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    • 1. 发明授权
    • Satellite telecommunication system with apparatus for protecting radio
astronomy and method of using same
    • 具有用于保护射电天文学的卫星电信系统及其使用方法
    • US5548800A
    • 1996-08-20
    • US254012
    • 1994-06-03
    • Keith A. OldsChristopher N. Kurby
    • Keith A. OldsChristopher N. Kurby
    • G01S19/11H04B7/185
    • H04B7/18513
    • A constellation of satellites distributed around the earth serves as a communication network that supports global communication of subscriber units. Subscriber units may potentially transmit from any location on earth. Some locations such as radio astronomy sites may be interfered with by nearby transmissions from subscriber units. Subscriber units located within a potentially interfering proximity to radio astronomy sites are prohibited from transmitting potentially interfering signals by reception of a non-interfering beacon at radio astronomy sites. The beacon repeatedly transmits a synchronous control signal with a subscriber unit's servicing satellite's control signal. The beacon's control signal is compatible with a subscriber unit's communication receiver. Control signal information contained in a beacon control signal inhibits the subscriber unit from transmitting.
    • 分布在地球上的卫星星座作为支持用户单元全球通信的通信网络。 用户单元可能可能从地球上的任何位置传输。 诸如射电天文遗址的某些位置可能受到来自用户单元的附近传输的干扰。 位于与射电天文台站潜在干扰接近的订户单元被禁止通过在射电天文站点接收非干扰信标来发送潜在的干扰信号。 信标反复发送具有用户单元的维修卫星的控制信号的同步控制信号。 信标的控制信号与用户单元的通信接收机兼容。 包含在信标控制信号中的控制信号信号禁止用户单元的发送。
    • 7. 发明授权
    • Satellite adaptive antenna system
    • 卫星自适应天线系统
    • US06476776B1
    • 2002-11-05
    • US09712767
    • 2000-11-14
    • Christopher N. Kurby
    • Christopher N. Kurby
    • H01Q124
    • H01Q21/29H01Q1/244H01Q3/26H01Q21/245
    • A satellite adapted antenna system has at least spaced apart first and second elements (104, 106), the first and second elements (104, 106) having substantially a common first polarization. A third element (108) has a second polarization that is opposite the first polarization of the first element (104). An antenna mode selector system selects between operatively connecting the first and second elements (104, 106) to form a specular antenna and operatively connecting the first and third elements (104, 108) to form a diversity antenna. Each of the first, second and third elements (104, 106, 108) are quadrifilar helix antennas. The first and second elements (104, 106) are quadrifilar helix antenna having right hand circuit polarization, and the third element (108) is a quadrifilar helix antenna having a left hand circuit polarization. The method for adapting a satellite antenna system has the steps of providing a diversity antenna having a polarization diversity mode defined by the first and third elements (104, 108); providing a specular antenna having a pattern gain mode defined by the first and second elements (104, 106); using the diversity mode for communicating with a satellite; and switching to the specular mode for communicating with the satellite in response to at least one predetermined characteristic.
    • 卫星适配天线系统具有至少间隔开的第一和第二元件(104,106),所述第一和第二元件(104,106)具有基本上共同的第一偏振。 第三元件(108)具有与第一元件(104)的第一极化相反的第二极化。 天线模式选择器系统在可操作地连接第一和第二元件(104,106)之间选择以形成镜面天线并且可操作地连接第一和第三元件(104,108)以形成分集天线。 第一,第二和第三元件(104,106,108)中的每一个都是四极螺旋天线。 第一和第二元件(104,106)是具有右手电路极化的四极螺旋天线,并且第三元件(108)是具有左手电路极化的四极螺旋天线。 适应卫星天线系统的方法具有以下步骤:提供具有由第一和第三元件(104,108)定义的极化分集模式的分集天线; 提供具有由第一和第二元件(104,106)定义的图案增益模式的镜面天线; 使用分集模式与卫星通信; 以及响应于至少一个预定特性切换到用于与卫星进行通信的镜面模式。
    • 8. 发明授权
    • Geographic-area selective low-earth satellite-based paging broadcast
system and method
    • 地理区域选择性低地球卫星寻呼广播系统及方法
    • US5396643A
    • 1995-03-07
    • US933550
    • 1992-08-24
    • Michael W. FrenzerRobert J. LocascioJoan E. ZocherDwight D. WalthersMartin V. SeitzChristopher N. Kurby
    • Michael W. FrenzerRobert J. LocascioJoan E. ZocherDwight D. WalthersMartin V. SeitzChristopher N. Kurby
    • H04Q7/38H04B7/185H04B7/195
    • H04B7/18567
    • The present invention includes a low-earth satellite-based paging broadcast system (100) and method (200, 300) that maximizes spectral efficiency and minimizes power expenditure for the broadcast of paging messages by broadcasting the messages to terminator- or originator-selectable portions of the total system coverage area. The terminator selects a long-term preferred geographic area (LTPGA), and optionally, a short-term preferred geographic area (STPGA). The originator provides the terminator ID, the message, and optionally provides a customized preferred geographic area (CPGA). Terminators and originators can easily modify the selectable geographic areas (SGA(s)): LTPGA(s), STPGA(s), and CPGA(s). The gateway converts the SGA(s) to addressable coverage areas (ACA(s)), and transmits a signal including the paging information, and ACA(s) to at least a first communication satellite (COM SAT). The COM SAT(s) provide for crosslinking the signal to other COM SAT(s) and for broadcasting the paging information to the ACA(s).
    • 本发明包括一种低地球卫星寻呼广播系统(100)和方法(200,300),其通过将消息广播到终端器或发起者可选择部分来最大化频谱效率并最小化用于广播寻呼消息的功率消耗 的系统覆盖面积。 终端选择长期优选地理区域(LTPGA),以及可选的短期优选地理区域(STPGA)。 发起者提供终结者ID,消息,并且可选地提供定制的优选地理区域(CPGA)。 终结者和发起者可以轻松地修改可选地理区域(SGA):LTPGA(s),STPGA和CPGA(s)。 网关将SGA转换为可寻址覆盖区域(ACA),并将包括寻呼信息和ACA的信号发送到至少第一通信卫星(COM SAT)。 COM SAT提供将信号交叉到其他COM SAT并将寻呼信息广播到ACA。