4G网络通信技术研究论文培训.doc

4G网络通信技术研究 摘 要 通信技术日新月异，给人们带来不少享受。随着数据通信与多媒体业务需求的发展，适应移动数据、在我们还没有完全享受3G移动通信系统商所带来服务的同时，4G移动通信技术的研究已经在逐步的进行着。本文简要分析了：（1）4G的网络结构：（2）4G的关键技术，如OFDM，软件无线电，只能天线技术，MIMO技术。（3）比较了3G和4G不同指标，分析了3G和4G采用的不同技术。（4）初步探讨了4G的现状和发展。 关键词：4G，网络通信 请输入您要翻译的文字内容或网页地址,回车即可翻译 ny has extensive customer resources and good social image, and has established 35 management agencies in Beijing, Shanghai, Shenzhen, Chongqing, Hangzhou, Wuxi, Urumqi, Hefei and Lanzhou, and set up a professional investment bank branch in Beijing, and initiated the establishment of the Chinese fund management company, holding Hualong Futures Company. With the gradual increase of the companys business, the scope of business will also expand. According to the plan and development of the headquarters, the company has decided to set up new branches in second-tier city-Xi’an to expand the management scope.This project is the overall design of Xi’an Businsess Department’s information system; to meet the steady development of company businesses and the industry standards of the securities and financial institutions, the project is divided into nine parts: the overall design and decoration of generator room, power supply system, lightning protection and grounding system, access control system, broadcastiong system, monitor system, multimedia TV and broadcast system, the comprehensive wiring system, and Network planning and design. The establishment of new branches will mean the coverage of all Hualong securities businesses in this area.Besides it will create new businesses with banks and futures companies.That’s why the new design of network information platform will meet the requirements of safety, stability, link redundancy and make sure the network security equipment implement the hot requirements to guarantee the steady development of businesses. The proper structure of information system can decrease the management department s business loss due to the breakdown of information system, which is convenient for the gove