Time determination in satellite positioning system receivers and methods therefor
    1.
    发明授权
    Time determination in satellite positioning system receivers and methods therefor 有权
    卫星定位系统接收机的时间确定及其方法

    公开(公告)号:US06944540B2

    公开(公告)日:2005-09-13

    申请号:US10108409

    申请日:2002-03-28

    摘要: Method in a Global Positioning System (GPS) receivers, including determining pseudorange (PNR) measurements for at least four satellites (210), determining a coarse time (220) corresponding to the pseudorange measurement, determining an offset time (240) between a periodic GPS event of one of the four satellites and the coarse time, determining a time correction delta (250) based upon the period of the Periodic GPS event, the offset time and the coarse time if an error of the coarse time is less than ½ the period of the periodic GPS event, and determining corrected time (260) based upon the coarse time and the time correction delta if the error of the coarse time is less than ½ the period of the periodic GPS event.

    摘要翻译: 全球定位系统(GPS)接收机中的方法,包括确定至少四颗卫星(210)的伪距(PNR)测量,确定对应于伪距测量的粗略时间(220),确定周期性 四个卫星之一的GPS事件和粗略时间,基于周期性GPS事件的周期,如果粗略时间的误差小于1/2的偏移时间和粗略时间,则确定时间校正增量(250) 周期性GPS事件的周期,并且如果粗略时间的误差小于周期性GPS事件的周期的1/2,则基于粗略时间和时间校正增量来确定校正时间(260)。