多跳中繼網(wǎng)絡(luò)虛擬MIMO上行配對策略研究.pdf

1、西南交通大學(xué)碩士學(xué)位論文多跳中繼網(wǎng)絡(luò)虛擬MIMO上行配對策略研究姓名：陳清申請學(xué)位級別：碩士專業(yè)：通信與信息系統(tǒng)指導(dǎo)教師：方旭明20100501西南交通大學(xué)碩士研究生學(xué)位論文第1I頁AbstractWiththerapiddevelopmentandthewidelyapplicationofwirelesscommunicationthedesireforuserstolargelyimprovethetransmissionrate

2、ofwirelesscommunicationisgettingmuchstrongerthaneverbeforeMultipleInputandMultipleOutput(MIMO)technologycanbreakthroughthetraditionalcapacitylimitsofwirelesscommunicationsystemsThespectrumefficiencycallbegreatlyimprovedb

3、ysettingmultipleantennaswithoutincreasingtherequiredbandwidthandtransmittingpowerHoweveritisnoteasytodesignmultipleantennasinauserequipment(UE)，whichlimitsitsapplicationintheuplinktransmissionInthevirtualMIMO(VMIMO)conce

4、pt，multiplesingle—antennaUEscallbegroupedtogethertotransmitsignalsatthesametime／frequencyresourcestoimprovetheuplinksystemcapacityTherefore，itattractsthemostattentionByallocatingeachUSeroneoragroupofsubcarrierstorealizem

5、ultipleaccessscheme，OrthogonalFrequencyDivisionMultipleAccess(OFDMA)isthemosteffectivewaytealizemultiusermultiplexingandaccessinOrthogonalFrequencyDivisionMultiplexing(OFDM)systemsThecombinationoftheadvantagesofVMIMOandO

6、FDMAtechniqueissuitableforthehiglldataratetransmissionforthenextwirelesscommunicationsystemsFuturecommunicationnetworksnotonlyprovidegreatersystemcapacitybutalsoensuretheneedsofhi曲speedandwidecoverageTheintroductionofrel

7、aystation(RS)technologytothecurrentcellularsystem，canimprovethecelledgeusers’QoS，reducethenetworkinvestmentandoperationcostAnditalsoplaysallimportantroleinenhancingthesystemcoverageTherefore，theobjectiveofthisthesisistoi

8、nvestigatetheUSerpairingschedulingalgorithmsforVMIMOsystemandconsideritsextendingapplicationsinmultihoprelaynetworksInthisthesis，theprinciplesofVMIMOOFDMAareintroducedfirstlyandthenthemethodstoresearchradiesourcemanageme

9、nt，especiallytheUSerpairingalgorithmsareinvestigatedindetailsThesimulationplatformforVMIMOOFDMAsystemisbuiltupThenseveraltypicaluserpairingalgorithmsinsinglehop，suchasrandompairingalgorithm，orthogonalpairingalgorithm，det

10、erminantpairingalgorithmandadjustabledeterminantpairingalgorithmareinvestigatedandsimulatedtocomparethealgorithms’performanceConsideringthetraditionalpairingalgorithmswhichCan’tachievethetradeoffbetweenpairedusers’nearfa

11、reffectandsystemthroughput，weproposeanovelpairingschedulingschemebasedontheSNRthresholdcombinedwimtheproportionalfairschedulingschemeSimulationresultsshowthattheproposedschemeimprovesthesystemcapacitywithoutreducingtheQo