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1. 发明授权

US5142291A Passive microwave near-field tomographic imaging system and method 失效
标题翻译：被动微波近场成像系统及方法
公开(公告)号：US5142291A
公开(公告)日：1992-08-25
申请号：US563129
申请日：1990-08-03
申请人： Donald C. D. Chang , Joseph G. Gurley , Frank A. Hagen , Samuel C. Reynolds , Kar W. Yung
发明人： Donald C. D. Chang , Joseph G. Gurley , Frank A. Hagen , Samuel C. Reynolds , Kar W. Yung
IPC分类号： G01K11/00
CPC分类号： G01K11/006
摘要： A technique for near-field tomographic imaging using a multiple-receiver correlating interferometer. A target object or scene to be imaged is located in a near-field or Fresnel region of a receiver system. The target object radiates or reflects a signal that is sensed by a plurality of antennas. The received signals are correlated using conventional correlation algorithms. An image pixel for a focal point is then computed by correcting a differential time delay between a signal emitted at the focal point and received at first and second antennas. The system is focused on the target object by correcting a phase term of the correlation algorithms. The phase term is corrected by multiplying the correlation algorithms by a phase factor. A peak correlated value is developed when the focal point is at the target object location. A series of snapshots is generated from data produced by the focussing process, as the focal point is moved through the scene. The snapshots are successively superimposed, using tomographic techniques, to form a high resolution image map. The system achieves extremely high resolutions, rivalling those of synthetic aperture radar.

2. 发明授权

US07215954B1 Resource allocation method for multi-platform communication system 有权
标题翻译：多平台通信系统的资源分配方法
公开(公告)号：US07215954B1
公开(公告)日：2007-05-08
申请号：US09587960
申请日：2000-06-06
申请人： Kar W. Yung , Frank A. Hagen , Donald C. D. Chang
发明人： Kar W. Yung , Frank A. Hagen , Donald C. D. Chang
IPC分类号： H04Q7/20
CPC分类号： H04B7/18539
摘要： A mobile wireless communications system including a plurality of individual transponding nodes of various types, all in communication with a central processing hub. A local user signal is processed by the central processing hub and radiated through multiple paths to a plurality of the plurality of individual transponding platforms simultaneously. The signal is then re-radiated by each of the plurality of the plurality of individual transponding platforms to a mobile terminal that receives the re-radiated signal from the plurality of the plurality of individual transponding platforms coherently and in phase. The number of transponders and codes used to transmit each user signal can be readily adapted to user requirements. Additionally, each user is assigned a profit value by the central processing hub depending upon certain user characteristics. The assigned user profit value allows the total system utility/profitability to be maximized.
摘要翻译：一种移动无线通信系统，包括多个各种类型的单个转发节点，全部与中央处理集线器通信。本地用户信号由中央处理集线器处理，并通过多个路径同时辐射到多个单独的转发平台。然后，信号被多个多个单独的转发平台中的每一个重新辐射到移动终端，该移动终端相干地并且相位地从多个多个单独的转发平台接收再发射的信号。用于发送每个用户信号的转发器和代码的数量可以容易地适应用户需求。此外，根据某些用户特征，每个用户被中央处理集线器分配利润值。分配的用户利润值允许最大化整个系统效用/盈利能力。

3. 发明授权

US06909875B1 Multi-platform wireless communication system for a variety of different user types 有权
标题翻译：多平台无线通信系统，适用于各种不同的用户类型
公开(公告)号：US06909875B1
公开(公告)日：2005-06-21
申请号：US09576648
申请日：2000-05-22
申请人： Kar W. Yung , Frank A. Hagen , Donald C. D. Chang
发明人： Kar W. Yung , Frank A. Hagen , Donald C. D. Chang
IPC分类号： H01Q3/26 , H04B7/185 , H04B7/212 , H04B7/26
CPC分类号： H04B7/18504 , H04B7/18506 , H04B7/18532 , H04B7/18534 , H04B7/212
摘要： A mobile wireless communications system including a plurality of individual transponding nodes of various types, all in communication with a central processing hub. A local user signal is processed by the central processing hub and radiated through multiple paths to a plurality of the plurality of individual transponding platforms simultaneously. The signal is then re-radiated by each of the plurality of the plurality of individual transponding platforms to a mobile terminal that receives the re-radiated signal from the plurality of the plurality of individual transponding platforms coherently and in phase. The number of transponders and codes used to transmit each user signal can be readily adapted to user requirements.
摘要翻译：一种移动无线通信系统，包括多个各种类型的单个转发节点，全部与中央处理集线器通信。本地用户信号由中央处理集线器处理，并通过多个路径同时辐射到多个单独的转发平台。然后，信号被多个多个单独的转发平台中的每一个重新辐射到移动终端，该移动终端相干地并且相位地从多个多个单独的转发平台接收再发射的信号。用于发送每个用户信号的转发器和代码的数量可以容易地适应用户需求。

4. 发明授权

US06785553B2 Position location of multiple transponding platforms and users using two-way ranging as a calibration reference for GPS 有权
标题翻译：使用双向测距作为GPS的校准参考的多个反应平台和用户的位置
公开(公告)号：US06785553B2
公开(公告)日：2004-08-31
申请号：US09841110
申请日：2001-04-24
申请人： Donald C. D. Chang , Kar W. Yung , David C. Cheng , Ming U. Chang , Frank A. Hagen
发明人： Donald C. D. Chang , Kar W. Yung , David C. Cheng , Ming U. Chang , Frank A. Hagen
IPC分类号： H04Q720
CPC分类号： G01S19/40 , G01S5/14 , G01S19/07 , G01S19/15 , H04B7/18504 , H04B7/18532 , H04B7/18534
摘要： A method and system for using two-way ranging navigation to accurately determine the location of a transponder platform above-Earth or a fixed or mobile target on the ground or on water. The two-way ranging navigation measurements are used as calibration references, thereby improving the positioning accuracy of GPS. The system includes GPS and a two-way ranging navigation system for taking position measurements of a target. A correction factor is determined as a function of the measurements and the GPS position is adjusted by the correction factor. The method for calibrating GPS using two-way ranging navigation involves taking a two-way ranging navigation measurement and a GPS measurement of a target, determining a correction factor as a function of the measurements, and correcting the GPS position by taking a second GPS measurement and adjusting it by the correction factor.
摘要翻译：一种使用双向测距导航准确地确定地球上的应答器平台或地面或水上固定或移动目标的位置的方法和系统。双向测距导航测量用作校准参考，从而提高GPS的定位精度。该系统包括GPS和用于对目标进行位置测量的双向测距导航系统。作为测量的函数确定校正因子，并且通过校正因子来调整GPS位置。使用双向测距导航来校准GPS的方法包括进行目标的双向测距导航测量和GPS测量，确定作为测量的函数的校正因子，以及通过进行第二GPS测量来校正GPS位置并通过校正因子进行调整。

5. 发明授权

US07089000B1 Multi-node wireless communication system with multiple transponding platforms 有权
标题翻译：具有多个反应平台的多节点无线通信系统
公开(公告)号：US07089000B1
公开(公告)日：2006-08-08
申请号：US09584012
申请日：2000-05-30
申请人： Ming U. Chang , Kar W. Yung , Frank A. Hagen , Donald C. D. Chang
发明人： Ming U. Chang , Kar W. Yung , Frank A. Hagen , Donald C. D. Chang
IPC分类号： H04Q7/20
CPC分类号： H04B7/18534
摘要： A mobile wireless communications system including a plurality of individual transponding platforms all in communication with a central processing hub. A signal processed by the central processing hub is radiated simultaneously through multiple paths to a plurality of the individual transponding platforms. The signal transmitted to each transponding platform by the hub is appropriately delayed by the hub so as to equalize the differential delay of all such signals from a given receiver location. The radiated signal is then re-radiated by each of the plurality of individual transponding platforms to a mobile satellite terminal that receives the re-radiated signal from the plurality of individual transponding platforms. The signals from the plurality of transponding platforms are all received coherently by the intended user, and incoherently by all other users.
摘要翻译：一种移动无线通信系统，包括与中央处理集线器通信的多个单独的转发平台。由中央处理集线器处理的信号同时通过多个路径被辐射到多个单独的转发平台。由集线器传输到每个转发平台的信号由集线器适当地延迟，以便均衡来自给定接收机位置的所有这些信号的差分延迟。然后，辐射信号被多个单独的转发平台中的每一个重新辐射到从多个单独的转发平台接收再发射信号的移动卫星终端。来自多个转发平台的信号都被预期用户相干接收，并且被所有其他用户不连贯地接收。

6. 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.

