目前广泛采用的帧同步方案,都由帧同步识别器、相位比较器、一致计数器、不一致计数器和状态控制电路所组成,如象二次群异步数字复接设备,以及基群、二次群同步复接设备(参见微波接力通信系统方案审定会议文件)。本文对上述方案加以改进后提出一种简化方案,其特点是容易调试,电路比较简单,性能稳定且具有快捕功能。 Currently widely used frame synchronization schemes are composed of a frame synchronization identifier, a phase comparator, a coincidence counter, an inconsistent counter, and a state control circuit, such as a quadratic group asynchronous digital multiplex device, and a group, quadratic group synchronization Multiplexing equipment (see protocol review meeting document for Microwave Relay Communication Systems). This article is to improve the above program to propose a simplified program, which is characterized by easy debugging, the circuit is relatively simple, stable performance and fast capture function.