中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

17 records (took 0.017 seconds)

    GROUND STATION ANTENNA ARRAY FOR AIR TO GROUND COMMUNICATION SYSTEM
    3.
    发明申请
    GROUND STATION ANTENNA ARRAY FOR AIR TO GROUND COMMUNICATION SYSTEM 审中-公开
    地面站天线阵列，用于空中接地通信系统

    公开(公告)号：US20120200458A1

    公开(公告)日：2012-08-09

    申请号：US13168623

    申请日：2011-06-24

    Applicant: Ahmad Jalali ,  Mohammad A. Tassoudji ,  Ernest T. Ozaki ,  William G. Ames ,  Leonard N. Schiff

    Inventor： Ahmad Jalali ,  Mohammad A. Tassoudji ,  Ernest T. Ozaki ,  William G. Ames ,  Leonard N. Schiff

    IPC: H01Q3/00

    CPC classification number: H04W52/241 ,  H01Q1/2291 ,  H01Q1/246 ,  H01Q1/28 ,  H01Q3/24 ,  H01Q3/26 ,  H01Q13/02 ,  H01Q21/062 ,  H01Q21/205 ,  H01Q25/00 ,  H04B7/18506 ,  H04W84/005

    Abstract: A ground station antenna array includes a first array of antenna elements. A second array of antenna elements are vertically aligned with the first array of antenna elements. The first array of antenna elements and the second array of antenna elements are coupled to the digital beam forming circuitry and each cover a same sector of azimuth; the first array of antenna elements only covering a first elevation; the second array of antenna elements only covering a second lower elevation. The digital beam forming circuitry directs a radiation pattern of the first array of antenna elements in a first range of elevation angles, and directs a radiation pattern of the second array of antenna elements in a second range of elevation angles. The second array of antenna elements has higher gain than the first array. A respective transceiver is coupled to respective antenna elements of the first and second arrays.

    Abstract translation: 地面站天线阵列包括天线元件的第一阵列。 天线元件的第二阵列与天线元件的第一阵列垂直对准。 天线元件的第一阵列和第二天线元件阵列耦合到数字波束形成电路，并且每个覆盖相同的方位角; 天线元件的第一阵列仅覆盖第一高度; 天线元件的第二阵列仅覆盖第二较低高度。 数字波束形成电路在第一仰角范围内引导天线元件的第一阵列的辐射图案，并且在第二仰角范围内引导天线元件的第二阵列的辐射图。 天线元件的第二阵列具有比第一阵列更高的增益。 相应的收发器耦合到第一和第二阵列的相应天线元件。

    System and method for reducing call dropping rates in a multi-beam communication system
    4.
    发明授权
    System and method for reducing call dropping rates in a multi-beam communication system 失效
    用于降低多光束通信系统中的呼叫丢弃率的系统和方法

    公开(公告)号：US06208858B1

    公开(公告)日：2001-03-27

    申请号：US09120857

    申请日：1998-07-21

    Applicant: Franklin P. Antonio ,  Gene W. Marsh ,  Richard A. Stewart ,  Marie M. Bjerede ,  Ananthanarayanan Chockalingam ,  Arthur S. Kerns ,  Brian Butler ,  Matthew S. Grob ,  James T. Determan ,  Douglas Grover ,  Leonard N. Schiff ,  William G. Ames

    Inventor： Franklin P. Antonio ,  Gene W. Marsh ,  Richard A. Stewart ,  Marie M. Bjerede ,  Ananthanarayanan Chockalingam ,  Arthur S. Kerns ,  Brian Butler ,  Matthew S. Grob ,  James T. Determan ,  Douglas Grover ,  Leonard N. Schiff ,  William G. Ames

    IPC: H04Q720

    CPC classification number: H04B7/18534

    Abstract: A method for reducing call dropping rates in a multi-beam communication system. The multi-beam communication system includes a user terminal, a gateway, and a plurality of beam sources, where each beam source projects a plurality of beams, and where a communication link between the user terminal and the gateway is established on one or more beams. The method according to the present invention relies on a messaging protocol between the gateway and the user terminal. Based on messages sent from the user terminal to the gateway, preferably on a preselected periodic basis, the gateway can determine the more desirable beam(s) for transmitting data or information to the user terminal. The messages sent from the user terminal to the gateway contain values representing beam strengths as measured at the user terminal. The gateway uses the user terminal measured beam strengths to select the beams that should be used for transmitting data or information to the user terminal. The beams that should be used are the beams that if used will decrease the call dropping rates and provide a desired level of beam source diversity.

