5G通信系统中massive MIMO-FBMC技术的结合概述.doc

massiveMIMOFBMC技术综述摘要为了应对第五代移动通信(5G)中更高数据率与更低时延得需求,大规模MIMO(massivemultipleinputmultipleoutput)技术已经被提出并被广泛研究。大规模MIMO技术能大幅度地提升多用户网络得容量。而在5G中得带宽研究方面,特别就是针对碎片频谱与频谱灵活性问题,现有得正交频分多址(OrthogonalFrequencyDivisionMultiplexing,OFDM)技术不可能应对未来得挑战,新得波形方案需要被设计出来。基于此,FBMC(filterbankmulticarrier)技术由于具有比OFDM低得多得带外频谱泄露而被受到重视,并已被标准推进组IMT2020列为5G物理层得主要备选方案之一。本文首先回顾了5G中波形设计方案(主要就是FBMC调制)与大规模多天线系统(即massiveMIMO)得现有工作与主要挑战。然后,简要介绍了基于MassiveMIMO得FBMC系统中得自均衡性质,该性质可以用于减少系统所需得子载波数目。同时,FBMC中得盲信道跟踪性质可以用于消除massiveMIMO系统中得导频污染问题。尽管如此,如何将FBMC技术应用于massiveMIMO系统中得误码率、计算复杂度、线性需求等方面仍然不明确,未来更多得研究工作需要在massiveMIMOFBMC方面展开来。关键词:大规模MIMO;FBMC;自均衡;导频污染;盲均衡AbstractInordertoaddresstherequirementsofhigherdataratesandlowerlatencyinthefifthgenerationmobilemunicationsystems(5G),massivemultipleinputmultipleoutput(MIMO)hasbeenproposedandiscurrentlyanactiveareaofresearch、works、Inthequestforbandwidth,particularchallengesthatneedtobeaddressedinthecontextof5Garefragmentedspectrumandspectrumagility、ItisunlikelythatthesechallengescanbesatisfiedusingOrthogonalFrequencyDivisionMultiplexing(OFDM),andnewwaveformsarerequired、Thefilterbankmulticarrier(FBMC)techniquehasbeenlistedbyIMT2020asoneofthekeyphysicallayercandidatesin5G,sincetheFBMChasmuchloweroutofbandradiationthantheOFDM、Thisarticlereviewsexistingrelatedworkandidentifiesthemainchallengesinthekey5Gareaattheintersectionofwaveformdesign(especiallyforFBMC)andlargescalemultipleantennasystems,alsoknownasMassiveMIMO、ThepropertyofselfequalizationisthenintroducedforFBMCbasedMassiveMIMO,whichcanreducethenumberofsubcarriersrequiredbythesystem、anbeusedtoaddresspilotcontaminationoneofthemainlimitingfactorsofMassiveMIMOsystems、Nevertheless,theimplicationsofFBMConerrorrateperformance,putationalplexity,andlinearityrequirementsinlargescaleMIMOsystemswithpotentiallyhundredsofantennasatthebasestationarestillunclear、MoreresearchworkscorrespondtothemassiveMIMOFBMCsystemareneededinthefuture、KeyWords:massiveMIMO;FBMC;selfequalization;pilotcontamination;blindequalization目录摘要 IAbstract II1引言 12技术