通信系统中语音信号的MATLAB仿真

20092:2008-12-30:(19842),,,,::167424578(2009)0220049202MATLAB,,(,550025):,MATLAB/SIMULINK,,,,:;;;;:TN911:A0,,,MATLABMathWorks,MATLABSIMULINK,MATLABSIMULINK,A/D():,,,11SIMULINK1/,,,SampledQuantizerEncode(),,nV,V(i)(i=1,2,,n)y0n+1,:(1)-xV(1),y=0;(2)V(m)xV(m+1),1mn-1,y=m;(3)V(n)x+,y=nn+1C,C(n+1),y0,C(1);C(n+1)m,m+1C(m+1),,,,,,A,-11256,0255,01:[(-1+1/255)2/255(1-1/255)],[-12/2551]222,,,,,,,,,,(),,,,0(),,,:;,(),13:poly2trellis(9,[557663711])4/6Puncture(),624,4,,InsertZero()(0),46,2,,,,3(BPSK/QPSK/OQPSK)PSK,01,0MATLABBPSK(),sinwtcoswt,PSK,QPSK,OQPSK(),,,(),(-5dB),ErrorRateCalculation()BPSKQPSK1OQPSK2,BPSKQPSK0OQPSK153BPSK:,QPSKOQPSKBPSK1,QPSKBPSK30,OQPSKBPSK1.6,,4OQPSK,BPSKQPSK,:,,,1,[(-1+1/255)2/255/(1-1/255)]254,[(-12/2551)],255poly2trellis(9,[557663711]),13,Puncture()InsertZero(),[110110][110110],,,(IntegertoBitConverter),(ToFrame),,,65,,,,BPSKQPSKOQPSKMATLAB/SIMULINK,,,MATLAB,(81)052009[1]:--2006--,2006.[2].[J].,2005.ISBN:7503012838,2005.[3],,,.[J].,2001,15(2):16-18.[4].[OL/DB].(KunmingUniversityofScienceandTechology,KunmingYunnan650051,Chian)Abstract:ThisresearchreckonsthedistributingchangeofDianLakepollutionwiththeusingofempiricalmodelandlinearspectralmixinganalysis.Itisbasedonwavefactorreckontogetthecharacterwavefactor(PRWI),andtogetthemixedinfor2mationofwaterandresidentareawithstrengthenedgraph.Thepaperusestheanalysismethodofeye2sightjudgeandquantitystatisticstoevaluatetheresultsoastogetthewaterpollutionstatuepictureindifferenttime.Theresultofresearchshowsthatitcanbecommonlyusedfortheextractingapplicationonanalysisofwaterpollutionchangingininteriorlake.Keywords:RSwaterstatute;waterpollutionchanginganalysis;mixedopticalspectrallineddisintegratemodel;DianLake(50)6[1]JefferyA.Wepman,Analog2to2digitalConvertersandThe2irApplicationsinRadioReceivers[J].IEEECommu2nicationsMagazine,1995(5).[2]MitolaJ.TheChallengesintheGlobalizationofSoft2wareRadio[J].IEEECommunicationsMagazine,1999(5).[3],.Matlab[J].,2001,11(197).[4],.Matlab(2)[M].:,2006.[5],,.[J].,2007(4).SpeechSignalinCommunicationSystemBaseonMtalabSimulationZhouYong,ZhangDa2min,WangXu(SchoolofElectronicScience&InformationTechnology,GuizhouUniversity,GuiyangGuizhou550025,China)Abstract:Basedonaspeechsignalprocessingsystem,theMatlab/Simulinkisusedforvisualmodelinganddynamicsimula2tionofthesystem.Themainprocessofcommunicationissampling,quantifying,coding,modulation,theaddingofreducedconvolutioncodewithinterlacing,suchaserrorcontrol,andthemaincharacteristicsofseveralmodulationsaregiven.Thearti2cleanalyzesthemodelestablishmentandparametersettingsoastoprovidereferencesandgroundforthepracticalsystem.Keywords:simulation;communicationsystem;digitalmodulation;quantizationencoder;puncturedconvolutioncodes182: