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1. 发明授权

US06810249B1 Method and system of efficient spectrum utilization by communications satellites 有权
标题翻译：通信卫星频谱利用效率高的方法和系统
公开(公告)号：US06810249B1
公开(公告)日：2004-10-26
申请号：US09664940
申请日：2000-09-19
申请人： Thomas M. Walsh , George Hrycenko , William J. Nunan , Adam Stone
发明人： Thomas M. Walsh , George Hrycenko , William J. Nunan , Adam Stone
IPC分类号： H04Q720
CPC分类号： H04B7/19 , H04B7/2041
摘要： A satellite system includes a plurality of orbit slots having a first orbital and a second orbital slot. A first satellite occupies a first orbital slot and generates a first set of uniform beams. A second satellite located in a second orbital slot generates a second set of uniform beams. A tiling pattern on the face of the Earth has a plurality of cells, with each of the cells having a defined frequency for communication. The first set of beams and the second set of beams are generated according to parameters to avoid interference between them. The parameters may include satellite orbit separations, beam size, multiplicity of band reuse, and ground station received beamwidth.
摘要翻译：卫星系统包括具有第一轨道和第二轨道槽的多个轨道槽。第一颗卫星占据第一个轨道槽，并产生第一组均匀的射束。位于第二轨道槽中的第二卫星产生第二组均匀波束。地球表面上的平铺图案具有多个单元，每个单元具有定义的通信频率。根据参数生成第一组光束和第二组光束，以避免它们之间的干扰。这些参数可以包括卫星轨道分离，波束大小，频带重用的多重性和地面站接收的波束宽度。

2. 发明授权

US06313790B2 Method and system for determining a position of a transceiver in a communications network 有权
公开(公告)号：US06313790B2
公开(公告)日：2001-11-06
申请号：US09780103
申请日：2001-02-09
申请人： Donald C. D. Chang , Kar W. Yung , William J. Nunan , David C. Cheng , Bruce E. Shuman
发明人： Donald C. D. Chang , Kar W. Yung , William J. Nunan , David C. Cheng , Bruce E. Shuman
IPC分类号： H04B7185
CPC分类号： G01S5/14 , G01S5/12
摘要： A method and system for determining a position of an orbiting transceiver in a communications network includes at least a first and second transceiver at a first and second known location, respectively, on Earth. The first and second transceivers are adapted to transmit and receive communications signals to and from the orbiting transceiver. A processor coupled to one of the first and second transceivers determines a first and second range measurement between each of the first and second transceivers and the orbiting transceiver, respectively, as well as corresponding first and second range rates representative of a time rate of change of the first and second range measurements. The processor then determines a circle of intersection representative of the set of possible positions for the orbiting transceiver based on the first range measurement and the first range rate wherein the circle of intersection includes a specific orientation in space, a specific radius and a center in a specific, three-dimensional position relative to the known position of the first transceiver. An angular position of the orbiting transceiver is then determined along the circle of intersection based on the known position of the second transceiver and the second range measurement. Finally, the position of the orbiting transceiver is determined based on the circle of intersection and the angular position.

3. 发明授权

US07376417B2 Method and system of efficient spectrum utilization by communications satellites 有权
标题翻译：通信卫星频谱利用效率高的方法和系统
公开(公告)号：US07376417B2
公开(公告)日：2008-05-20
申请号：US10759766
申请日：2004-01-16
申请人： Thomas M. Walsh , George Hrycenko , William J. Nunan , Adam Stone
发明人： Thomas M. Walsh , George Hrycenko , William J. Nunan , Adam Stone
IPC分类号： H04Q7/20
CPC分类号： H04B7/19 , H04B7/2041
摘要： A satellite system includes a plurality of orbit slots having a first orbital and a second orbital slot. A first satellite occupies a first orbital slot and generates a first set of uniform beams. A second satellite located in a second orbital slot generates a second set of uniform beams. A tiling pattern on the face of the Earth has a plurality of cells, with each of the cells having a defined frequency for communication. The first set of beams and the second set of beams are generated according to parameters to avoid interference between them. The parameters may include satellite orbit separations, beam size, multiplicity of band reuse, and ground station received beamwidth.
摘要翻译：卫星系统包括具有第一轨道和第二轨道槽的多个轨道槽。第一颗卫星占据第一个轨道槽，并产生第一组均匀的射束。位于第二轨道槽中的第二卫星产生第二组均匀波束。地球表面上的平铺图案具有多个单元，每个单元具有定义的通信频率。根据参数生成第一组光束和第二组光束，以避免它们之间的干扰。这些参数可以包括卫星轨道分离，波束大小，频带重用的多重性和地面站接收的波束宽度。

4. 发明授权

US06229477B1 Method and system for determining a position of a communication satellite utilizing two-way ranging 有权
标题翻译：用于利用双向测距来确定通信卫星的位置的方法和系统
公开(公告)号：US06229477B1
公开(公告)日：2001-05-08
申请号：US09174182
申请日：1998-10-16
申请人： Donald C. D. Chang , Kar W. Yung , William J. Nunan , David C. Cheng , Bruce E. Shuman
发明人： Donald C. D. Chang , Kar W. Yung , William J. Nunan , David C. Cheng , Bruce E. Shuman
IPC分类号： H04B7185
CPC分类号： G01S5/14 , G01S5/12
摘要： A method and system for determining a position of an orbiting transceiver in a communications network includes at least a first and second transceiver at a first and second known location, respectively, on Earth. The first and second transceivers are adapted to transmit and receive communications signals to and from the orbiting transceiver. A processor coupled to one of the first and second transceivers determines a first and second range measurement between each of the first and second transceivers and the orbiting transceiver, respectively, as well as corresponding first and second range rates representative of a time rate of change of the first and second range measurements. The processor then determines a circle of intersection representative of the set of possible positions for the orbiting transceiver based on the first range measurement and the first range rate wherein the circle of intersection includes a specific orientation in space, a specific radius and a center in a specific, three-dimensional position relative to the known position of the first transceiver. An angular position of the orbiting transceiver is then determined along the circle of intersection based on the known position of the second transceiver and the second range measurement. Finally, the position of the orbiting transceiver is determined based on the circle of intersection and the angular position.
摘要翻译：用于确定通信网络中的轨道收发器的位置的方法和系统包括分别位于地球上的第一和第二已知位置处的至少第一和第二收发器。第一和第二收发器适于向和/或绕轨道收发信机发送和接收通信信号。耦合到第一和第二收发器中的一个的处理器分别确定第一和第二收发器和绕动收发器中的每一个之间的第一和第二范围测量，以及相应的第一和第二范围速率，其代表时间变化率第一和第二范围测量。然后，处理器基于第一范围测量和第一范围速率来确定代表轨道收发信机的一组可能位置的交集圈，其中交集圈包括空间中的特定取向，特定半径和相对于第一收发器的已知位置的特定的三维位置。然后，基于第二收发器的已知位置和第二范围测量，沿着交叉圆圈确定轨道收发器的角度位置。最后，轨道收发器的位置基于交点和角位置确定。

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