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    • 77. 发明公开
    • SYNCHRONIZATION IN A GEOSTATIONARY SATELLITE SYSTEM
    • 在EINEM地球环境卫星系统中的同步
    • EP2853043A4
    • 2016-01-13
    • EP13793496
    • 2013-05-23
    • HUGHES NETWORK SYSTEMS LLC
    • UDAYA BHASKARYEZDI ANITASATYAJIT ROY
    • H04B7/204H04W56/00
    • H04B7/2048H04B7/18513H04B7/2125H04W56/001
    • 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.
    • 本发明的方面提供了一种系统和方法,其允许在不需要集线器信号环回或卫星星历数据的情况下进行帧定时同步。 此外,它允许跟踪和补偿卫星运动,以允许多个遥控器在路由频率上使用TDMA,同时最小化孔径。 提出的两个主要技术是基于CLT和轮询的方法,其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中枢突发到达方法而不是轮询方法。
    • 80. 发明公开
    • Method of multimode access in satellite communications and frame structure for said multimode access
    • 在卫星通信和帧结构的多模式接入方式为这种模式多个接入
    • EP1069710A1
    • 2001-01-17
    • EP99500120.3
    • 1999-07-15
    • ALCATEL
    • Rodriguez Martinez, Ma. AfricaOrtega Rodriguez, Fernando
    • H04B7/185H04B7/26
    • H04B7/2048
    • A method of multimode access in a radio communications system in general and in a satellite communications system in particular, and a frame structure for use in such method. The radio communications system comprises at least a first and a second transmission modes with different transmission rates. According to the invention by allocating an information symbols part within an entire frame of one of said transmission modes based on a predetermined proportion of said information symbols part with respect to said entire frame a new transmission symbol rate is obtained which is set to be the same as that of the second transmission mode, thus allowing for the combination of said first and second modes for transmission in the same transmission symbol rate.
    • 的在无线电通信系统中的多模式接入在一般和特别是卫星通信系统的方法,以及用于搜索方法使用的帧结构。 无线电通信系统包括至少一个第一和具有不同传输速率的第二传输模式。 通过在基于所述信息码元部分的相对于预定的比例,以所述整个帧,所述传输模式之一的整体框架内分配到的信息符号部分。根据本发明的新传输的符号率获得被设定所有为相同 象第二传输模式的,因此允许所述第一和第二模式在同一传输符号速率传输的组合。