信源长度为32位，发出信号前8位为群同步码，后24位为数字信源；信源速率为256bit/s。采用模块化设计方法进行系统设计-Source length of 32, a signal for the group before the 8-bit synchronous code, after the 24-bit digital source　source rate of 256bit/s. Modular design approach to system design