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1、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AbstractHualongSecuritiesCo.,Ltd.isacomprehensivesecuri
2、tiesoperatingagency，includingsharebroking,investmentbanking,securitiesinvestmentconsultation,financialadviserandotherbusinessesapprovedbyChinaSecuritiesRegulatoryCommission.Thecompanyhasextensivecustomerresourcesandgoodsocialimage,andhasestablished35managementagenciesinBeijing,Shanghai,Shenzhen,Chon
3、gqing,Hangzhou,Wuxi,Urumqi,HefeiandLanzhou,andsetupaprofessionalinvestmentbankbranchinBeijing,andinitiatedtheestablishmentoftheChinesefundmanagementcompany,holdingHualongFuturesCompany.Withthegradualincreaseofthecompany'sbusiness,thescopeofbusinesswillalsoexpand.Accordingtotheplananddevelopmentofthe
4、headquarters,thecompanyhasdecidedtosetupnewbranchesinsecond-tiercity-Xi’antoexpandthemanagementscope.ThisprojectistheoveralldesignofXi’anBusinsessDepartment’sinformationsystem;tomeetthesteadydevelopmentofcompanybusinessesandtheindustrystandardsofthesecuritiesandfinancialinstitutions,theprojectisdivi
5、dedintonineparts:theoveralldesignanddecorationofgeneratorroom,powersupplysystem,lightningprotectionandgroundingsystem,accesscontrolsystem,broadcastiongsystem,monitorsystem,multimediaTVandbroadcastsystem,thecomprehensivewiringsystem,andNetworkplanninganddesign.Theestablishmentofnewbrancheswillmeanthe
6、coverageofallHualongsecuritiesbusinessesinthisarea.Besidesitwillcreatenewbusinesseswithbanksandfuturescompanies.That’swhythenewdesignofnetworkinformationplatformwillmeettherequirementsofsafety,stability,linkredundancyandmakesurethenetworksecurityequipmentimplementthehotrequirementstoguaranteethestea
7、dydevelopmentofbusinesses.Theproperstructureofinformationsystemcandecreasethemanagementdepartment'sbusinesslossduetothebreakdownofinformationsystem,whichisconvenientforthegovernertosustain,manageandgu
