基于累量的OFDM信號調(diào)制識別.pdf

1、代號_1QZQl分類號一一一一[峻n學(xué)號一喲璺J刪，密級一姍面普童手辯投六訾碩士學(xué)位論文題(中、英文)目一一基王盡量鰒鯉墅絲信量調(diào)制娜9一一一一一一一一一一一一一一一一一Mo_a_u!atio_nIa_e_a_ti盟cation8asea一一一一一一一一一。一一一一一一一一一一一一一一一一一一onCumulan_ts—for—Q!刪S_ig墮!一一一一一一一一一一一一一一作者姓名一劉獻玲指導(dǎo)教師姓名、職務(wù)陵健一敦攫一學(xué)科門莢工學(xué)一學(xué)科、

2、專業(yè)通信撇系筑一提交論文日期三9Q圭年姐AbstractModulationidentificationforcommunicationsignalsisastillimportantprobleminthecommunicationsignalprocessing，itisrequiredtoidentifythemodulationformatandmodulationparametersinthecomplicatedsignal

3、environmentwithnoise，andtoprovidereferenceforfartheranalysisandprocessingAfteranalyzingthereceivedsignaltheobjectiveofmodulationidentificationistodecidethemodulationformatandestimatethemodulationparametersofthecommunicat

4、ionsignalwithoutanyprioriknowledgeaboutthesi掣lalinformationcontentForthelastseveraldecades，researchersexploredmanymethodstosolvetheproblemofthemodulationidentificationformodulationsignals，especiallythesingleCalTiersignal

5、OVerGaussianchannel，buttheresearchonmulti—carriersisalOVerMIMOchannelandRayleighchannelwasveryrareBasedonthisreasoninterclassandintraclassrecognitionofOFDMsignalovertime—varyingRaylei曲channelandMIMOchannelwhosefadingfact

6、orsfortheantennasareslow—fadingismaderespectivelyFirstlythebasicprincipleofMIMO，OFDMsystemsandmodulationselectionandconvertionofadaptiveOFDMarebrieflyintroducedinthisthesisThenbasingonthispointthebasicprincipleandthealgo

7、rithmofthesignalmodulationidentificationofSTBC—OFDMwerestudiedAtthesametime，theirperformanceswereanalyzedandsimulatedTheusefulresultsweregotThisprovidesprobabilityforthefollowingmaximumlikelihooddecoderFinallyanewalgorit

8、hmofinterclassrecognitionforOFDMsignalOVerRayleighchannelisproposedItisshownbytheresultsthatthealgorithmisstable、^，itllalowcomplexityandithasahi曲correctratetoclassifythemodulationofOFDMsignalTheCorrectClassificationRatei