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ID:32736138
大小:1.95 MB
页数:55页
时间:2019-02-15
《ofdma系统自适应无线资源管理的cpn建模与仿真分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、AbstractⅥ,irelesscommunicationsystemappearedonehundredyearsago.Nowithasbecomeanimportantpartinpeople’Sdailylifeandscientificresearchfield.Inthelatestgenerationofwirelesscommunicationsystemof4GOFDMA(OrthogonalFrequencyDivisionMultipleAccess)whichreceive
2、dwidespreadattentionlSaveryimportanttechnology.Researchesshowthat,OFDMAtechnologycarleffectivelyimprovetheaccessrateofwirelesscommunicationsystem.OFDMAsystemcanreducesIm玎owbandinterferenceandsymbolsinterferencecausedbymultipathspreadeffectively.RRM(Rad
3、ioResourceManagement)Callimprovecapacityandcontrolpowerinwirelesscommunicationnetworksystem.Toachievethehigherdatatransferrateandspectrumefficiency,RRMtechnologyistheonlywaytomaketheuseofradioresourceeffectivelyinOFDMAsystem.Inrecentyears,tobuildtheact
4、ualoperationmodelandanalysistheperformanceofatealsystem,simulationhasbecomeakindofeffectivemeasures.CPN(ColoredPetriNets)modelingtechnologyiswidelyusedinmodelingandperformanceanalysisofdifferentkindsoflargecomplicatedsystem.TherearealotofadvantagesofCP
5、Nmodelingtechnology.Ithashighvisualityandoperationspeed.Thesystemmodelisconvenienttomodifytoo.Atpresent,thestudyofCPNmodelingontheRRMoftheadaptiveOFDMAsystemismainlyaimedatadmissioncontrolpart.Therese铀.chIlasbeenverifiedthatCPNmodelisisomorphicwiththeM
6、arkovmodelinstatespace.CPNhaveprominentadvantagestoovercomemanyexistingproblemsfstarespaceexplosion,etc.)ofSPN(StochasticPetriNet).However,thismodelonlyconsideredthetargettomaximizethecapacityofthesystem.Anditislackofresearchingonthepowercontrolanddist
7、ributionofthesystem.Thispaperfh'stlyuseCPNtobuildaadaptiveRRMmodeloftheOFDMAsysten:Lthismodelisbasedonthetargetofminimizingthetotalemissionpowerofthewholesystem.ItmodelsthecalladmissioncontrolandresourcedistributionpartsoftheOFDMAsystem.Inthissystemmod
8、el,thetargettominimizethetotalpowerIIIAbstractofthesystem(MAoptimizationalgorithm)isachievedbytheMLprogramminglanguage.ThisCPNmodelusesthehierarchicalmodelingmethod.Eachpartofthesystemisestablishedofsubnet.Then,ajointoptimizationadaptiv
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