3G通信系统向4G通信系统的演化进程

The Evolutionary Process of Communication System from 3G to 4G

为了解决3G移动通信系统具有一定的局限性,提出了4G移动通信系统。介绍了4G的特点,对比了3G与4G各种技术指标。重点阐述了4G的网络结构和关键技术,包括OFDM等。

4G communication system is proposed in order to resolve the disadvantages of 3G communication system. In this paper, advantages of 4G communication system and technology items between 3G and 4G communication systems are given. The network architecture and key technologies, including OFDM, are illustrated.