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- 11. 发明授权
  
  US06606307B1 Techniques for utilization of bandwidth space assets 有权
- 标题翻译：利用带宽空间资产的技术
- 公开(公告)号：US06606307B1
- 公开(公告)日：2003-08-12
- 申请号：US09432439
- 申请日：1999-11-02
- 申请人： Donald C. D. Chang , Kar W. Yung , David C. Cheng , Urban A. Von Der Embse , John I. Novak, III , Frank A. Taormina , Ming U. Chang
- 发明人： Donald C. D. Chang , Kar W. Yung , David C. Cheng , Urban A. Von Der Embse , John I. Novak, III , Frank A. Taormina , Ming U. Chang
- IPC分类号： H04B7185
- CPC分类号： H04B7/18521
- 摘要： Methods for operating a satellite constellation are disclosed that utilize spatial diversity and directional gain antennas at ground terminal locations to provide multiple data rate services on a single frequency channel. One method comprises receiving a signal at a first and second satellite in the satellite constellation from a first communications device. A communications channel at a first frequency from the first satellite is used to communicate with the first communications device. A signal from a second communications device is received only at the second satellite at the first frequency, and the second satellite is used to communicate with the second communications device at the first frequency without substantially interfering with the communications with the first communications device.
- 摘要翻译：公开了用于操作卫星星座的方法，其利用地面终端位置处的空间分集和方向增益天线在单个频率信道上提供多个数据速率业务。一种方法包括从第一通信设备在卫星星座中的第一和第二卫星处接收信号。来自第一卫星的第一频率的通信信道被用于与第一通信设备进行通信。来自第二通信设备的信号仅在第一频率处在第二卫星处被接收，并且第二卫星被用于以第一频率与第二通信设备通信，而基本上不干扰与第一通信设备的通信。

基本信息 PDF全文 PDF下载全文下载相似专利权利要求书说明书全文 Espacenet 法律信息同族专利专利引用

- 12. 发明授权
  
  US06388615B1 Micro cell architecture for mobile user tracking communication system 有权
- 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.

基本信息 PDF全文 PDF下载全文下载相似专利权利要求书说明书全文 Espacenet 法律信息同族专利专利引用

- 13. 发明授权
  
  US07068733B2 Sampling technique for digital beam former 失效
- 标题翻译：数字波束形成器采样技术
- 公开(公告)号：US07068733B2
- 公开(公告)日：2006-06-27
- 申请号：US09973270
- 申请日：2001-10-05
- 申请人： Donald C. D. Chang , Kar W. Yung , Urban A. Von der Embse
- 发明人： Donald C. D. Chang , Kar W. Yung , Urban A. Von der Embse
- IPC分类号： H04L9/00 , H04B7/185 , H01Q3/26 , H04N11/02
- CPC分类号： H04B7/18515 , H04B7/2041 , H04L1/02
- 摘要： A mobile satellite payload 18 and a method for sampling communication signals 26 are provided. The mobile satellite payload 18 uses a plurality of receive radiating elements 24 within a phase array antenna 22 to convert the communication signals 26 to received signals [S(t)]. A plurality of low noise amplifiers (LNAs) 28 amplify the received signals [S(t)] to then be received by a plurality of analog-to-digital (A/D) converters 29. The A/D converters 29 transform the received signals [S(t)] into digital baseband signals [S″(t)].
- 摘要翻译：提供了一种移动卫星有效载荷18和一种用于采样通信信号26的方法。移动卫星有效载荷18使用相位阵列天线22内的多个接收辐射元件24将通信信号26转换成接收信号[S（t）]。多个低噪声放大器（LNA）28放大接收到的信号[S（t）]，然后由多个模数（A / D）转换器29接收。 A / D转换器29将接收信号[S（t）]变换为数字基带信号[
  
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