卷积码是深度空间通信系统和无线通信系统中常用的一种差错控制编码。它克服了分组码由于以码块为单位编译码而使分组间的相关信息丢失的缺点。（2，1，8）卷积码在2G、3G通信系统-The convolutional code is used in deep space communication system and a wireless communication system an error control coding. It overcomes the block code and the