Space-based network architectures for satellite radiotelephone systems

    公开(公告)号:US07006789B2

    公开(公告)日:2006-02-28

    申请号:US10225623

    申请日:2002-08-22

    IPC分类号: H04B7/185

    摘要: A space-based network for a satellite radiotelephone system includes at least one receive-only satellite and at least one transmit satellite. The transmit satellite can be a transmit-only satellite or a transmit and receive satellite. The receive-only satellite(s) are configured to receive wireless communications from a radiotelephone at a location over a satellite frequency band. The transmit satellite(s) are configured to transmit wireless communications to the radiotelephone at the location over the satellite frequency band. By providing at least one receive-only satellite and at least one transmit satellite, space-based networks can offer a significant link margin, without the need to undesirably burden the radiotelephones themselves to achieve this link margin.

    SYSTEMS AND METHODS FOR HANDOVER BETWEEN SPACE BASED AND TERRESTRIAL RADIOTERMINAL COMMUNICATIONS, AND FOR MONITORING TERRESTRIALLY REUSED SATELLITE FREQUENCIES AT A RADIOTERMINAL TO REDUCE POTENTIAL INTERFERENCE
    83.
    发明授权
    SYSTEMS AND METHODS FOR HANDOVER BETWEEN SPACE BASED AND TERRESTRIAL RADIOTERMINAL COMMUNICATIONS, AND FOR MONITORING TERRESTRIALLY REUSED SATELLITE FREQUENCIES AT A RADIOTERMINAL TO REDUCE POTENTIAL INTERFERENCE 有权
    用于基于空间和地面辐射通信之间的切换的系统和方法,以及用于监测雷达卫星频率的雷达卫星降低潜在干扰的系统和方法

    公开(公告)号:US06879829B2

    公开(公告)日:2005-04-12

    申请号:US10828378

    申请日:2004-04-20

    摘要: A satellite communications system includes a satellite that is configured to wirelessly communicate with radioterminals in a satellite coverage area over a satellite frequency band, and an ancillary terrestrial component that is configured to wirelessly communicate with radioterminals in the satellite coverage area over at least some of the satellite frequency band, to thereby terrestrially reuse at least some of the satellite frequency band. Wireless communications with a radioterminal are handed over from the ancillary terrestrial component to the satellite if the radioterminal transmit power exceeds a threshold, and a received satellite signal quality exceeds a threshold, even though the radioterminal is able to wirelessly communicate with the ancillary terrestrial component. Downlink wireless radiation that is received at the radioterminal from a satellite may be monitored to determine potential interference created by the uplink radiation of the radioterminal due to the terrestrial reuse of at least some of the satellite frequency band.

    摘要翻译: 一种卫星通信系统包括配置成通过卫星频带与卫星覆盖区域中的无线电终端进行无线通信的卫星,以及被配置为与卫星覆盖区域中的至少一些无线电通信无线通信的辅助地面组件 卫星频带,从而陆上重用至少一些卫星频带。 如果无线电终端发射功率超过阈值,并且接收的卫星信号质量超过阈值,即使无线电终端能够与辅助地面组件进行无线通信,则具有无线电终端的无线通信从辅助地面组件切换到卫星。 可以监测从卫星的无线电终端接收的下行链路无线辐射,以确定由于卫星频带的至少一部分的陆地再利用而由无线电终端的上行辐射产生的潜在干扰。

    Wireless communications systems and methods using satellite-linked remote terminal interface subsystems
    86.
    发明授权
    Wireless communications systems and methods using satellite-linked remote terminal interface subsystems 有权
    使用卫星链接的远程终端接口子系统的无线通信系统和方法

    公开(公告)号:US06856787B2

    公开(公告)日:2005-02-15

    申请号:US10151567

    申请日:2002-05-20

    IPC分类号: H04B7/185

    CPC分类号: H04B7/18563

    摘要: A satellite gateway is coupled to a communications network and is operative to communicate with a communications satellite. A terrestrial terminal interface subsystem is operative to communicate with the satellite gateway via the communications satellite using a first radio interface and to communicate with terminals over a geographic area using a second radio interface. The communications network may be a wireless communications network, and the satellite gateway is configured to communicate with a base station controller of the wireless communications network, such that the terrestrial terminal interface subsystem may provide one or more satellite-linked terrestrial base stations.

