第5代移动通信技术及发展趋势

第5代移动通信技术（ fifth-generation,5G）是继4G之后,为了满足智能终端的快速普及和移动互联网的高速发展而正在研发的下一代无线移动通信技术,是面向2020年以后人类信息社会需求的无线移动通信系统。首先介绍了5G的概念、应用展望及性能特征；然后重点阐述了5G的关键技术,包括高频段传输技术、新型多天线传输技术、设备间直接通信技术以及密集网络技术技术等；最后分析了发展5G技术面临的挑战。

Technologies and Future Development Trend of 5 G Mobile Communication System

The fifth-generation（5G） mobile communication technology,as the next generation wireless mo-bile communication technology following the 4G communication,is now intensively researched and devel-oped ,thus to meet the rapid popularization of intelligent terminals and the fast development of mobile inter-net,and furthermore,to meet the information requirement of human society after 2020. The basic concep-tion,application prospects and performance of 5G are described firstly in this paper. Then, the key tech-nologies of 5G are illustrated emphatically, such as high frequency transmission, multi-antenna transmis-sion, point-to-point communication and dense networks. Finally, the challenges faced in the development of 5G are discussed in detail.