7. 发明授权

US06990314B1 Multi-node point-to-point satellite communication system employing multiple geo satellites 失效
标题翻译：采用多颗卫星的多节点点对点卫星通信系统
公开(公告)号：US06990314B1
公开(公告)日：2006-01-24
申请号：US09576652
申请日：2000-05-22
申请人： Frank A. Hagen , Richard Flammang , Kar W. Yung , Donald C. D. Chang
发明人： Frank A. Hagen , Richard Flammang , Kar W. Yung , Donald C. D. Chang
IPC分类号： H04B7/19
CPC分类号： H04B7/18534
摘要： A wireless communication system includes a satellite constellation consisting of a plurality of satellites. Each of the plurality of satellites is in an orbit whose eccentricity and inclination are perturbed relative to the same geosynchronous orbit. Each of the satellites in the constellation is capable of relaying signals in either direction between a central ground hub and a plurality of mobile user terminals. The plurality of satellites are configured such that the period of their geosynchronous orbit remains substantially constant at one sidereal day.
摘要翻译：无线通信系统包括由多个卫星组成的卫星星座。多个卫星中的每一个都在相对于相同的地球同步轨道扰动其偏心和倾斜的轨道中。星座中的每颗卫星能够在中央地面集线器和多个移动用户终端之间的任一方向上中继信号。多个卫星被配置为使得它们的地球同步轨道的周期在一个恒星天数保持基本恒定。

8. 发明授权

US06756937B1 Stratospheric platforms based mobile communications architecture 有权
标题翻译：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。

9. 发明授权

US08223733B2 Multi-platform wireless communication system for a variety of different user types 有权
标题翻译：多平台无线通信系统，适用于各种不同的用户类型
公开(公告)号：US08223733B2
公开(公告)日：2012-07-17
申请号：US11049499
申请日：2005-02-02
申请人： Kar W. Yung , Frank A. Hagen , Donald C. D. Chang
发明人： Kar W. Yung , Frank A. Hagen , Donald C. D. Chang
IPC分类号： H04B7/216
CPC分类号： H04B7/18504 , H04B7/18506 , H04B7/18532 , H04B7/18534 , H04B7/212
摘要： A mobile wireless communications system including a plurality of individual transponding nodes of various types, all in communication with a central processing hub. A local user signal is processed by the central processing hub and radiated through multiple paths to a plurality of the plurality of individual transponding platforms simultaneously. The signal is then re-radiated by each of the plurality of the plurality of individual transponding platforms to a mobile terminal that receives the re-radiated signal from the plurality of the plurality of individual transponding platforms coherently and in phase. The number of transponders and codes used to transmit each user signal can be readily adapted to user requirements.
摘要翻译：一种移动无线通信系统，包括多个各种类型的单个转发节点，全部与中央处理集线器通信。本地用户信号由中央处理集线器处理，并通过多个路径同时辐射到多个单独的转发平台。然后，信号被多个多个单独的转发平台中的每一个重新辐射到移动终端，该移动终端相干地并且相位地从多个多个单独的转发平台接收再发射的信号。用于发送每个用户信号的转发器和代码的数量可以容易地适应用户需求。

10. 发明授权

US06963548B1 Coherent synchronization of code division multiple access signals 失效
标题翻译：码分多址信号的相干同步
公开(公告)号：US06963548B1
公开(公告)日：2005-11-08
申请号：US09550505
申请日：2000-04-17
申请人： Donald C. D. Chang , Kar W. Yung , David C. Cheng , Frank A. Hagen , Ming U. Chang , John I. Novak, III
发明人： Donald C. D. Chang , Kar W. Yung , David C. Cheng , Frank A. Hagen , Ming U. Chang , John I. Novak, III
IPC分类号： H04B1/7097 , H04B7/185 , H04B7/26 , H04B1/707
CPC分类号： H04B7/18534 , H04B1/7097 , H04B2201/709709
摘要： A novel method and apparatus is described for reducing the number of CDMA codes for a constellation of multiple trasponder platforms serving a number of subscribers in the same service area. A coherent processing technique synchronizes the phase of CDMA signals arriving at a subscriber from multiple trasponder platforms to increase the code capacity and thus the number of possible subscribers for most of the multiple transponder platform systems in current use.
摘要翻译：描述了一种新颖的方法和装置，用于减少为同一服务区域中的多个订户服务的多个应答器平台的星座的CDMA码的数量。相干处理技术使来自多个应答器平台的到达用户的CDMA信号的相位同步，以增加当前使用中的多个应答器平台系统中的大多数应答器平台系统的代码容量和可能的订户数量。

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