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1、實用文案AbstractNowadays,thereisatrendforcommunicationsystemthatthewholenetworksystemisbecomingdynamicsothattherearealwayshavingdevicesshouldbeembeddedandremoved.Conventionalwiredcommunication,duetothecomplexityofcabling,doesnotadapttothemoderncommunicationsystem.Wirelesstechniquehasbeenusedwid
2、elybecausedevicescanbeconnectedbyelectromagnetismwavewithoutcabling.However,lowtransmittingreliablitybecauseofinter-interferencebetweenelectromagnetismwavesisthekeyproblemofwirelesscommunication.Basedonthis,thisthesisinvestigatesoneofthetechniquecalledcooperativecommunicationanditcooperativ
3、eprotocols.Cooperativecommunicationisavirtualmultiple-inputmultiple-output(MIMO)system.Toincreasethereliabilityofsignaltransmittedwithoutincreasingtheamountofcommunicationdevices,thistechnologytriestomakeeachantennashaveoneormorepartnersthatassistthemtotransmitthesignal.Inwirelessnetwork,th
4、edevicesnotonlytransmittheirownsignalbutalsoassisttheir“partner”totransmittheirsignalforsavingthecostofinstallationofadditionalantennasatbothreceiverandsenderInthisthesis,wefocusonintroducingthreemainprotocolsincooperativecommunication:Amplify-and–Forward(AF),Decode-and-Forward(DF)andCodedC
5、ooperation(CC).TheperformanceandmathematicalequationsofAFandDFareanalysed,andthenMATLABprogramswerecreatedtosimulatetheperformanceofthesetwoprotocols.標準文檔實用文案Aboutthethreeprotocols,themainproceduresarealsointroduced.TheperformancecomparisonforAFandDFindifferentsignal-to-noise(SNR)aredemonst
6、rated.TheresultpresentsthattheDFprotocolshasbetterperformancethanAF.Finally,somerecommendationsandfutureworkarementionedattheendofthethesis.標準文檔實用文案TableofContentsAbstractTableofcontainsListoffiguresListofabbreviationsandSymbols1Introduction..................................................
7、................................................................................91.1Background.......................................................................................................................91.2Objectives...........................
