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    • 8. 发明授权
    • Aiding beam identification in a satellite system
    • 辅助光束识别在卫星系统中
    • US07260411B2
    • 2007-08-21
    • US11297557
    • 2005-12-07
    • Jon J. AndersonJin DaiFrancis M. NgaiEdward B. Victor
    • Jon J. AndersonJin DaiFrancis M. NgaiEdward B. Victor
    • H04Q7/20
    • H04B7/1855
    • A system and method for determining timing offset errors in a low earth orbit satellite system based upon Doppler and Doppler rate of change is provided. A user terminal determines first and second timing offsets respectively associated with first and second satellite beams from respective first and second satellites. Next, the user terminal determines the Doppler and Doppler rate of change associated with the first and second satellite beams. A timing offset is estimated from the measured Doppler and Doppler rate of change and is then compared with the user terminal's own determined timing offset. If the comparison does not produce a value within a predetermined threshold, a beam identification error is declared.
    • 提供了一种用于基于多普勒和多普勒频率来确定低地球轨道卫星系统中的定时偏移误差的系统和方法。 用户终端确定分别与来自相应的第一和第二卫星的第一和第二卫星波束相关联的第一和第二定时偏移。 接下来,用户终端确定与第一和第二卫星波束相关联的多普勒和多普勒频率变化。 根据测量的多普勒和多普勒频率估计定时偏移,然后将其与用户终端自己确定的定时偏移进行比较。 如果比较不产生预定阈值内的值,则声明波束识别误差。