前言:数字通信的一个主要标志是能够实现人和机器、机器和机器间的通信、而数字通信系统的集成化又推动了该技术的发展。这是因为数字通信电路的集成化,使数字通信设备体积大为缩小,同时其性能和可靠性均有很大的提高。数字调制解调器是数字通信系统中一个重要组成部分,它的集成化无疑是很有意义的。 Foreword: A major hallmark of digital communications is the ability to communicate between people and machines, machines, and machines. The integration of digital communications systems is driving this technology. This is because the integration of digital communication circuits, digital communications equipment greatly reduced size, while its performance and reliability have greatly improved. Digital modem is an important part of digital communication system, its integration is undoubtedly makes sense.