Enabling a digital wireless service for a mobile station across two different wireless communications environments
    2.
    发明申请
    Enabling a digital wireless service for a mobile station across two different wireless communications environments 审中-公开
    为跨越两个不同无线通信环境的移动台启用数字无线服务

    公开(公告)号:US20070161347A1

    公开(公告)日:2007-07-12

    申请号:US11329370

    申请日:2006-01-10

    IPC分类号: H04B7/15

    CPC分类号: H04B7/18506

    摘要: A method and an apparatus for enabling a digital wireless service across a first and a second wireless communications environment is provided. The method comprises translating a receive signal carried on a forward link and having a first carrier frequency in the first wireless communications environment from a first frequency band to a second frequency band different from the first frequency band. The method further comprises translating a transmit signal carried on a reverse link and having a second carrier frequency in the first wireless communications environment from the second frequency band to the first frequency band. In this way, a digital wireless service may be provided between a mobile station and at least one base station on the ground across two different wireless communications environments. The method further comprises compensating Doppler shift separately for individual beams directed at a plurality of terrestrial base stations. The method further comprises injecting an additional path delay to insure that the terrestrial base stations receive reverse link signals at substantially similar round trip time offsets and to reduce search windows for the terrestrial base stations. In this way, a wireless communication system may enable in-flight use of a mobile station to communicate with one or more base stations on the ground.

    摘要翻译: 提供了一种用于在第一和第二无线通信环境中实现数字无线服务的方法和装置。 该方法包括将在前向链路上承载的接收信号转换为第一无线通信环境中的第一载波频率从第一频带转换到与第一频带不同的第二频带。 该方法还包括将在反向链路上承载的发送信号转换为第一无线通信环境中的从第二频带到第一频带的第二载波频率。 以这种方式,可以在两个不同的无线通信环境之间的移动台和地面上的至少一个基站之间提供数字无线服务。 该方法还包括分别针对指向多个地面基站的各个波束补偿多普勒频移。 该方法还包括注入额外的路径延迟以确保地面基站以基本相似的往返时间偏移接收反向链路信号,并减少地面基站的搜索窗口。 以这种方式,无线通信系统可以使移动台的飞行中使用能够与地面上的一个或多个基站进行通信。