td-lte系统的无线资源调度算法的研究

《td-lte系统的无线资源调度算法的研究》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、Ⅵ厂IRELEERESOURCESCH匝DU吼INGALGoRj删INTD．mSYSTEMAbstractInordertomaintainthecompetitioninthewirelesscommunicationfield，meetthechallengeofthewidebandaccesstechniquesandthenewservices。3GPPstartedthestandardizationofLongTermEvolution(LTE)in2004．LTEcansupportboththeFDDandTDDmodes．Inourcoun

2、try,TD．IJEisadoptedasthelongtermevolutionofTD．SCDMA．ThefeaturesofTD-LTEsystem，suchasusingtimeandfrequencyasresourceblocksforallocation，andflexibleconfigurationoftheuplinkanddownlinktimeslots．makeitsresourceschedulingratherdifferentfromthatofthetraditionalwirelesscommunicationsystem．

3、EspeciallywhenMIMO(Multiple—InputMultiple·Out—put)techniquewasintroducedtoincreasethepeakrate(uplink50Mb／sanddownlink1OOMb／s)，theconeeptofResourcesPoolhasbeenexpanded，SOresourceschedulingbecomesmorecomplicatedwithjointprocessingofthetime，frequencyandspacedomain．Firstly,weintroduceth

4、echaracteristicsofTD．LTEsystem．classicresourceschedulingalgorithmsandalsothebasicprinciples，functionsandmodulesoftheTD．LTESystemlevelsimulationplatform．ThenwediscusstheCQIfeedbackmodelandMCSselectionprocedureintheTD．IJEdownlinksystemwithsingle．antennaconfiguration．Fortherestrictiono

5、nresourceschedulingwithsingleantennaconfiguration，weproposesaCommonMCSselectionalgorithm——3．stepsMCSselectionalgorithm．Simulationresultsshowthatthe3-stepsMCSselectionprocedurecaneffectivelysolvetherestrictiononMCSselection，andthebest-Mreportingschemecanmakeagoodtradeoffbetweentheupl

6、inkoverheadanddownlinkthroughput．AndalSOwefindthatBestMschemeIIcanmakebetterperformanceinhighspeedSCenanO．Finally,weintroducethemulti-antennamodelandanalyzetheperformanceoftheresourceschedulingalgorithmforthemulti—antennabaseddownlinkTD—LTEsystem．Simulationresultsshowthatmulti—anten

7、natechniquecalleffectivelyimprovethesystemspectrumefficiency,andtherankadaptivealgorithmcanimprovethethroughputofedgeusersattheindoorhotspotandthemacroscenarioswhilemaintainingtheperformanceofthewholesystem．KEYWORDS：TD—LTE，wirelessresource，schedulingalgorithm，performanceevaluation目录

8、第1章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