    Abstract translation: 一种用于在多光束通信系统中降低呼叫丢弃率的方法。 多波束通信系统包括用户终端，网关和多个波束源，其中每个波束源投射多个波束，并且在一个或多个波束上建立用户终端和网关之间的通信链路 。 根据本发明的方法依赖于网关与用户终端之间的消息协议。 基于从用户终端发送到网关的消息，优选地以预选的周期性基础，网关可以确定用于向用户终端发送数据或信息的更理想的波束。 从用户终端发送到网关的消息包含表示在用户终端测量的波束强度的值。 网关使用用户终端测量的光束强度来选择应用于向用户终端发送数据或信息的光束。 应该使用的波束是如果使用的波束将降低呼叫丢弃率并提供期望的波束源分集水平。

    Synchronization of satellite and terrestrial broadcast ODFM signals
    5.
    发明授权
    Synchronization of satellite and terrestrial broadcast ODFM signals 有权
    卫星和地面广播ODFM信号的同步

    公开(公告)号：US08284826B2

    公开(公告)日：2012-10-09

    申请号：US11934684

    申请日：2007-11-02

    Applicant: Leonard N. Schiff ,  William G. Ames

    Inventor： Leonard N. Schiff ,  William G. Ames

    IPC: H04B3/46

    CPC classification number: H04H20/18 ,  H04H20/67

    Abstract: Synchronization of satellite and terrestrial broadcasts in a shared frequency arrangement is use in order to facilitate simultaneous reception of the broadcasts. A delay value is adjusted based on a synchronization between a first terrestrial broadcast and a satellite broadcast, and a delay value for a second terrestrial broadcast is adjusted based on a synchronization between the second terrestrial broadcast, the first terrestrial broadcast and the satellite broadcast. The adjustment of the relative delay values provides an improved reception pattern based on receipt of a shared frequency communication from multiple sources by improving a signal quality factor within at least selected regions of the coverage areas in which the relative delay values permit synchronization. This allows for synchronization lock between multiple substantially simultaneous broadcasts as determined by a cyclic prefix window of the broadcasts in overlapping coverage areas, useful for simultaneous satellite and terrestrial broadcasts using an OFDM format.

    Abstract translation: 使用共享频率安排中的卫星和地面广播的同步，以便于同时接收广播。 基于第一地面广播和卫星广播之间的同步来调整延迟值，并且基于第二地面广播，第一地面广播和卫星广播之间的同步来调整用于第二地面广播的延迟值。 相对延迟值的调整通过改善相对延迟值允许同步的覆盖区域的至少所选区域内的信号质量因子，基于从多个源接收到共享频率通信来提供改进的接收模式。 这允许在重叠覆盖区域中的广播的循环前缀窗口确定的多个基本上同时的广播之间的同步锁定，对于使用OFDM格式的同时卫星和地面广播是有用的。

    Dual satellite navigation system and method
    6.
    发明授权
    Dual satellite navigation system and method 失效
    双卫星导航系统及方法

    公开(公告)号：US5126748A

    公开(公告)日：1992-06-30

    申请号：US702900

    申请日：1991-05-20

    Applicant: William G. Ames ,  Irwin M. Jacobs ,  Lindsay A. Weaver, Jr. ,  Klein S. Gilhousen

    Inventor： William G. Ames ,  Irwin M. Jacobs ,  Lindsay A. Weaver, Jr. ,  Klein S. Gilhousen

    IPC: G01S5/00 ,  G01S5/12 ,  G01S13/87

    CPC classification number: G01S13/876 ,  G01S13/46 ,  G01S5/0009 ,  G01S5/12 ,  G01S2013/466

    Abstract: A system and method for determining the position of an airborne object, using a fixed station and a pair of earth orbit satellites whose positions are known. Separate periodic signals are transmitted from the fixed station via the first and second satellites to the object whose position is to be determined. The phase offset in periodic characteristics of the periodic signals as received from the first and second satellites is measured at the object. The phase offset corresponds to a realtive time difference in propagation of the signals traveling two different paths to the object. The object transmits via the first satellite a return signal indicative of the measured relative time difference. This return signal is activated some time in the future according to the object local time, which is slaved to receipt of the periodic signal sent through the first satellite. This future time is the start of the particular time period as decided by the fixed station's schedule. At the fixed station, an instantaneous round trip delay, determined by the time offset of the current transmission clock time relative to the receive clock time of reception of the return signal, along with the measured relative time difference sent back on the return signal, is used to calculate the distances between the first and second satellites to the object. From these distances, along with the combined altitude of the object with the distance from the surface of the earth to the center of the earth, the position of the object is calculated.

