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    • 1. 发明授权
    • Demand assigned spatial multiplexing in satellite communication systems
    • 卫星通信系统中的需求分配空间复用
    • US06625129B1
    • 2003-09-23
    • US09410449
    • 1999-10-01
    • Keith A. OldsCarl Myron Wagner
    • Keith A. OldsCarl Myron Wagner
    • H04B7185
    • H04W4/00H04B7/18567H04B7/2041H04B7/2123H04W16/28H04W74/00H04W84/06
    • The methods (300, 900, and 1200), and apparatus (140 and 800) of the present invention employ demand assigned spatial multiplexing in a satellite communication system (100) to efficiently accommodate varying demand for high data rate service while minimizing satellite antenna and radio system complexity in a ubiquitous coverage satellite system optimized for transporting packet data. In a preferred embodiment, the methods (300, 900, 1000 and 1200) and apparatus (140 and 800) of the present invention use a first set of signaling beams (210) to establish signaling uplinks and then direct traffic spot beams (220) at particular UE devices to support traffic uplinks in accordance with demand assigned multiple access (DAMA) parameters when and only when the UE devices have traffic data to transmit to a satellite. In a preferred embodiment, UE device (140) also executes a method (1200) that includes steps for determining appropriate steering angles for a servicing satellite (110) to use to direct a traffic spot beam (220) to the UE device's location when the UE has traffic data to transmit.
    • 本发明的方法(300,900和1200)和装置(140和800)在卫星通信系统(100)中使用需要分配的空间多路复用,以有效地适应对高数据速率业务的不同需求,同时最小化卫星天线和 无线电系统复杂度在无处不在的覆盖卫星系统中优化传输数据包数据。 在优选实施例中,本发明的方法(300,900,1000和1200)和装置(140和800)使用第一组信令波束(210)来建立信令上行链路,然后直接交通点波束(220) 在特定的UE设备上,当UE设备具有传输到卫星的业务数据时,根据需要分配多个接入(DAMA)参数来支持业务上行链路。 在优选实施例中,UE设备(140)还执行方法(1200),该方法包括以下步骤:确定用于将服务点波束(220)引导到UE设备的位置的服务卫星(110)的适当转向角, UE具有传输的业务数据。
    • 3. 发明授权
    • Hybrid geostationary and low earth orbit satellite ground station antenna
    • 混合对地静止和低地球轨道卫星地面站天线
    • US06175340B1
    • 2001-01-16
    • US09071043
    • 1998-05-04
    • Keith Andrew OldsCarl Myron WagnerJohn Wesley Locke
    • Keith Andrew OldsCarl Myron WagnerJohn Wesley Locke
    • H01Q2100
    • H01Q21/28H01Q3/08H01Q3/26H01Q21/061
    • A hybrid geostationary and low earth orbit (LEO) ground station antenna provides a geostationary receive antenna (30) which generates a narrow receive antenna beam for use with geostationary satellites. The ground station antenna can be either manually positioned so that the normal boresight of the antenna is directed toward the geostationary satellite serving the subscriber, or may be positioned using a cradle (170) which provides motion in the pitch, roll, and yaw axes. The ground station antenna also includes a LEO receive antenna (40) and a LEO transmit antenna (50) which receive which communicate with LEO satellites by way of wider beam, lower gain antenna beams. The geostationary receive antenna (30) is used in conjunction with the LEO satellites and during operations which involve communication with both types of satellites.
    • 混合对地静止轨道和低地球轨道(LEO)地面站天线提供了一个对地静止接收天线(30),其产生与地球静止卫星一起使用的窄接收天线波束。 地面站天线可以手动定位,使得天线的正常视轴指向服务于用户的对地静止卫星,或者可以使用在俯仰,俯仰和偏航轴中提供运动的支架(170)来定位。 地面站天线还包括LEO接收天线(40)和LEO发射天线(50),LEO发射天线(50)通过更宽的波束,较低增益天线波束接收与LEO卫星的通信。 地球静止接收天线(30)与LEO卫星结合使用,并且涉及与两种类型的卫星通信的操作期间。