介绍两类同步方法都是采用滑动相关寻找峰值的办法，区别在于使用的相关器模板和先验信息。每种方法在具体实现上又可分为：串行搜索和并行搜索-Introduce two types of synchronization methods are used to find the peak sliding correlation approach, the difference lies in the use of the correlator template and a priori informati