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    Frame timing synchronization in a geostationary satellite system
    3.
    发明授权
    Frame timing synchronization in a geostationary satellite system 有权
    地球静止卫星系统中的帧定时同步

    公开(公告)号：US09166675B2

    公开(公告)日：2015-10-20

    申请号：US14265356

    申请日：2014-04-29

    申请人： Hughes Network Systems, LLC

    发明人： Udaya Bhaskar ,  Yezdi Antia ,  Satyajit Roy

    IPC分类号： H04B7/204 ,  H04W56/00

    CPC分类号： H04B7/2048 ,  H04B7/18513 ,  H04B7/2125 ,  H04W56/001

    摘要： Aspects of the invention provide a system and method to allow inroute frame timing synchronization without the aid of hub signal loopback or satellite ephemeris data. Furthermore, it allows tracking and compensating of the satellite motion to allow multiple remotes to use TDMA on the inroute frequencies, while minimizing the aperture. Two main techniques proposed are CLT and polling based approaches, which are used in combination for an optimum solution. In CLT based approach, hub transmits remote specific timing correction feedback messages on the outroute on as needed basis. In polling based approach, the remotes derive their timing based on a per-beam average delay estimate broadcast by the hub and a measured local delay specific to each outroute stream from a remote. An aspect of the invention uses triangulation method to determine satellite position. Furthermore, an aspect of the invention uses hub burst arrival method instead of polling approach.

    摘要翻译： 本发明的方面提供了一种系统和方法，其允许在无需集线器信号环回或卫星星历数据的帮助下进行帧定时同步。 此外，它允许跟踪和补偿卫星运动，以允许多个遥控器在最小化孔径的同时使用TDMA在路由频率上。 提出的两个主要技术是基于CLT和轮询的方法，它们被组合用于最佳解决方案。 在基于CLT的方法中，集线器根据需要在远端传输远程特定定时校正反馈消息。 在基于轮询的方法中，遥控器基于由集线器广播的每个波束的平均延迟估计和来自远程的每个外向流特定的测量的本地延迟导出其定时。 本发明的一个方面使用三角测量方法来确定卫星位置。 此外，本发明的一个方面使用集线器突发到达方法而不是轮询方法。

    Acquisition system for the SDMA/TDMA satellite communication system
    4.
    发明授权
    Acquisition system for the SDMA/TDMA satellite communication system 失效
    SDMA / TDMA卫星通信系统采集系统

    公开(公告)号：US3958083A

    公开(公告)日：1976-05-18

    申请号：US551675

    申请日：1975-02-21

    申请人： Takao Hara ,  Yoshikazu Tsuji ,  Yasuhiko Sakamoto

    发明人： Takao Hara ,  Yoshikazu Tsuji ,  Yasuhiko Sakamoto

    IPC分类号： H04B7/204 ,  H04J3/06 ,  H04B7/20

    CPC分类号： H04B7/2048

    摘要： An acquisition system for the SDMA/TDMA satellite communication system is disclosed in which a synchronization signal receiving time slot and a plurality of data signal receiving time slots, for communication between predetermined groups of earth stations and between the earth stations of each group, are sequentially provided at the satellite based on timing signal in the satellite. An acquisition signal having a plurality of signal burst portions is transmitted from the earth station, with its transmit time slot being shifted in a first sweep mode until one part of the acquisition signal is received by said transmitting earth station. At that time the transmit time slot is shifted in a second sweep mode, whereby a control is made to obtain synchronization of the earth station with the satellite so that the plurality of burst portions in the acquisition signal may be properly communicated to the predetermined groups.Further, an acquisition control is shown to be effectively achieved in the case where the SN ratio of the received acquisition signal is extremely deteriorated or where it is necessary to prevent disturbing another earth station of the same group of earth stations which has already accessed the satellite.

