初相注入式快速符号同步的一种实现方法

A Realization Method of Initial Phase Presetting Fast Symbol Synchronization

通过平方滤波算法对时钟初相进行预估计,实现了Gardner算法下初相注入式符号同步。该方法具有快速、高精度的特点,尤其是较好地解决了初始点为过零点的极端情况下,Gardner算法收敛方向不确定、收敛时间较长的问题。计算机仿真和实际应用证实了该方法的有效性。

Initial phase presetting symbol synchronization of Gardner algorithm is realized by pre - estimating the initial clock phase with square timing algorithm. The proposed method can achieve fast convergence as well as high accuracy of estimation. It also solves the equivocation and slow convergence problems existing under the extreme condition that the crossing - zero is the initial sample of Gardner algorithm. The validity of the method has already been proved by simulation and implementation.