    摘要翻译: 卫星网关耦合到通信网络并且可操作以与通信卫星通信。 陆地终端接口子系统可操作以使用第一无线电接口通过通信卫星与卫星网关进行通信,并使用第二无线电接口与地理区域上的终端进行通信。 通信网络可以是无线通信网络,并且卫星网关被配置为与无线通信网络的基站控制器通信,使得地面终端接口子系统可以提供一个或多个卫星连接的地面基站。

    Filters for combined radiotelephone/GPS terminals
    87.
    发明授权
    Filters for combined radiotelephone/GPS terminals 有权
    组合无线电话/ GPS终端的滤波器

    公开(公告)号:US06785543B2

    公开(公告)日:2004-08-31

    申请号:US10353548

    申请日:2003-01-29

    IPC分类号: H04Q720

    摘要: A satellite radiotelephone system includes a space-based component, a plurality of ancillary terrestrial components, and a plurality of radiotelephones. The space-based component is configured to provide wireless radiotelephone communications using satellite radiotelephone frequencies. The plurality of ancillary terrestrial components include a plurality of ancillary terrestrial component antennas configured to provide wireless radiotelephone communications using at least one of the satellite radiotelephone frequencies in a radiation pattern that increases radiation below the horizon compared to above the horizon. The plurality of radiotelephones are configured to communicate with the space-based component and with the plurality of ancillary terrestrial components. Each radiotelephone also includes a GPS signal processor and a GPS mode filter that is configured to suppress energy at (1575.42−&Dgr;) MHz, where 0

    摘要翻译: 卫星无线电话系统包括基于空间的组件,多个辅助地面组件和多个无线电话机。 基于空间的组件被配置为使用卫星无线电话频率来提供无线电话通信。 多个辅助地面组件包括多个辅助地面分量天线,其被配置为使用辐射模式中的至少一个卫星无线电话频率提供无线无线电话通信,所述辐射模式在地平线之上增加与地平线以上的辐射。 多个无线电话机被配置为与基于空间的部件和多个辅助地面部件通信。 每个无线电话机还包括GPS信号处理器和被配置为在(1575.42-Δ)MHz)处抑制能量的GPS模式滤波器,其中0

    Method and apparatus for distinguishing between minimum and non-minimum
phase fades
    88.
    发明授权
    Method and apparatus for distinguishing between minimum and non-minimum phase fades 失效
    用于区分最小和非最小相位衰落的方法和装置

    公开(公告)号:US4403351A

    公开(公告)日:1983-09-06

    申请号:US328121

    申请日:1981-12-07

    IPC分类号: H04B7/015 H04B1/10

    CPC分类号: H04B7/015

    摘要: The fade character of a received double-sideband, phase coherent signal is determined from the location of the fade notch frequency, (.omega..sub.F) relative to the center (.omega..sub.c) of the received signal frequency spectrum and the phase between fundamental components of first (P.sub.1) and second (P.sub.2) product signals. These product signals are derived (401, 403, 411, 413, 419, 420, 421 or 801, 802, 803, 805, 811) using first (.omega..sub.1) and second (.omega..sub.2) spectral components that are symmetrically disposed about the center of the received signal frequency spectrum. The fundamental components of each product signal are at a common frequency.

