Method and apparatus for frame synchronization
    2.
    发明授权
    Method and apparatus for frame synchronization 有权
    帧同步方法和装置

    公开(公告)号:US07388881B2

    公开(公告)日:2008-06-17

    申请号:US11067968

    申请日:2005-02-28

    IPC分类号: H04J3/22

    CPC分类号: H04L7/10 H04B1/7073

    摘要: A system for receiving and handling a scrambled input data signal that includes a preamble with a start of frame delimiter (SFD) initiates an SFD search on the scrambled input data, thereby attempting to save an initialization period. The initialization period may be of the order of 7 uS, and its saving results in improved timeline management enabling antenna diversity and the possible use of high performance algorithms. The system may use two parallel paths for signal processing, each having an SFD detector and a descrambler. If the detected SFD is short, then the second path is disabled, and if it is long, then the first parallel path is disabled. Alternatively, the first path can be used for a finite period of time (for e.g., 40 symbols) and if the SFD is still not detected, the first path is disabled, and the system uses only the second path.

    摘要翻译: 用于接收和处理包括具有帧定界符(SFD)开始的前同步码的加扰输入数据信号的系统启动对加扰输入数据的SFD搜索,从而尝试保存初始化周期。 初始化时间可以是7μS的量级,并且其保存导致改进的时间线管理,使天线分集和可能使用高性能算法。 系统可以使用两个并行路径进行信号处理,每个路径都有一个SFD检测器和一个解扰器。 如果检测到的SFD短,则禁用第二条路径,如果长度不等,则第一条并行路径被禁用。 或者,第一路径可以用于有限的时间段(例如,40个符号),并且如果尚未检测到SFD,则禁用第一路径,并且系统仅使用第二路径。