According to the gjb 2077 - 94 and the requirement of automatic radio of haige communication co . , a new way of bit synchronization is put forward . this article discusses the design of 8 - fsk modulating and demodulating , signal detection , and fec encoding , based on the technique of bit synchronization . ale module is optimized and mended in its application , because it is a module of automatic radio of the company 本文根据gjb2077 - 94短波自适应通信系统自动线路建立规程和海格通信公司短波自适应电台对ale模块的具体需求，采用了一种新的位同步方法：能量跟踪法，并在此基础上提出了8fsk调制解调，信号检测，前向纠错编码的具体实现方法。
It first introduces the mpeg - 2 standard and the grammar structure of the ts . then it describes the principle of synchronization and multiplexing in digital communication . the synchronization comprises the carrier synchronization , bit synchronization , group synchronization and network synchronization while the multiplexing includes bit multiplexing , word multiplexing and frame multiplexing 本文首先介绍了mpeg _ 2标准及其mpeg _ 2传输流语法结构，接着阐述了数字通信中的同步和复接理论，同步包括载波同步、位同步、群同步和网同步，复接包括按位复接、按字复接、按帧复接。
