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1、AbstractNowadays,thereisatrendforcommunicationsystemthatthewholenetworksystemisbecomingdynamicsothattherearealwayshavingdevicesshouldbeembeddedandremoved.Conventionalwiredcommunication,duetothecomplexityofcabling,doesnotadapttothemoderncommunicationsystem.Wirelesstechniquehasbeenused
2、widelybecausedevicescanbeconnectedbyelectromagnetismwavewithoutcabling.However,lowtransmittingreliablitybecauseofinter-interferencebetweenelectromagnetismwavesisthekeyproblemofwirelesscommunication.Basedonthis,thisthesisinvestigatesoneofthetechniquecalledcooperativecommunicationandit
3、cooperativeprotocols.Cooperativecommunicationisavirtualmultiple-inputmultiple-output(MIMO)system.Toincreasethereliabilityofsignaltransmittedwithoutincreasingtheamountofcommunicationdevices,thistechnologytriestomakeeachantennashaveoneormorepartnersthatassistthemtotransmitthesignal.Inw
4、irelessnetwork,thedevicesnotonlytransmittheirownsignalbutalsoassisttheir“partner”totransmittheirsignalforsavingthecostofinstallationofadditionalantennasatbothreceiverandsenderInthisthesis,wefocusonintroducingthreemainprotocolsincooperativecommunication:Amplify-and–Forward(AF),Decode-
5、and-Forward(DF)andCodedCooperation(CC).TheperformanceandmathematicalequationsofAFandDFareanalysed,andthenMATLABprogramswerecreatedtosimulatetheperformanceofthesetwoprotocols.Aboutthethreeprotocols,themainproceduresarealsointroduced.TheperformancecomparisonforAFandDFindifferentsignal-
6、to-noise(SNR)aredemonstrated.TheresultpresentsthattheDFprotocolshasbetterperformancethanAF.Finally,somerecommendationsandfutureworkarementionedattheendofthethesis..TableofContentsAbstractTableofcontainsListoffiguresListofabbreviationsandSymbols1Introduction...........................
7、.......................................................................................................91.1Background.......................................................................................................................91.2Objectives..................................
8、............
