Apparatus and method for remote beam forming for satellite broadcasting systems
    62.
    发明授权
    Apparatus and method for remote beam forming for satellite broadcasting systems 有权
    用于卫星广播系统的远程波束形成的装置和方法

    公开(公告)号:US08098612B2

    公开(公告)日:2012-01-17

    申请号:US12122462

    申请日:2008-05-16

    CPC classification number: H04L27/265 H04B7/1851 H04B7/2041 H04N7/20 H04W16/14

    Abstract: A satellite broadcasting system is achieved in which remote beam forming processors located among distributed ground stations are used to control downlink beam footprints and pointing directions. Digital beam forming techniques allow a single satellite downlink broadcast antenna array to generate multiple simultaneous downlinks that can be pointed independently and that may contain distinct information content. By allocating some of the uplink back-channel elements as null channels, continuous calibration of the uplink channel can be performed, improving the performance of the downlink broadcast array and the quality of the broadcast for users. By wavefront multiplexing, all of the uplink channel elements propagate through the all of the available propagation channels simultaneously, eliminating the need for complex and costly individual array-element calibration equipment using on-board or ground-based references.

    Abstract translation: 实现了一种卫星广播系统,其中位于分布式地面站之间的远程波束形成处理器用于控制下行链路波束覆盖和指向方向。 数字波束形成技术允许单个卫星下行链路广播天线阵列产生可以独立指向并且可以包含不同信息内容的多个同时下行链路。 通过将一些上行链路后向信道元素分配为空信道,可以执行上行链路信道的连续校准,提高下行链路广播阵列的性能和用户的广播质量。 通过波前多路复用,所有上行链路信道元素同时传播通过所有可用的传播信道,消除了使用板载或基于地面的引用对复杂且昂贵的单独阵列元件校准设备的需求。

    Methods of reducing interference including determination of feeder link signal error and related systems
    63.
    发明授权
    Methods of reducing interference including determination of feeder link signal error and related systems 有权
    减少干扰的方法,包括确定馈线链路信号误差和相关系统

    公开(公告)号:US07890050B2

    公开(公告)日:2011-02-15

    申请号:US12400143

    申请日:2009-03-09

    CPC classification number: H04B7/18513 H04B7/1851

    Abstract: Methods of reducing interference in a satellite communications system may include receiving a plurality of feeder link signals and time aligning the plurality of feeder link signals to provide time aligned feeder link signals. At least two of the time aligned feeder link signals may be combined to provide reduced interference of at least one of the feeder link signals. Related systems are also discussed.

    Abstract translation: 减少卫星通信系统中的干扰的方法可以包括接收多个馈线链路信号并且对准多个馈线链路信号以提供时间对准的馈线链路信号。 至少两个时间对齐馈线链路信号可以被组合以提供至少一个馈线链路信号的减小的干扰。 还讨论了相关系统。

    Signal, interference and noise power measurement
    64.
    发明授权
    Signal, interference and noise power measurement 有权
    信号,干扰和噪声功率测量

    公开(公告)号:US07822154B2

    公开(公告)日:2010-10-26

    申请号:US10236414

    申请日:2002-09-06

    Abstract: Systems and methods are presented for measuring power levels of primary and interfering signals as well as noise, particularly for satellite transmitted signals. A typical method comprises the steps of receiving a signal comprising a primary signal, an interference signal and noise, demodulating the primary signal to remove a carrier frequency, decoding the primary signal to obtain symbols, estimating a power level of the primary signal based upon the demodulated and decoded primary signal. Additionally, an ideal primary signal can be generated from the carrier power and frequency and the symbols and subtracted from the received signal to produce the noise and interference signal. The noise and interference power is then estimated from the noise and interference signal.

    Abstract translation: 提出了系统和方法,用于测量主要和干扰信号的功率水平以及噪声,特别是卫星发射信号的噪声。 典型的方法包括以下步骤:接收包括主信号,干扰信号和噪声的信号,解调主信号以去除载波频率,解码主信号以获得符号,基于该信号估计主信号的功率电平 解调和解码的主信号。 此外,理想的主信号可以从载波功率和频率以及符号生成,并从接收信号中减去产生噪声和干扰信号。 然后从噪声和干扰信号估计噪声和干扰功率。

    SYSTEM AND METHOD FOR SATELLITE COMMUNICATION
    65.
    发明申请
    SYSTEM AND METHOD FOR SATELLITE COMMUNICATION 审中-公开
    卫星通信系统与方法

    公开(公告)号:US20100201566A1

    公开(公告)日:2010-08-12

    申请号:US12761839

    申请日:2010-04-16

    CPC classification number: H04B7/1851 H04B7/18513

    Abstract: A system and method are disclosed which may include providing at least one satellite having a plurality of beamformers configured to provide a plurality of respective beams having a plurality of different respective fixed pitch angles about an axis of the satellite; causing the at least one satellite to move around the earth along a non-geostationary orbit; establishing a data communication path between a first of the beamformers on the satellite and a communication target, the data communication path having a satellite end at the first beamformer and an target end at the communication target; shifting the satellite end of the data communication path through a succession of the beamformers as the satellite moves along its orbit; and at least substantially reducing an amount of RF wave energy directed to beamformers of the plurality of beamformers not forming part of the data communication path.