    摘要翻译: 接收的双边带相位相位信号的衰落特性是根据接收信号频谱的相对于接收信号频谱的中心(ωc)的衰落陷波频率(ω-F)的位置和第一 (P1)和第二(P2)产品信号。 这些产品信号使用第一(ω1)和第二(ω2)频谱分量导出(401,403,411,413,419,420,421或801,802,803,805,811),其被对称地设置在 中心的接收信号频谱。 每个产品信号的基本组成部分处于共同的频率。

    Adaptive beam forming with multi-user detection and interference reduction in satellite communication systems and methods
    89.
    发明授权
    Adaptive beam forming with multi-user detection and interference reduction in satellite communication systems and methods 有权
    自适应波束形成与卫星通信系统和方法中的多用户检测和干扰减少

    公开(公告)号:US08744360B2

    公开(公告)日:2014-06-03

    申请号:US12689590

    申请日:2010-01-19

    IPC分类号: H04B1/00 H04B15/00

    CPC分类号: H04B7/18563 H04B7/18513

    摘要: Satellite communications methods include receiving communications signals including co-channel interference at a space-based component from a plurality of wireless terminals in a satellite footprint over a satellite frequency band and reducing interference in the communication signals by (a) performing co-channel interference reduction on the communications signals to generate a plurality of interference reduced signals and (b) performing multiple access interference cancellation on the interference reduced signals. An interference reducing detector for a satellite communications system includes an interference reducer configured to perform co-channel interference reduction on communications signals to generate a plurality of interference reduced signals, and a detector configured to perform multiple access interference cancellation on the interference reduced signals. Satellite communications systems and satellite gateways including interference reducing detectors are also disclosed.

    摘要翻译: 卫星通信方法包括从卫星频带上的卫星覆盖区中的多个无线终端在基于空间的组件接收通信信号,并减少通信信号中的干扰(a)执行同信道干扰减少 在通信信号上产生多个干扰减少信号,以及(b)对干扰减小的信号执行多址干扰消除。 用于卫星通信系统的干扰减少检测器包括:干扰减少器,被配置为对通信信号执行同信道干扰减少以产生多个干扰减小信号;以及检测器,被配置为对干扰减小的信号执行多址干扰消除。 还公开了包括减少干扰检测器的卫星通信系统和卫星网关。

    Systems and/or methods of data acquisition from a transceiver
    90.
    发明授权
    Systems and/or methods of data acquisition from a transceiver 有权
    从收发器获取数据的系统和/或方法

    公开(公告)号:US08665068B2

    公开(公告)日:2014-03-04

    申请号:US12620122

    申请日:2009-11-17

    IPC分类号: H04Q5/22 G08G1/01 H04J11/00

    摘要: Systems and/or Methods are disclosed for acquiring data from a transceiver responsive to one or more signals that are received at the transceiver from one or more devices. In one embodiment, a transceiver is configured to transmit a signal responsive to having received a first signal from a first device, wherein the signal that is transmitted by the transceiver is configured to trigger a second device to transmit a second signal. The transceiver is further configured to transmit data responsive to having received the second signal that is transmitted by the second device. In other embodiments, a transceiver is configured to receive a signal from a first device over frequencies of a predetermined frequency band that the first device is authorized to use, to receive a signal from a second device over frequencies of the predetermined frequency band and to transmit data responsive to having received both the signal from the first device and the signal from the second device. The transceiver is further configured to require that both the signal from the first device and the signal from the second device be received at the transceiver before the data is transmitted. Analogous methods are also disclosed.

    摘要翻译: 公开了系统和/或方法,用于响应于在一个或多个设备处在收发器处接收到的一个或多个信号来从收发机采集数据。 在一个实施例中,收发器被配置为响应于已经从第一设备接收到第一信号来发送信号,其中由收发器发送的信号被配置为触发第二设备发送第二信号。 收发器还被配置为响应于已经接收到由第二设备发送的第二信号而发送数据。 在其他实施例中,收发器被配置为通过第一设备被授权使用的预定频带的频率从第一设备接收信号,以在预定频带的频率上接收来自第二设备的信号,并且发送 响应于已经接收到来自第一设备的信号和来自第二设备的信号的数据。 收发器还被配置为要求在数据被发送之前来自第一设备的信号和来自第二设备的信号都在收发器处被接收。 还公开了类似的方法。