    Abstract translation: 一种用于确定机载物体的位置的系统和方法，其使用已知位置的固定站和一对地球轨道卫星。 分离的周期信号从固定站经由第一和第二卫星发送到要确定其位置的对象。 在物体处测量从第一和第二卫星接收的周期性信号的周期特性中的相位偏移。 相位偏移对应于将两个不同路径传播到物体的信号传播的实时时差。 物体经由第一卫星发送指示所测量的相对时间差的返回信号。 该返回信号在将来根据对象本地时间被激活一段时间，该对象本地时间被接收通过第一卫星发送的周期信号。 这个未来时间是由固定电台的时间表决定的特定时间段的开始。 在固定站，由当前传输时钟时间相对于接收返回信号的接收时钟时间的时间偏移确定的瞬时往返延迟以及在返回信号上发回的测量的相对时间差是 用于计算第一和第二卫星与物体之间的距离。 从这些距离，以及与地球表面到地球中心距离的物体的组合高度，计算物体的位置。

    OVERLAYING AN AIR TO GROUND COMMUNICATION SYSTEM ON SPECTRUM ASSIGNED TO SATELLITE SYSTEMS
    8.
    发明申请
    OVERLAYING AN AIR TO GROUND COMMUNICATION SYSTEM ON SPECTRUM ASSIGNED TO SATELLITE SYSTEMS 有权
    在分配给卫星系统的频谱上覆盖接地通信系统的空气

    公开(公告)号：US20130044611A1

    公开(公告)日：2013-02-21

    申请号：US13210628

    申请日：2011-08-16

    Applicant: Ahmad Jalali ,  Leonard N. Schiff ,  William G. Ames

    Inventor： Ahmad Jalali ,  Leonard N. Schiff ,  William G. Ames

    IPC: H04B7/185 ,  H04W24/00

    CPC classification number: H04B7/18508 ,  H04B7/18502 ,  H04W16/14 ,  H04W36/20 ,  H04W36/30

    Abstract: An air to ground communication system provides internet access to aircraft from ground based stations. The air to ground system shares spectrum with uplink portions of a satellite communication spectrum. Interference mitigation techniques are employed to avoid interference between the ground based communications and satellite communications. Fade mitigation techniques are employed to provide communication to aircraft at low angles of elevation in the presence of rain.

    Abstract translation: 空对地通信系统提供从地面站到飞机的互联网接入。 空对地系统与卫星通信频谱的上行链路部分共享频谱。 采用干扰减轻技术来避免基于地面的通信和卫星通信之间的干扰。 采用褪色减轻技术来在雨下的情况下以低仰角向飞机提供通信。

    Mixed reuse of feeder link and user link bandwidth
    10.
    发明授权
    Mixed reuse of feeder link and user link bandwidth 有权
    馈线链路和用户链路带宽的混合重用

    公开(公告)号：US07525934B2

    公开(公告)日：2009-04-28

    申请号：US10940356

    申请日：2004-09-13

    Applicant: William G. Ames ,  Leonard Norman Schiff

    Inventor： William G. Ames ,  Leonard Norman Schiff

    IPC: H04B7/204

    CPC classification number: H04B7/18515

    Abstract: An apparatus and method for a wireless communication system in which a forward/uplink portion and a return/uplink portion are assigned within an available frequency bandwidth is disclosed. More particularly, a service area is divided into multiple regions. The assignment of the forward/uplink portion of the return/uplink portion is shuffled in the multiple regions. The apparatus and method may be implemented in a multi-beam wireless communication system.

    Abstract translation: 公开了一种用于无线通信系统的装置和方法，其中在可用频率带宽内分配了前向/上行链路部分和返回/上行链路部分。 更具体地，服务区域被划分为多个区域。 返回/上行链路部分的前向/上行链路部分的分配在多个区域中进行混洗。 该装置和方法可以在多波束无线通信系统中实现。

Patent Agency Ranking