一种降低OFDM信号峰均比的自适应冗余序列方法-豆柴文库

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一种降低OFDM信号峰均比的自适应冗余序列方法
Title:AdaptiveRedundancySequenceMethodforReducingPeak-to-AveragePowerRatioofOFDMSignals
Abstract:
OrthogonalFrequencyDivisionMultiplexing(OFDM)hasgainedpopularityinmodernwirelesscommunicationsystemsduetoitshighdatarateandspectralefficiency.However,itiswellknownthatOFDMsignalssufferfromhighPeak-to-AveragePowerRatio(PAPR),whichposessignificantchallengesintransmissionsystems.ThispaperproposesanAdaptiveRedundancySequence(ARS)methodtomitigatethePAPRprobleminOFDMsignals.TheARSmethoddynamicallyadjuststheredundancyaddedtotheOFDMsignalbasedonitscharacteristics,therebyreducingthePAPRandachievingbettersignalquality.
1.Introduction:
OFDMisapopularmodulationtechniqueusedinvariouswirelesscommunicationstandardssuchasWi-Fi,LTE,and5G.Itdividesthewidebandchannelintomultiplenarrowbandsubcarriers,whicharemodulatedwithdatasymbols.However,OFDMsignalsexperiencehighPAPR,whichleadstoincreasedpowerconsumptionandreducedefficiencyofpoweramplifiers.TheARSmethodaimstoaddressthisissuebyintelligentlyaddingredundancytotheOFDMsignalinordertoreducethePAPR.
2.OFDMSignalCharacteristics:
ThissectiondiscussesthecharacteristicsofOFDMsignals,includingtheunderlyingmathematicsandthefactorscontributingtohighPAPR.TherelationshipbetweenthenumberofsubcarriersandthePAPRisanalyzed,highlightingtheneedforadaptivemethodstoreducePAPR.
3.RedundancySequenceDesign:
IntheARSmethod,aspecificsequenceisaddedtotheOFDMsignal,whichincreasestheredundancy.ThedesignofthisredundancysequenceiscrucialtoachievingeffectivePAPRreduction.Severaltechniques,suchasHermitiansymmetryandIFFTprocessing,areexploredtogeneratetheredundancysequence.
4.AdaptiveRedundancyControl:
ThecoreaspectoftheARSmethodliesinitsabilitytodynamicallyadjusttheredundancyaddedtotheOFDMsignal.Thissectionelaboratesonthealgorithmusedtodeterminetheoptimumredundancylevelbasedonthesignalstatistics,suchasthemomentofinertiaandhigherorderstatistics.Additionally,machinelearningandartificialintelligencetechniquescanbeincorporatedtofurtherenhancetheadaptiv