通信是信息社会的支柱,是社会的神经系统。通信技术属于高技术,更新换代快,是当代几个最活跃的科技领域之一。纵观近几年来的情况,通信将走向何方,概括起来讲,通信正在向高速、个人、智能、多媒体方向迅速发展。·高速通信高速指传输速率高,一般是千兆比/秒以上的信息率。信息率高就是传输频带宽,亦即通信容量大。要达到这个目的,非光纤通信莫 Communication is the backbone of the information society and the social nervous system. Communication technology is high technology, fast replacement, is one of the most active in the field of science and technology. Looking at the situation in recent years, where communications will go, in a nutshell, communication is rapidly evolving toward high-speed, personal, intelligent and multimedia. High-speed communication refers to the high-speed high-speed transmission rate, the general rate of Gigabit / sec information rate. High information rate is the transmission bandwidth, which means that the communication capacity. To achieve this goal, non-optical communication Mo