资源描述：
《毕设外文原文及译文.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、北京联合大学毕业设计（论文）任务书题目：OFDM调制解调技术的设计与仿真实现专业：通信工程指导教师：张雪芬学院：信息学院学号：32班级：1101B姓名：徐嘉明一、外文原文EvolutionTowards5GMulti-tierCellularWirelessNetworks:AnInterferenceManagementPerspectiveEkramHossain,MehdiRasti,HinaTabassum,andAmrAbdelnasserAbstract—Theevolvingfifthgeneration(5G)cellular
2、wirelessnetworksareenvisionedtoovercomethefundamentalchallengesofexistingcellularnetworks,e.g.,higherdatarates,excellentend-to-endperformanceanduser-coverageinhot-spotsandcrowdedareaswithlowerlatency,energyconsumptionandcostperinformationtransfer.Toaddressthesechallenges,5G
3、systemswilladoptamulti-tierarchitectureconsistingofmacrocells,differenttypesoflicensedsmallcells,relays,anddevice-to-device(D2D)networkstoserveuserswithdifferentquality-of-service(QoS)requirementsinaspectrumandenergy-efficientmanner.Startingwiththevisionsandrequirementsof5G
4、multi-tiernetworks,thisarticleoutlinesthechallengesofinterferencemanagement(e.g.,powercontrol,cellassociation)inthesenetworkswithsharedspectrumaccess(i.e.,whenthedifferentnetworktierssharethesamelicensedspectrum).Itisarguedthattheexistinginterferencemanagementschemeswillnot
5、beabletoaddresstheinterferencemanagementprobleminprioritized5Gmultitiernetworkswhereusersindifferenttiershavedifferentprioritiesforchannelaccess.Inthiscontext,asurveyandqualitativecomparisonoftheexistingcellassociationandpowercontrolschemesisprovidedtodemonstratetheirlimita
6、tionsforinterferencemanagementin5Gnetworks.Openchallengesarehighlightedandguidelinesareprovidedtomodifytheexistingschemesinordertoovercometheselimitationsandmakethemsuitablefortheemerging5Gsystems.IndexTerms—5Gcellularwireless,multi-tiernetworks,interferencemanagement,cella
7、ssociation,powercontrol.I.INTRODUCTIONTosatisfytheever-increasingdemandformobilebroadbandcommunications,theIMT-Advanced(IMT-A)standardshavebeenratifiedbytheInternationalTelecommunicationsUnion(ITU)inNovember2010andthefourthgeneration(4G)wirelesscommunicationsystemsarecurren
8、tlybeingdeployedworldwide.ThestandardizationforLTERel-12,alsoknownasLTE-B,isalsoon
