轮廓相交时，通过确定第一干涉轮廓是否与第二干涉轮廓相交，连续地确定在第一光束和第二光束之间是否发生干涉。 当轮廓相交并将第二个资源重新分配给第一个波束时，网关站会声明干扰。

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：US06895217B1

公开(公告)日：2005-05-17

申请号：US09644224

申请日：2000-08-21

申请人： Donald C. D. Chang ,  Alan Cha

发明人： Donald C. D. Chang ,  Alan Cha

IPC分类号： H04B7/185 ,  H04B7/19

CPC分类号： H04B7/18504

摘要： A system has a stratospheric platform with a payload controller and a phased array antenna having a plurality of elements. A gateway station communicates with the stratospheric platform. The gateway station scales the plurality of elements to form a reconfigurable plurality of beams. The gateway station communicates a control signal to the stratospheric platform to communicate a scaling of the elements. The stratospheric platform configures the elements of the phased array antenna according to the scaling using adaptive interference rejection. The gateway station has an adaptive beam processor coupled to user position files. The adaptive beam processor with the user position data can adaptively cancel interference from other beams.

摘要翻译： 系统具有带有有效载荷控制器的平流层平台和具有多个元件的相控阵天线。 网关站与平流层平台通信。 网关站缩放多个元素以形成可重构的多个波束。 网关站将控制信号传送到平流层平台以传送元素的缩放。 平流层平台根据使用自适应干扰抑制的缩放来配置相控阵天线的元件。 网关站具有耦合到用户位置文件的自适应波束处理器。 具有用户位置数据的自适应波束处理器可以自适应地消除来自其他波束的干扰。

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：US06941138B1

公开(公告)日：2005-09-06

申请号：US09655498

申请日：2000-09-05

申请人： Donald C. D. Chang ,  Alan Cha

发明人： Donald C. D. Chang ,  Alan Cha

IPC分类号： H04B7/185 ,  H04W84/06 ,  H04Q7/20

CPC分类号： H04B7/18504 ,  H04W84/06

摘要： A method for communicating between a user terminal and multiple stratospheric transponder platforms includes the steps of positioning a plurality of stratospheric transponder platforms (102, 104, 106, 108) in a substantially fixed position (152) with respect to a user terminal antenna (116) coupled to a user terminal (117) and communicating between the user terminal (117) and at least two of the plurality of stratospheric transponder platforms (102, 104, 106, 108) concurrently.

摘要翻译： 一种在用户终端和多个平流层应答器平台之间通信的方法包括以下步骤：将多个平流层应答器平台（102,104,106,108）相对于用户终端天线（116）定位在基本上固定的位置（152） ）和用户终端（117）和所述多个平流层应答器平台（102,104,106,108）中的至少两个同时进行通信。

公开(公告)号：US06549166B2

公开(公告)日：2003-04-15

申请号：US09935471

申请日：2001-08-22

申请人： Arun Bhattacharyya ,  Alan Cha ,  James McKay

发明人： Arun Bhattacharyya ,  Alan Cha ,  James McKay

IPC分类号： H01Q138

CPC分类号： H01Q21/065 ,  H01Q9/0435 ,  H01Q9/0457

摘要： A patch antenna is disclosed having four ports for circular polarization that suppress the TM-02 mode, resulting in a radiation pattern that is symmetric. The axial ratio performance is consequently superior to that of two-port patch antennas. A four-port patch antenna includes a patch made of an electrically conductive material, a patch substrate coupled to the patch wherein the patch substrate is made of a dielectric material, a ground plane coupled to the patch substrate wherein the ground plane is made of an electrically conductive material having at least four slots formed therein, a feed substrate coupled to the ground plane wherein the feed substrate is made of a dielectric material, and a hybrid network coupled to the feed substrate that includes a right hand circularly polarized port, a left hand circularly polarized port, and two matched terminated ports.

摘要翻译： 公开了一种贴片天线，其具有用于圆偏振的四个端口，其抑制TM-02模式，导致对称的辐射图。 因此，轴比性能优于双端口贴片天线。 四端口贴片天线包括由导电材料制成的贴片，耦合到贴片的贴片衬底，其中贴片衬底由电介质材料制成，接地平面耦合到贴片衬底，其中接地面由 具有形成在其中的至少四个槽的导电材料，耦合到接地平面的进料基板，其中进料基板由介电材料制成，以及耦合到馈电基板的混合网络，其包括右手圆极化端口，左 手圆极化端口和两个匹配的终端端口。