bernard sklar《digital communication - fundamentals and applications》数字通信基础与应用配套讲义教案

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1、DigitalCommunications/SklarChap.2DigitalFundamentalsandApplications2ndEditionBernardSklarVol.1(Chapter1~5)44DigitalCommunications/SklarChap.2ContentsChap.1SignalsandSpectraChap.2FormattingandBasebandModulationChap.3BasebandDemodulation/DetectionChap.4BandpassModulationandDemodulation/D

2、etectionChap.5CommunicatoinLinkAnalysisChap.6ChannelCoding:PartIChap.7ChannelCoding:PartIIChap.8ChannelCoding:PartIIIChap.9ModulationandCodingTrade-OffsChap.10SynchronizationChap.11MuliplexingandMultipleAccessChap.12SpreadSpectrumTechniquesChap.13SourceCodingChap.14EncryptionandDecrypt

3、ionChap.15FadingChannel44DigitalCommunications/SklarChap.2DIGITALCOMMUNICATIONSFundamentalsandApplications2ndEditionBernardSklarPrentice-HallInternational,Inc.CHAPTER1SignalsandSpectra1.1DIGITALCOMMUNICATIONSIGNALPROCESSING1.1.1.1WhyDigital?RobustPreciseEasytoprocessReliable44DigitalCo

4、mmunications/SklarChap.21.1.2TypicalBlockDiagramandTransformations44DigitalCommunications/SklarChap.2Formating:SourceEncode/DecodeEncrypt/DecryptChannelEncode/DecodeMultiplex/DemultiplexModulation/DemodulationBandpassmodulation/demodulationFrequencySpread/despreadingMultipleAccess/XMT/

5、channel/RCVBasebandforBluetooth(DesignedbyTWT,NCTU)44DigitalCommunications/SklarChap.244DigitalCommunications/SklarChap.21.1.3BasicDigitalCommunicationNomenclaturenInformationSource:Analogordiscreteordigital.nTextualmessage:Asequenceofchatacters.nCharacter:Anumberofalphabetorsymbols.nB

6、inaryDigitnBitstreamnSymbol:messagesymbolsize,M=2k.nDigitalWaveformnDatarate:R=k/T,T:Symbolperiod.44DigitalCommunications/SklarChap.21.1.4Digitalvs.AnalogPerformanceCriteria:SNRvs.Eb/No1.1CLASSIFICATIONOFSIGNALS1.2.1DeterministicandRandomSignals1.2.2PeriodicandNonperiodicSignal(1.2)1.2

7、.3AnalogandDiscreteSignals1.2.4EnergyandPowerSignals.(1.3a)(1.3b)(1.4)Energydissipatedduringspecifiedtimeinterval:(1.5)AveragePower:(1.6)44DigitalCommunications/SklarChap.2Energyfor“Energysignals”(1.7)Powerfor“Powersignals”(1.8)ØSignalshasfiniteenergywillhavezeroaveragepowersuchasper