System and method for recovering system time in direct sequence spread spectrum communications
    2.
    发明授权
    System and method for recovering system time in direct sequence spread spectrum communications 有权
    在直接序列扩频通信中恢复系统时间的系统和方法

    公开(公告)号:US07403507B2

    公开(公告)日:2008-07-22

    申请号:US09883740

    申请日:2001-06-18

    IPC分类号: H04B7/216

    摘要: A sleep control system and method are provided that permit a reference clock and the direct sequence spread spectrum (DSSS) modem in a mobile station receiver to be turned off and turned back on at arbitrary points in time while still maintaining accurate base station system time. Accurate timing is made possible through a number of techniques including precise initial calibration using a rising edge/falling edge averaging system, determining the sleep clock and reference clock frequencies, and the determination of the frequency drift of the sleep clock that occurred during the previous sleep interval.

    摘要翻译: 提供一种睡眠控制系统和方法,其允许移动台接收机中的参考时钟和直接序列扩频(DSSS)调制解调器在任意时间点被关闭并重新接通,同时仍保持精确的基站系统时间。 通过包括使用上升沿/下降沿平均系统的精确初始校准,确定睡眠时钟和参考时钟频率以及确定在先前睡眠期间发生的睡眠时钟的频率漂移的许多技术,可以实现准确的定时 间隔。