3软频率复用北邮

FinalProjectfortheBUPT/QMULJointProgrammeee05b127Page14/27/2009UndergraduateProjectReportInter-cellinterferencecancellationinOFDMAnetworkName:GengZiweiProgramme:TelecommunicationEngineeringwithManagementClass:05B05StudentNo.:ee05b127,052862Supervisor:LiangDong2009.4.26FinalProjectfortheBUPT/QMULJointProgrammeee05b127Page24/27/2009北京邮电大学本科毕业设计（论文）任务书ProjectSpecificationForm学院SchoolInternationalSchool专业ProgrammeTelecommunicationsEngineeringwithManagement班级Class05B05学生姓名NameGengZiwei学号StudentNo.052862;ee05b127班内序号No.inClass23指导教师姓名SupervisorLiangDong职称AcademicTitleDr.设计(论文)题目ProjectTopicInter-cellinterferencecancellationinOFDMAnetwork[Research]题目分类Scope1、工程实践类□研究设计类√（1、2类中各选一项在□内打√）1.Implementation□Research√2、软件√硬件□软硬结合□非软硬件□2.Softwareonly√Hardwareonly□both□N/A□主要任务及目标Maintaskandtarget：BuildupamathematicmodelofthecancellationinOFDMAnetworkandsimulateitwithMatlabtoachievethetargetthatgettingthebalanceoftheICImitigationandspectralefficiency(decreasethecancellationandimprovethespectralefficiencyasmuchaspossible)主要内容Projectdescription：OFDMA(orthogonalfrequencydivisionmultiplexaccess)isafuturebroadbandwirelessmultipleaccesstechnique.Ithasamerittoholdintra-cellorthogonalityinadditiontotheadvantagesofcompensatingthefrequency-selectivity,whichinheritsfromorthogonalfrequencydivisionmultiplexing(OFDM).SinceOFDMAsystemsusefrequency-divisionmultiplexing,theappropriatefrequencyreusefactorisrequiredformulti-cellenvironments.Iftwoneighboringcellsusethesamesubcarrier,thetransmissioninonecellinterfereswiththatintheothercell(calledasICIproblem).SotheprojectaimisthatfindaappropriatewaytocanceltheInter-cellinterferenceasmuchaspossible.thesystemcanemploytechniqueslikespectrumspreadingandmultiple-receiver-basedinterferencesuppression.ThemostfamouswayforhandlingICIistodesignthefrequencyreusefactorsuchthatthetwoneighboringcellsallocatesubcarriersexclusively.However,sincetheexclusiveusageofsub-bandforeachcelldecreasesspectralefficiency,thebetterefficientstrategyisrequiredtoincreasetotalsystemthroughputbybalancingICImitigationandspectralefficiency.Thisprojectisfocusedonthisproblem.主要参考文献Mainreferences：1.HangLizhu,WangHua,Matlabelectronicsimulationandimplementation,NationalDefenceIndustryPress2.WuDeben,LiHuimin,IntroductionofTelecommunicationsTechnology,Posts&TelecomPress3.://进度安排Work-plan：指导教师签字SupervisorSignature日期Date2008-11-9注：一式二份，学院、学生各一份。Note:Twocopies,oneforSchoolandoneforstudents’use.08.10.2008.12.1509.02.1509.03.3008.10.0109.05.01BASICWORK:1.ReadbackgroundknowledgematerialsWORKINGHOURS:2hours/day*16daysOUTPUT:Proposal,08.1018BASICWORK：1.LearnOFDMA3.LearnICI4.ReadsomepreviousprojectfrominternetaboutthisareaWORKINGHOURS:2hours/day*30daysOUTPUT:Specification,08.11.08BASICWORK:1.BuildupamathematicmodelofthecancellationinOFDMAnetwork2.SimulateitwithMatlabtoachievethetargetthatgettingthebalanceoftheICImitigationandspectralefficiencyWORKINGHOURS:2hours/day*40daysOUTPUT:Mid-termcheckform,09.01.10BASICWORK:1.FinishfinalyearprojectreportWORKINGHOURS:2hours/day*32daysOUTPUT:Finalyearprojectreport,09.04.20BASICWORK:1.GetreadyforthefinalyearprojectpresentationWORKINGHOURS:1hours/day*24daysOUTPUT:Finalyearprojectpresentation,09.0508.1008.1108.1209.0109.0209.0309.0409.05FinalProjectfortheBUPT/QMULJointProgrammeee05b127Page44/27/2009DISCLAIMERThisreportissubmittedaspartrequirementforthedegreeofBSc(Eng)inInter-cellinterferencecancellationinOFDMAnetworkattheUniversityofLondon,andBeijingUniversityofPostsandTelecommunication.Itistheproductofmyownlabourexceptwhereindicatedinthetext.Thereportmaybefreelycopiedanddistributedprovidedthesourceisacknowledged.Signature:Date:FinalProjectfortheBUPT/QMULJointProgrammeee05b127Page54/27/2009摘要关键字：正交频分多址小区间干扰软频率复用OFDMA是无线通讯的基础，是未来的主要发展方向，WIMAX和LTE都是建立在OFDMA的基础上的OFDMA是OFDM的改进，在OFDMA中，信道被分为许多子信道。OFDMA的最大优势就在于用户可以选择传输条件良好的信道来传输数据，并且一组用户可以共用一个传输条件良好的信道。因为OFDMA系统使用频率复用技术，相邻的小区使用同样的频率，这便造成了小区间干扰。如果不同的小区使用不同的频段，则会降低小区间干扰，但是降低了频率的使用率。由于频率资源是非常宝贵有限的，所以我们应该在保证通信质量的前提下尽可能提高频率使用率。最终达到一个优化平衡点就是既把小区间的干扰降低字啊一定水平之内，又提高了频率使用率。这篇论文就是以这个问题为出发点进行研究的。FinalProjectfortheBUPT/QMULJointProgrammeee05b127Page64/27/2009ABSRACT:Keywords:OFDMA(OrthogonalFrequencyDivisionMultiplexAccess)ICI(Inter-ChannelInterference)SFRS(SoftFrequencyReuseScheme)OFDMA(orthogonalfrequencydivisionmultiplexaccess)isthebasicstandardofthewirelesscommunication,isafuturebroadbandwirelessmultipleaccesstechnique.TheWimax,LTEarebothsupportedbyOFDMA.OFDMAistheadvancedanddevelopedtechnologyofOFDM(orthogonalfrequencydivisionmultiplexing).ByusingtheOFDMtodividedthechanneltosub-carriers,andaddthetransmittingdatatopartofthesub-carriers.ThemostpriorsignificantadvantageoftheOFDMAisthattheusercanchoosethesub-channelwithbetterconditiontotransmittingdata.Andagroupofuserscanconnecttheonesub-channelwithbettertransmittingcondition.Theuserhastheselectivitytousethepriorsub-channel.AsOFDMAsystemsusethetechnologyofFrequency-DivisionMultiplexin