说明：  4G通信关键技术演进 随着世界范围内第三代移动通信系统逐步实施，移动通信未来的发展及演进问题成了研究热点。本文介绍了第四代移动通信及其性能和系统网络结构及OFDM、软件无线电、智能天线、IPv6等关键技术，并分析了4G移动通信系统与3G移动通信的关系，并对通信系统演进做了展望。
(Communication the key to the evolution of 4G technology around the world with the third-generation mobile communication system being implemented gradually and the future development of mobile communications and the evolution of research has become an issue of hot spots. This paper introduces the fourth generation mobile communication system network and its performance and structure and OFDM, software radio, smart antenna, IPv6 and other key technologies, and analyzes the 4G mobile communication system and the relationship between the 3G mobile communications and the evolution of communication systems to do the Prospect.)