    Abstract translation: 公开了一种系统和方法,其可以包括提供具有多个波束形成器的至少一个卫星,所述多个波束形成器被配置成提供围绕卫星的轴线具有多个不同的相应固定桨距角的多个相应波束; 使至少一颗卫星沿着非对地静止轨道绕地球移动; 在卫星上的第一波束形成器和通信目标之间建立数据通信路径,数据通信路径在第一波束形成器处具有卫星端,在通信目标处具有目标端; 当卫星沿其轨道移动时,通过一系列波束形成器移动数据通信路径的卫星端; 并且至少基本上减少指向不形成数据通信路径的一部分的多个波束形成器的波束形成器的RF波能量。

    Methods of Reducing Interference Including Determination of Feeder Link Signal Error and Related Systems
    66.
    发明申请
    Methods of Reducing Interference Including Determination of Feeder Link Signal Error and Related Systems 有权
    减少干扰包括确定馈线链路信号误差和相关系统的方法

    公开(公告)号:US20090170427A1

    公开(公告)日:2009-07-02

    申请号:US12400143

    申请日:2009-03-09

    CPC classification number: H04B7/18513 H04B7/1851

    Abstract: Methods of reducing interference in a satellite communications system may include receiving a plurality of feeder link signals and time aligning the plurality of feeder link signals to provide time aligned feeder link signals. At least two of the time aligned feeder link signals may be combined to provide reduced interference of at least one of the feeder link signals. Related systems are also discussed.

    Abstract translation: 减少卫星通信系统中的干扰的方法可以包括接收多个馈线链路信号并且对准多个馈线链路信号以提供时间对准的馈线链路信号。 至少两个时间对齐馈线链路信号可以被组合以提供至少一个馈线链路信号的减小的干扰。 还讨论了相关系统。

    Satellite communication system using linear cell tracking
    68.
    发明授权
    Satellite communication system using linear cell tracking 有权
    卫星通信系统采用线性单元跟踪

    公开(公告)号:US07171158B2

    公开(公告)日:2007-01-30

    申请号:US10172260

    申请日:2002-06-14

    CPC classification number: H04B7/1851

    Abstract: An improved satellite communication device and system are provided. The satellite communication device uses yaw or roll-yaw steering to linearize angular track of uplink cells; one-dimensional linear “ratcheting” in an uplink antenna to maintain resource allocation of uplink cells along antenna columns; phased-array downlink antennas which can track earth-fixed downlink cells while compensating for the yaw (or roll-yaw) satellite steering; and variable rate TDMA service among downlink cells in a footprint. As a result, system overhead for performing new resource allocations between satellite handovers is minimized, thereby reducing resource management and increasing system capacity. Flexible bandwidth/capacity assignment of both uplink and downlink resources to earth locations via linear cell ratcheting, uplink RF peaking switch, and data-driven variable-TDMA downlink phased-arrays, is provided.

    Abstract translation: 提供了一种改进的卫星通信设备和系统。 卫星通信设备使用偏航或侧倾偏转导向线性化上行链路小区的角度轨迹; 上行链路天线中的一维线性“棘轮”,以沿着天线列维护上行链路小区的资源分配; 相位阵列下行链路天线,其可以在补偿偏航(或侧倾偏航)卫星转向的同时跟踪地球固定的下行链路小区; 以及在足迹中的下行链路小区之间的可变速率TDMA服务。 因此,在卫星切换之间执行新的资源分配的系统开销最小化,从而减少资源管理并增加系统容量。 提供了通过线性单元棘轮,上行链路峰值开关和数据驱动的可变TDMA下行链路相位阵列将上行链路和下行链路资源的灵活的带宽/容量分配给接地位置。

    Intra-and/or inter-system interference reducing systems and methods for satellite communications systems
    70.
    发明申请
    Intra-and/or inter-system interference reducing systems and methods for satellite communications systems 有权
    用于卫星通信系统的系统内和/或系统间干扰减少系统和方法

    公开(公告)号:US20050037749A1

    公开(公告)日:2005-02-17

    申请号:US10890758

    申请日:2004-07-14

    CPC classification number: H04B7/1851

    Abstract: A first radio signal is received via a first satellite reception path, for example, an antenna or spot beam, which serves a satellite cell. The received first radio signal includes a desired satellite uplink signal transmitted from a first source using a frequency assigned to the satellite cell and an interfering signal transmitted from at least one second source using the frequency assigned to the satellite cell. A second radio signal is received via a second satellite reception path, for example, via another antenna or spot beam of the system and/or via a satellite antenna beam of another system. The second radio signal includes a measure of the interfering signal. The first and second radio signals are processed to recover the desired satellite uplink signal.

    Abstract translation: 经由第一卫星接收路径接收第一无线电信号,例如用于卫星小区的天线或点波束。 所接收的第一无线电信号包括使用分配给卫星小区的频率从第一源发送的期望的卫星上行链路信号和使用分配给卫星小区的频率从至少一个第二源发送的干扰信号。 经由第二卫星接收路径例如经由系统的另一个天线或点波束和/或经由另一系统的卫星天线波束接收第二无线电信号。 第二无线电信号包括干扰信号的测量。 处理第一和第二无线电信号以恢复所需的卫星上行链路信号。

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