METHOD AND APPARATUS FOR TIME OR FREQUENCY SYNCHRONIZATION IN NON-GEOSYNCHRONOUS SATELLITE COMMUNICATION SYSTEMS
    107.
    发明申请
    METHOD AND APPARATUS FOR TIME OR FREQUENCY SYNCHRONIZATION IN NON-GEOSYNCHRONOUS SATELLITE COMMUNICATION SYSTEMS 有权
    非地球卫星通信系统中时间或频率同步的方法与装置

    公开(公告)号:US20160278033A1

    公开(公告)日:2016-09-22

    申请号:US14862822

    申请日:2015-09-23

    Abstract: Method and apparatus for time or frequency synchronization of radio signals transmitted by user terminals in communication with a gateway through a satellite is provided. The satellite may be part of a non-synchronous satellite communication system, such as a low-earth orbit (LEO) satellite communication system for data, voice or video communications. Times of transmission of return link radio signals from the user terminals may be adjusted such that the signals arrive at the satellite or at the gateway without large time delay differentials. Carrier frequencies of return link radio signals transmitted from the user terminals may be adjusted such that the signals arrive at the satellite or at the gateway without large frequency offset differentials.

    Abstract translation: 提供了用于通过卫星与网关通信的用户终端发送的无线电信号的时间或频率同步的方法和装置。 卫星可以是非同步卫星通信系统的一部分,例如用于数据,语音或视频通信的低地球轨道(LEO)卫星通信系统。 可以调整来自用户终端的返回链路无线电信号的传输时间,使得信号到达卫星或网关而没有大的时间延迟差。 可以调整从用户终端发送的返回链路无线电信号的载波频率,使得信号到达卫星或网关而没有大的频率偏移差分。

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