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Bernard Sklar《Digital Communication - Fundamentals and Applications》数字通信基础与应用配套讲义教案.doc
PAGE Digital Communications/Sklar Chap. 2Digital Communications/Sklar Chap. 2 PAGE PAGE 6DigitalFundamentals and Applications2nd EditionBernard SklarVol. 1 ( Chapter 1 ~ 5 )ContentsChap.1 Signals and SpectraChap.2 Formatting and Baseband ModulationChap.3 Baseband Demodulation/DetectionChap.4 Bandpass Modulation and Demodulation/DetectionChap.5 Communicatoin Link AnalysisChap.6 Channel Coding: Part IChap.7 Channel Coding: Part IIChap.8 Channel Coding: Part IIIChap.9 Modulation and Coding Trade-OffsChap.10 SynchronizationChap.11 Muliplexing and Multiple AccessChap.12 Spread Spectrum TechniquesChap.13 Source CodingChap.14 Encryption and DecryptionChap.15 Fading Channel DIGITAL COMMUNICATIONSFundamentals and Applications2nd EditionBernard SklarPrentice-Hall International, Inc.CHAPTER1 Signals and SpectraDIGITAL COMMUNICATION SIGNAL PROCESSING Why Digital?RobustPreciseEasy to processReliable 1.1.2 Typical Block Diagram and Transformations Formating: Source Encode/Decode Encrypt/Decrypt Channel Encode/Decode Multiplex/Demultiplex Modulation/Demodulation Bandpass modulation/demodulation Frequency Spread/despreading Multiple Access/ XMT/channel/RCVBaseband for Bluetooth ( Designed by TWT, NCTU) 1.1.3 Basic Digital Communication NomenclatureInformation Source: Analog or discrete or digital.Textual message: A sequence of chatacters.Character: A number of alphabet or symbols.Binary DigitBit streamSymbol: message symbol size, M=2k. Digital WaveformData rate: R=k/T, T: Symbol period.1.1.4 Digital vs. Analog Performance Criteria: SNR vs. Eb/NoCLASSIFICATION OF SIGNALS1.2.1 Deterministic and Random Signals1.2.2 Periodic and Nonperiodic Signal (1.2) 1.2.3 Analog and Discrete Signals 1.2.4 Energy and Power Signals. (1.3a) (1.3b) (1.4) Energy dissipated during specified time interval: (1.5) Average Power: (1.6)Energy for “ Energy signals” (1.7)Power for “ Power signals” (1.8)Signals has finite energy will have
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