分布式空时编码系统中的资源分配技术

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1、AbstractAbstractCooperativecommunicationtechnologyisproposedtotaketheadvantageofmulti-antennasconsideringthesizeandpowerlimitationofthemobileunits.Distributedspacetimecoding,thecombinationofspacetimecodingandvirtualMIMOsystemsconsistingofmultiplesingle-antennamobilenodes,has

2、attractedmanyattentionsofresearchersduetoitstransmissionperformanceimprovementandthespatialdiversitygain.Weinvestigatetheresourceallocationtechnologyforcooperativecommunicationsystemwithamplifyandforwarddistributedspace-timecoding(AF-DSTC).Specifically,powerallocation,relays

3、electionandantennaselectionareinvestigated.Maincontributionsofthisthesisare:1)ASER-minimizationbasedpowerallocationalgorithmisproposedunderthepowerconstraint.Moreover,theclosed-formsolutionoftheoptimaltwo-stagepowerallocationisderived.Simulationresultsshowthattheperformancec

4、anbeimprovedgreatlywhentherelayisclosetoresourcenodeordestinationnode.2)Weproposearelayselectionalgorithmbasedontheoptimalrelaydistance,inordertoovercomethelowtransmissionefficiencyinreal-timerelayselectionschemesandthehighcomputationalcomplexityintraditionalfixedrelayselect

5、ionschemes.Theproposedalgorithmcanreducethecomplexityoftherelayselection.3)Thetransmitterantennaselectionalgorithmsareproposedforsingleanddoublerelaysystem,respectively.Thetheoreticalanalysesorthediversityorderofthesinglerelaysystemandthebiterrorrateofthedoublerelaysystemare

6、given.Simulationresultsdemonstratethattheproposedsinglerelayselectionalgorithmcanachieveafulldiversityorder.Comparedwiththeconventionalantennaselectionalgorithms,thedoublerelayselectionalgorithmcanachieveagoodtradeoffbetweenthecomplexity,thetransmissionefficiencyandtheperfor

7、mance.Keywords:CooperativeCommunicationDistributedSpace-timeCodingPowerAllocationRelaySelectionAntennaSelection目录目录第一章绪论.....................................................................................................................11.1研究背景..............................

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