光OFDM系统的仿真实现

2010年9月第15卷第5期JOURNALOFXIANUNIVERSITYOFPOSTSANDTELECOMMUNICATIONSSept.2010Vol15No5:2010-07-05:(1986-),,,;(1973-),,,;(1962-),,,,OFDM何金池1,梁猛2,巩稼民2(1.西安邮电学院通信与信息工程学院,陕西西安710121;2.西安邮电学院电子工程学院,陕西西安710121):为了提高频谱资源的利用率,缓解因色度色散和偏振模色散引起的符号间干扰,引入一种新的光调制技术通过将正交频分复用技术(OrthogonalFrequencyDivisionMultiplexing,OFDM)应用于光纤通信中,构造出高速率大容量低成本的光传输系统该方法与传统的光通信技术相比,具有更强的系统抗色散能力利用OptiSystem软件构建仿真系统,分析了光正交频分复用(OpticalOrthogonalFrequencyDivisionMultiplexing,OOFDM)技术的抗色散性能根据仿真结果可得出,光正交频分复用技术在高速超长距离的光纤通信中,具有很好的应用前景:光正交频分复用;色散管理;光信噪比;峰均比:TN913.7:A:1007-3264(2010)05-0022-050(OFDM),,,,,,OFDM(AsymmetricDigitalSubscriberLine,ADSL)(WirelessLocalLoop,WLL)(DigitalAudioBroadcasting,DAB)(HighDefinitionTelevision,HDTV),OFDM(OOFDM)OFDM,,OOFDM(ISI),(CP),OOFDM,[1],,OOFDM,,[2],,,OFDM,40Gbit/s[3]OOFDM,,(PAPR)(ASE),1OOFDMOOFDM,,[4](DDOOFDM)[5](COOFDM),COOFDMDDOOFDM,OOFDM1,,,OFDM,OOFDM,PAPR,,OFDM1OOFDMOOFDM:,/N,N,N,,(xQAM)QPSK(IFFT)IFFT,,(ISI),,;,,I/QI/Q90,,,,I/Q,FFT,,xQAM,/,2OOFDMOptiSystemMATLAB,OOFDM,OOFDMOOFDM22O-OFDM!23!第5期何金池,等:光OFDM系统的仿真实现,:,10GBits/s4QAM1024IFFT,512IFFT1/8IEEE802.11a,7.5GHz,I/Q20GHzI/Q3(a)DFB10MHzPIN1A/W,10nA,,16.75ps/nmkm3(b),,PIN,PIN3(c),I/Q1024FFT3(d)3OOFDM,,,[6],,OOFDM,,,QAM,,,I/Q4,,I/Q,,[7]QAM4I/Q,,,,,,4QAM,,!24!西安邮电学院学报2010年9月,,3,OOFDMOOFDM(NRZ),,,OOFDMNRZ10Gb/s,500km,8350ps/ns,,OOFDM(NRZ),5,,NRZ,OOFDM2dB,OFDM,,,,,OOFDM5OFDMNRZOOFDM,,,,(PAPR),PAPR,,,,,,,OOFDM,,Q66Q,,200km,500km1000km6,,,,,,,,PAPR[8],OOFDM,4OOFDM,O-OFDM,,,10-5,1000km,,,,,,OOFDM,[1]J.Armstrong.OFDMforopticalcommunications[J].J.LightwaveTechnol.2009,27(3):189204.[2]B.J.C.Schmidt,A.J.Lowery,andJ.Armstrong.ExperimentaldemonstrationsofelectronicdispersioncompensationforlonghaultransmissionusingdirectdetectionopticalOFDM[J].IEEEJ.LightwaveTechnol.2008,26(1):196203.[3]W.Shieh,Q.Yang,andY.Ma.107Gb/scoherentopticalOFDMtransmissionover1000kmSSMFfiberus!25!第5期何金池,等:光OFDM系统的仿真实现ingorthogonalbandmultiplexing[J].J.OpticalSocietyofAmerica,2008,16(9):63786386.[4]F.Buchali,andR.Dischler.OptimizedsensitivitydirectdetectionOOFDMwithmultilevelsubcarriermodulation[C].EuropeanConferenceonOpticalCommunications,paperOMU5,Brussels,Belgium(2008).[5]W.ShiehandC.Athaudage.Coherentopticalorthogonalfrequencydivisionmultiplexing[J].Electron.Lett.2006(42):587589.[6]W.Shieh,R.S.Tucker,W.Chen,X.Yi,andG.Pendock.OpticalperformancemonitoringincoherentopticalOFDMsystems[J].Opt.Express,2007,15(2):350356.[7]Q.Yang,S.Chen,Y.Ma,andW.Shieh.RealtimereceptionofmultigigabitcoherentopticalOFDMsignals[J].Opt.Express,2009,17(10):79857992.[8]HongchunBaoandWilliamshieh.TransmissionsimulationofcoherentopticalOFDMsignalinWDMsystems[J].OpticalSocietyofAmerica,2007,15(8):44104418.ThesimulationofopticalOFDMsystemHEJinchi1,LIANGMeng2,GONGJiamin2(1.SchoolofCommunicationsandInformationEngineering,XianUniversityofPostsandTelecommunications,Xian710121,China;2.SchoolofElectronicEngineering,XianUniversityofPostsandTelecommunication,Xian710121,China)Abstract:Anewopticalmodulationwasintroduced.Basedontheapplicationoforthogonalfrequencydivisionmultiplexing(OFDM)inopticalfibercommunication,anopticaltransmissionsystemwasconstructed.Comparedwiththetraditionalopticalcommunicationtechnology,thissystemhasthestrongerabilitytoresistdispersionofopticalfiber.WiththeOptiSystemsoftware,asimulationwasdonetoanalyzetheresisteddispersionperformanceoftheopticalorthogonalfrequencydivisionmultiplexing(OOFDM)technique,andtheresultsshowthatOOFDMhastheverygoodapplicationprospectsforultralonghaulandthehighspeedopticfibercommunications.Keywords:OOFDM;dispersionmanagement;OSNR;PAPR(上接第21页)DesignforactiveopticalnetworkbasedonSDHYANGYi,LIANGYuting,JIAChunyang(SchoolofElectronicEngineering,XianUniversityofPostsandTelecommunications,Xian710121,China)Abstract:AprojectofaccesssolutionofactiveopticalnetworkisconstructedbasedonSDH,equipment,protocolconvertersandtelephoneterminals.BysimplifyingthefunctionsandconfiguringthenetworkmanagementsystemoftheSDHequipments,theIPtransmissionandvoicecommunicationhavebeenachieved.ThesystemwhichcompletesbidirectionalvoicecommunicationandimagetransmissioncanreduceequipmentscomplexityandresourcewastewhenSDHisusedintheaccessnetwork.Keywords:passiveopticalnetwork(PON);activeopticalnetwork(AON);synchronousdigitalhierarchy(SDH)!26!西安邮电学院学报2010年9月