HDTV接收机的位同步系统

The Bit Synchronization System of HDTV Receiver

本文参照美国大联盟（ＧＡ）ＨＤＴＶ传输系统的有关标准，给出了一种基于数据辅助（ＤＡ）算法的位同步系统实现方案。文中讨论了作为辅助数据的段同步图案对位同步性能的影响，并给出了系统在噪声条件下的收敛性和抖动性能的仿真结果。该系统对于基带数据流含有段、帧同步的通信场合具有一定的适用性。

With reference to the relevant specifications of GA HDTV transmission system,this paper presents an implementation scheme of the bit synchronization system of HDTV receiver.It is based on the data-aided (DA)timing recovery algorithm.The influence of the pattern of the data segment sync here used as aid data to the system performance is discussed ,and the convergence and jitter characteristics under noise conditions are also analyzed.Simulation results show that this bit synchronization system performs well and is widely applicable to fields where the data stream contains periodic segment syncs.