一种鲁棒的LTE-A系统中下行多用户MIMO技术及UE级的SINR补偿机制（英文）-豆柴文库

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一种鲁棒的LTE-A系统中下行多用户MIMO技术及UE级的SINR补偿机制（英文）
Abstract
Withthedevelopmentofmobilecommunicationtechnology,LongTermEvolutionAdvanced(LTE-A)hasemergedasahighlyefficientwirelesscommunicationsystem.InatypicalLTE-Asystem,multipleantennasareemployedatboththebasestation(BS)andtheuserequipment(UE)tosupportmultiple-inputandmultiple-output(MIMO)technology.However,inthepresenceofmultipleusersandchannels,thesignal-to-interference-plus-noiseratio(SINR)canbeaffectedbyvariousfactors,suchaschannelfadingandinterferencefromotherusers.
Toaddressthesechallenges,thispaperproposesarobustLTE-Asystemthatincorporatesadownlinkmulti-userMIMOtechniquecombinedwithaUE-levelSINRcompensationmechanism.TheproposedsystemisdesignedtoenhancetheSINRperformanceoftheUEandimprovethespectrumefficiencyoftheoverallsystem.
Theproposedsystemcomprisestwokeycomponents.Thefirstcomponentisanoveldownlinkmulti-userMIMOalgorithm,whichcombinesaconventionallinearfilterwithauserselectionscheme.Thelinearfilterisdesignedtominimizetheinterferencecausedbyotherusers,whiletheuserselectionschemechoosestheuserwiththehighestchannelqualitytoreducetheimpactofchannelfading.
ThesecondcomponentistheUE-levelSINRcompensationmechanism.ThismechanismisdesignedtocompensatefortheSINRdegradationcausedbyvariousfactorssuchaschannelfadingandinterference.Specifically,theUEmeasuresitsownSINRandtransmitsitbacktotheBS,whichthenusesthisinformationtoadjustthetransmitpowerandmodulationschemeinreal-timetoachievethedesiredSINRlevels.
SimulationresultsshowthattheproposedsystemimprovestheaverageUESINRbyupto5dBcomparedwithconventionalLTE-Asystems.Furthermore,theproposedsystemachievesahighercell-edgethroughputandoverallsystemspectralefficiencycomparedtothebaselinesystem.
Overall,theproposedsystemprovidesarobustsolutionforimprovingtheSINRperformanceoftheUEandimprovingthesystemspectralefficiencyinamulti-userLTE-Aenvironment.
Keywords:LongTermEvolutionAdvanced(LTE-A),multiple-inputandmultiple-output(MIMO),signal-to-interference-plus-noiseratio(SINR),userequipment(UE