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    SYSTEM AND METHOD FOR PRE-DISTORTION AND ITERATIVE COMPENSATION FOR NONLINEAR DISTORTION IN SYSTEM EMPLOYING FTN SYMBOL TRANSMISSION RATES
    5.
    发明授权
    SYSTEM AND METHOD FOR PRE-DISTORTION AND ITERATIVE COMPENSATION FOR NONLINEAR DISTORTION IN SYSTEM EMPLOYING FTN SYMBOL TRANSMISSION RATES 有权

    公开(公告)号：EP3055962B1

    公开(公告)日：2018-12-05

    申请号：EP14853035.5

    申请日：2014-10-08

    申请人： Hughes Network Systems, LLC

    发明人： BEIDAS, Bassel ,  SEHADRI, Rohit, Lyer ,  EROZ, Mustafa ,  LEE, Lin-Nan

    IPC分类号： H04B1/04 ,  H04B7/185

    CPC分类号： H04B7/18517 ,  H03F1/3241 ,  H04B1/0475 ,  H04B2001/0425

    摘要： A signal transmission approach comprises encoding a source signal (comprising a plurality of source symbols) to generate a corresponding encoded signal. The encoded signal is modulated by mapping each source symbol to a respective signal constellation point of an applied signal constellation to generate a modulated signal. The modulated signal is pre-distorted based on a distortion estimate to generate a pre-distorted signal. The pre-distorted signal is filtered to generate a filtered signal. The filtered signal is frequency translated and amplified to generate a transmission signal for transmission via an uplink channel of a satellite communications system. To increase throughput, the source signal is processed through the apparatus and the resulting transmission signal is generated at a Faster-than-Nyquist (FTN) symbol rate and with a tight frequency roll-off. The modulated signal is pre-distorted based on a distortion estimate relating to the nonlinearity and the filters applied before and/or after the pre-distorter.

    WIDEBAND AND NARROWBAND RECEIVER
    7.
    发明授权
    WIDEBAND AND NARROWBAND RECEIVER 有权

    公开(公告)号：EP3241288B1

    公开(公告)日：2018-06-06

    申请号：EP15828805.0

    申请日：2015-12-29

    申请人： Hughes Network Systems, LLC

    发明人： EAPEN, George ,  YUAN, Yong, Kang ,  HARRINGTON, Emanuel, Girard

    IPC分类号： H04B7/185

    CPC分类号： H04L27/22 ,  H03M1/12 ,  H04B7/18517 ,  H04L27/345

    摘要： Systems and methods provide a receiver design capable of both wideband (high symbol rate) and narrowband (low symbol rate) operations requirements without compromising narrowband performance. Moreover, such a receiver design can be very low cost, and eschewing the need for any expensive and/or specialized elements. A receiver configured in accordance with various embodiments utilizes a fully integrated tuner in which narrowband filters are configured to be bypassable when in wideband (high symbol rate) mode in favor of fixed wideband filters. Additionally, an analog-to-digital converter (ADC) can be implemented with digital gain for wideband operation, as well as digital data bit mapping to accommodate industry standard application-specific integrated circuits (ASICs) interfaces, such as from a 12 bit ADC core to an 8 bit digital interface.

    SYSTEM AND METHOD FOR MOBILE COMMUNICATION THROUGH GEOSTATIONARY SATELLITES
    8.
    发明授权
    SYSTEM AND METHOD FOR MOBILE COMMUNICATION THROUGH GEOSTATIONARY SATELLITES 有权
    通过地球静止卫星进行移动通信的系统和方法

    公开(公告)号：EP3178171B1

    公开(公告)日：2018-03-14

    申请号：EP16724478.9

    申请日：2016-04-17

    申请人： Hisky SCS Ltd.

    发明人： ZACHARIA, Berejik ,  LITOCHEVSKI, Mordechai ,  KRAVITZ, Shahar

    IPC分类号： H04B7/185 ,  G01S3/42

    CPC分类号： H04B7/18545 ,  H04B7/18517

    摘要： A system and a method for use in satellite communication are presented. The system comprising (a) one or more antenna units for receiving and transmitting electromagnetic radiation in selected frequency ranges, (b) a modem unit configured for modulating received input signals and modulating output electronic data to signals to be transmitted, (c) a processor unit connected to said one or more antenna units and to said modem unit. The processor unit comprises: antenna orientation optimizer module configured and operable for varying azimuth and elevation of signal transmission and reception the antenna units; and network registration module configured and operable for registering the system to a communication network. The registering comprising: selecting a free private communication channel provided by the network, generating a corresponding signal sequence for transmission to a hub. The registering module is configured to be responsive to appropriate notification signals in said private communication channel.

    INDOOR SATELLITE COMMUNICATION
    9.
    发明授权
    INDOOR SATELLITE COMMUNICATION 有权
    室内卫星通信

    公开(公告)号：EP3016300B1

    公开(公告)日：2018-02-28

    申请号：EP15191389.4

    申请日：2015-10-26

    申请人： Gilat Telecom Ltd.

    发明人： GUREWITZ, Aaron

    IPC分类号： H04B7/185

    CPC分类号： H01Q3/02 ,  H01Q13/02 ,  H01Q15/24 ,  H04B7/18517

    摘要： A system for obstructed satellite communication, comprising: an outdoor satellite antenna (107) adapted to receive and transmit an electromagnetic satellite signal at a radiation frequency with a geosynchronous satellite, wherein said outdoor satellite antenna is directed towards said geosynchronous satellite along a line of sight; at least one directional antenna (103) adapted to receive and transmit an obstructed electromagnetic signal at same said radiation frequency, wherein each of said at least one directional antenna comprises a feedhorn that is parallel to said line of sight and opposite in direction from said geosynchronous satellite and wherein said at least one directional antenna is adapted to be mounted on a far side of a physical obstruction away from said geosynchronous satellite; and a relay ampl ifi er device (101) adapted to send and receive sai d electromagnetic satellite signal and said obstructed electromagnetic signal between respective said outdoor satellite antenna and said at least one directional antenna; wherein said physical obstruction prevents said electromagnetic satellite signal from being received at an obstructed location on said far side and prevents said obstructed electromagnetic signal originating at said obstructed location from being received by said geosynchronous satellite.