前言近年来,随着计算机网路及数字通信的迅速发展,尤其是微型计算机技术与通信技术的结合,使人们对数字传输系统不断提出了更高的要求;必须使其朝着数字化,集成化方面迈进。调制解调器在数字传输中是使数字信息进入模拟信道的一个极为重要的环节。将调制解调器集成化、数字化,不论是对提高设备性能还是降低成本都是具有重大意义的。 Preface In recent years, with the rapid development of computer networks and digital communications, especially the combination of microcomputer technology and communication technology, people are constantly putting forward higher requirements on digital transmission systems; they must be digitized and integrated Aspects. Modems in digital transmission is to make digital information into the analog channel is a very important part. Integrating and digitizing modems is of great importance both for improving device performance and for reducing costs.