协同通信系统无线资源分配的研究

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1、ABSTRACTABSTRACTWiththerapiddevelopmentofcomputer,Internetandwirelesscommunicationtechnologyandtherequirementofwirelesstransmissionrateandqualityofservice,peoplehopetogetaccesstosmoothlydataserviceanywhereatanytime.However,theexistingcellularmobilenetworkcannotsupportthiskindofapplicationsmoothly,w

2、hichbootstheevolutionofwirelessnetwork.Itisnecessarytoimprovethedatatransmissionrateandothepropertybyadoptingnewtechnologyandnewnetworkstructure.MultipleInputandMultipleOutput(MIMO)technologyhasimprovetheperformanceofovercomingmulti-pathfading.Butitisnotpracticaltoaddmorethanoneantennatomobiledevic

3、eduetoitssizelimit.However,cooperativecommunicationtechnologycanformavirtualMIMOthroughantennasharingbetweenneighborhoodandovercometheshortcomingofMIMO,whichhasdrawnmuchattentionofbothdomesticandforeignacademiccircles.Thekeypointoffullyrealizingthebenefitsofcooperativecommunicationishowtoallocation

4、thewirelessresourcesefficiently.Thewirelessresourceincludessubcarrier,powerandrelaynodes.Resourceallocationalgorithmdecides“whomtocooperate”,“howtomakesub-carrierpairs”and“howtocooperate”.Inthispaper,wemainlyfocusonthehalf-duplexfixedAFcooperativesystemandstudytheproblemof“whomtocooperatewith”、“how

5、tocooperate”andpowerallocation.Firstly,weintroducetheexactdefinitionofcooperativecommunication,analyzetheoutageprobabilityandchannelcapacityofAFandDFprotocol.Then,asurveyofrelayselectionschemeispresented.AnimprovedmultiplerelayselectionschemefordistributednetworkbasedonSINRthreshold(STMRS)ispropose

6、d.Furthermore,westudytheproblemofdynamicsub-carrierpairingandpowerallocationalgorithm.Ajointoptimaldynamicpairingandoptimalpowerallocationalgorithm(OPOPA)isproposed.Computersimulationhasprovedthattheproposedalgorithmcaneffetelyimproveend-to-endtransmissionratecomparedwithothersimilaralgorithms.Keyw

7、ords:CooperativeCommunication,OFDM，RelaySelection,Subcarrierpairing，PowerAllocationII万方数据目录目录第一章绪论........................................................11.1引言..............................................