    摘要翻译： 公开了一种用于SDMA / TDMA卫星通信系统的采集系统，其中同步信号接收时隙和多个数据信号接收时隙用于在预定的地球站组之间和每个组的地球站之间进行通信， 基于卫星中的定时信号在卫星上提供。 具有多个信号突发部分的获取信号从地球站发射，其发射时隙以第一扫描模式移位，直到所述发射地球站接收到采集信号的一部分。 此时，发送时隙在第二扫描模式中移位，由此进行控制以获得地球站与卫星的同步，使得采集信号中的多个突发部分可以适当地传送到预定的组。

    HUB COMMUNICATION WITH A SATELLITE NETWORK OR A TERRESTRIAL NETWORK
    5.
    发明公开
    HUB COMMUNICATION WITH A SATELLITE NETWORK OR A TERRESTRIAL NETWORK 审中-公开

    公开(公告)号：US20240223268A1

    公开(公告)日：2024-07-04

    申请号：US18607664

    申请日：2024-03-18

    申请人： Skylo Technologies, Inc.

    发明人： Andrew Nuttall ,  Moshe Noah ,  Vijay Lewis ,  Meghna Agrawal ,  Kalle Ruttik ,  Yihenew Dagne Beyene ,  Barry Winata

    IPC分类号： H04B7/185 ,  H04B7/155 ,  H04B7/204

    CPC分类号： H04B7/18582 ,  H04B7/1555 ,  H04B7/18586 ,  H04B7/2048

    摘要： Apparatuses, methods, and systems of hub communication with a satellite network or a terrestrial network are disclosed. One method includes determining a propagation delay between a wireless communication device and a base station of a satellite network, adjusting, by the wireless communication device, a timing offset between transmit and receive radio frames at the wireless communication device based on whether the satellite network or a terrestrial network is selected, and based at least on the propagation delay, configuring air interface communication protocol timer values including at least a wait time for a response based on at least a frame offset between uplink and downlink frames at the base station of the satellite network, and communicating, by the wireless communication device, with the base station of the satellite network when the satellite network is selected, and with a base station of the terrestrial network when the terrestrial network is selected.

    APPARATUS AND METHOD FOR PHASE UNWRAPPING OF A BURST SIGNAL
    10.
    发明申请
    APPARATUS AND METHOD FOR PHASE UNWRAPPING OF A BURST SIGNAL 有权
    一种BURST信号相位不同的装置和方法

    公开(公告)号：US20160285615A1

    公开(公告)日：2016-09-29

    申请号：US15081592

    申请日：2016-03-25

    申请人： VT IDIRECT, INC.

    发明人： Ronggang QI ,  Baoyan DING

    IPC分类号： H04L7/00

    CPC分类号： H04B1/10 ,  H04B1/70752 ,  H04B1/7077 ,  H04B1/709 ,  H04B7/2048 ,  H04B7/2125 ,  H04B7/2656 ,  H04L5/0053 ,  H04L7/0041 ,  H04L25/021 ,  H04L25/0228 ,  H04L27/0014 ,  H04L27/2278 ,  H04W56/0035

    摘要： A device and method for unwrapping phase samples of a burst signal. The device generates a set of vectors including phase samples. A first mean and a first variance of the vectors is computed, and a set of unwrapped phase samples of the burst signal are computed by rotating phase samples of the vector having a smallest first variance by a first rotation amount. The set of vectors is updated based on a new phase sample and a second mean and a second variance of the updated set of vectors is computed. Differences between unwrapped phase samples and a number of phase samples included in the vector having the smallest computed second variance are computed. A next unwrapped phase sample is generated by rotating the new phase sample by a second rotation amount corresponding to a median value of the computed differences.

    摘要翻译： 一种用于展开脉冲串信号的相位采样的装置和方法。 该装置产生一组包括相位样本的向量。 计算矢量的第一均值和第一方差，并且通过将具有最小第一方差的向量的相位样本旋转第一旋转量来计算突发信号的展开相位样本集合。 基于新的相位样本来更新向量集合，并且计算更新的向量集合的第二平均值和第二方差。 计算解卷积相位样本与包含在具有最小计算第二方差的向量中的多个相位样本之间的差异。 通过将新相位样本旋转与计算出的差的中值对应的第二旋转量来产生下一个展开相位样本。