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1、摘要第四章研究分析了信道信息不完整情况下的基于空间距离和基于信号空间维度算法的波束赋形矩阵设计，以及对能量效率的影响。第五章总结全文，简述下一步研究工作。关键词：多用户MIMO，波束赋形，广播信道，能量效率，功率分配IIAbstractABSTRACTAlongwiththerapiddevelopmentofwirelessmobilecommunicationtechnology,
reliableandefficientmobilecommunicationbecomesmoreandmoresignificantto
humanbeings.Limitedspectrum
2、resources,energyresourcesplacerestrictionsonthe
appealofcommunication;thereforeconstantlyimprovingspectrumefficiencyand
energyefficiencybecomeevenmoreimminency.Beamformingplaysanimportantrole
inimprovingthecapacityofMIMOwirelesscommunicationsystems,suppressing
interference,thusimprovingthespe
3、ctralefficiencyofthesystem.Now,thetechnology
hasbeenwritteninto3GPPprotocol.Withnecessarysignal-processingofthetransmittingantennaandreceiving
antenna,beamformingalgorithmcanimproveSINRandsuppressinterference.
Beamformingtechnologycanalsobeseenasthetransmissionsignalspatialfiltering.
Multiply
4、ingtransmittingsignalsfromleftbyatransmittingbeaformingmatrix,and
multiplyingreceivingsignalsfromleftbyanotherreceivingbeaformingmatrix,the
desiredsignalpowerofreceivingsidecanbeenhancedwhileinterferencesignalpower
beingsuppressed.Afterdesigningthebeamformingmatrix,howtoconducta
reasonableand
5、effectiveallocationofpowerisalsooneofthekeytechnologiesto
enhancetheefficiencyofthesystemfrequencyandenergyefficiency.Ontheonehand,
improvingthepowerofthetransmissionsignal,caneffectivelyimprovethesystem
capacityandthetransmitsignalpower,buttoacertainextent,thespectralefficiency
andtheenergye
6、fficiencymaynotbeincreasedasthepowerenhancement.Onthe
otherhand,inthespiritofenergysavingideas,systempowermustbecontrolled.
Combiningbeamformingtechnology,forthepurposeofimprovingenergy
efficiency,researchingontherationaldesignofpowerdistributionsub-covariance
matrixisworthtoanalysis.Inthedes
7、ignofthereceiverbeamformingmatrixandthe
transmitterbeamformingmatrix,thecompletechannelinformationonitsperformance
hasanextremelyimportantrole.However,inpracticalcommunicationsystems,taking
acompletechannelinformationisdifficult,andthereforeh
