基于systemview的真人原声am通信系统的传输实现

:2005-01-1513220056JournalofBeijingInstituteofPetro-chemicalTechnologyVol.13No.2==============================================Jun.2005SystemViewAM(,102617),。AM,SystemViewWindows,,。。,。AM;SystemView;;TN919,、。SystemView,,[1]。,,,System-View,。1AM[2],(AM)。。s(t)=Acos(ωct+φc),A,ωc,φc。,sm(t)=Am(t)cos(ωct+φc),m(t)。m(t),m0m'(t)。,m0m(t),m'(t)。,m0&’m'(t)’max,sm(t)=(m0+m'(t))cos(ωct+φc)sm(t)=m0cos(ωct+φc)+m'(t)cos(ωct+φc)SM(ω)=m0[δ(ω-ωc)+δ(ω+ωc]+12[M'(ω-ωc)+M'(ω+ωc)]。,M'(ω)(m'(t)。,,。,,ωbφb,。r(t)=sm(t)+n(t),r(t),n(t)。,r(t)cos(ωbt+φb)。ωc=ωb,φc=φb,[sm(t)+n(t)]·cos(ωbt+φb)12[m0+m'(t)]+12[m0+m'(t)]cos(2ωct+2φc)+n(t)cos(ωt+φc)。,,,。,,,,。1。))))m0+m'(t)*))))))LPF*))ncos(ωct+φc+,,)*)))+n(t+,,)*)))ncos(ωbt+φb+,,)*)))))))LPFm0+m'(t)+n(t*)))))))))1AM2AM1AM。,AM,,,System-View。SystemView,。SystemView,,,,。1LPF,。1“n”,,。1“+”,。2AMSystemView1SystemView,,2。3AM2,1。,14,2,4,5,7,815,12。,13WAV[3],11.025kHz,MyVoice.wav。,。12WAV,。,33.075kHz,Nyquist,66.15kHz,6。5,。21。10,6Amp=1V,Freq=33.075kHz,Phase=0deg13Source:MyVoice.wav,AudioRate=11.025kHz,Pad=5Samples12Source:Voice.wav,AudioRate=66.15kHz1,151:Gain=1,15:Gain=28,148:IIR,Fc=5kHz,14:IIR,Fc=5kHz5GaussNoise,Mean=0V,StdDev=0.01V9,10,11Analysis,66.15kHz,MyVoice.wav8.99s,0s8.99s,。4,13WAVMyVoice.wav12WAVVoice.wav,,,1s,3,41200513MyVoice.wav,Voice.wav。33,MyVoice.wavAMVoice.wav,,。,。,,。VoiceTransmissionThroughAMCommunicationSystemBasedonSystemViewSoftwareEnvironmentTianXiaopingWangTieWeiHuili(DepartmentofAutomation,BeijingInstituteofPetro-chemicalTechnology,Beijing102617)AbstractGeneralsimulationsoftwareonlyintroducestheoriesandseldomprovidesexperienceforusers.Inthispaper,SystemViewsoftwareisusedtosimulatetherealvoicecollectedbyMi-crosoftsoftwarebasedontheunderstandingofAMcommunicationsystem.Thismethodwillhelpthestudentstoimprovetheirunderstandingandstudyinginitiativeofcommunicationsystem.Therealizationoftransmissionindicatesthatcompletecommunicationsystemcanberealizedu-singsoftware.KeywordsAM;systemView;simulation;samplingrate,,,:。5SystemView,AM,,,。,。1.SystemViewiMj.m,20012.iMj.m,20013kl.iMj.m,1995512.SystemViewAM