[eBook] Digital Communication: Design for the Real World

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书名：Digital Communication: Design for the Real World
作者：Andy Bateman
年份：1999
格式：html
目录：
How to Use and Preface
How to use the combined book and CD
Preface

Chapter 1: Background material
  1.1 Time/frequency representation of digital signals
    Fourier series
    Fourier series (cont.)
    The frequency domain
    Spectrum of a periodic pulse train
    Spectrum of a data pulse
    Spectrum of a baseband binary data stream
    Factors affecting signal bandwidth
    Factors affecting signal bandwidth (cont.)
    The Fourier transform
  1.2 Trigonometric relationships
    The basic mixing process
    The basic mixing process (cont.2)
    The basic mixing process (cont.3)
    Complex mixing processes
    The vector modulator
  1.3 Communications networks and signalling protocols
    What is a network?
    A typical network configuration
    Network hierarchy
    Transmission standards
    Integrated Services Digital Network (ISDN)
    What is a protocol?
    The seven-layer OSI model
    Network types: circuit and packet switched network operation
    Network management
    Network link layer
    Synchronous/asynchronous communications
    Synchronous transmission
    Asynchronous transmission
    ASCII character format
    Advantages and disadvantages of synchronous data communications
  1.4 Definition of terms
    Characteristics of message type
    Analogue
    Digital
    Elements of a communications link
    Transmitter
    Transmission channel
    Receiver
    Sources of link degradation
    Distortion
    Interference
    Noise
    Transmission protocols
    Simplex
    Half duplex
    Full duplex
    Unipolar vs bipolar waveforms
   
Chapter 2: Data transmission fundamentals
  2.1 Factors affecting system design
    Technological limitations: Hardware and software availability
    Technological limitations: Power consumption and Component size
    Government regulations and standards
    Commercial realities
  2.2 Data transmission fundamentals
    How quickly can information flow?
    Methods of communication
    Binary signalling
    Multi-level signalling
    Multi-level symbol operation
    The bandwidth and noise trade-off
    Information transfer rate
    Symbol rate (baud rate)
    Bandwidth efficiency
  2.3 Multi-level signalling (M-ary signalling)
    The relationship between bits and symbols
    Example: 8-ary signalling
    Advantages and disadvantages of M-art signalling
  2.4 Calculation of channel capacity
    Limitation due to finite bandwidth
    Limitation due to finite bandwidth (cont.)
    Minimum transmission bandwidth
    Channel capacity restriction due to noise - the Shannon-Hartley theorem
    Channel capacity restriction due to noise - the Shannon-Hartley theorem (cont.)
    Power and bandwidth efficiency
    Graphical representation
   
Chapter 3: Baseband data transmission
  3.1 Introduction
   
  3.2 Intersymbol interference (ISI)
    The problem of intersymbol interference
    Pulse shaping for zero ISI: Nyquist channel filtering
    Pulse shaping for zero ISI: Nyquist channel filtering (cont.)
    Achieving a Nyquist channel response
    Nyquist filtering - example: cellular radio application
  3.3 Eye diagrams
    Generation of eye diagrams
    Diagnosis using the eye diagram
    Example of complex eye diagram
  3.4 Raised cosine filtering
    Raised cosine filter family
    Impulse response of raised cosine filter
    Eye diagrams for raised cosine filtered data
    The root raised cosine filter
    Implementation of digital Nyquist filters
    Care with eye diagrams
    Symbol timing recovery
    Symbol timing circuits
    Symbol timing circuits (cont.)
    Summary: choice of a
  3.5 Matched filtering
    Recovery of symbols from noise
    Recovery of symbols from noise (cont.)
    The concept of an optimum (matched) filter
    Designing a matched filter with ISI in mind
    Bit error rate (BER) performance for baseband data systems
    BER performance for matched filter detection
    BER performance for matched filter detection (cont.)
    Unipolar vs bipolar symbols
    BER performance for M-ary signalling
    Bit error rate vs symbol error rate
    Gray coding
  3.6 Partial response signalling
    Duo-binary signalling
    Duo-binary signalling (cont.)
    Modified duo-binary signalling
   
Chapter 4: Sources and examples of channel degradation
  4.1 Introduction
   
  4.2 Gain, phase and group delay distortion
    Gain distortion - filters
    Gain distortion - amplifiers
    Gain distortion - the channel
    Phase distortion - filters
    Group delay - filters
    Phase distortion - amplifiers
    Phase distortion - the channel
    Frequency errors
    Local oscillator error
    Doppler shift
  4.3 Interference and noise
    Sources of interference
    Dealing with interference
    Sources of noise
    Thermal noise
    Shot, flicker and atmospheric noise
    Characteristics of noise
  4.4 The telephone channel
    AC-coupled channels
    NRZ vs Manchester encoding
    Bandwidth efficiency of encoded data
    Data encoding and the telephone channel
  4.5 The wireless channel
    Unguided propagation
    Multipath distortion
    Multipath fading
    Frequency flat vs frequency selective fading
    Multipath fading - the time domain problem
    Coping with multipath fading
    Reference sounding
    Parallel transmission
    Spectral spreading
    Channel equalizers
    Directional antenna
    Predicting multipath distortion
    How propagation changes with operating frequency
   
Chapter 5: Bandpass digital modulation
  5.1 Introduction
   
  5.2 Amplitude shift keying (ASK)
    What is ASK?
    Symmetry in ASK
    Spectral occupancy of ASK: ASK data spectrum
    Generation of ASK modulated signals
    Bandwidth limited ASK
    Bandpass filtering method
    Baseband filtering method
    Non-coherent detection
    Coherent detection
    Coherent detection vs non-coherent detection
    Coherent detection vs non-coherent detection
    Carrier recovery for ASK
    Matched filtering for ASK
    Symbol timing recovery
    BER performance of ASK
    Constellation diagrams
  5.3 Frequency shift keying (FSK)
    FSK waveforms
    FSK generation
    The vector modulator
    Spectrum of FSK
    Spectrum of CPFSK
    Filtered FSK
    Non-coherent FSK detection
    Non-coherent PLL-based FSK detection
    Coherent FSK detection
    BER performance for FSK
    Advantages and disadvantages of FSK
  5.4 Phase shift keying (PSK)
    Principle of PSK
    Spectral occupancy for PSK
    PSK generation
    The effect of filtering on the PSK waveform
    Detection of PSK
    Carrier recovery of coherent PSK
    Carrier recovery of coherent PSK
    The Costas loop
    Phase ambiguity in PSK carrier recovery
    Differential data encoding
    Differential data decoding
    Differential PSK (DPSK)
    Symbol timing recovery for PSK
    Constellation diagram for PSK
    BER performance for PSK
  5.5 Comparison of binary modulation schemes
    Relative BER performance
    Equal average symbol energy
    Equal peak symbol energy
   
Chapter 6: Multi-level digital modulation
  6.1 Introduction
   
  6.2 M-ary amplitude shift keying (M-ary ASK)
    Implementation of M-ary ASK
    Performance of M-ary ASK
  6.3 M-ary frequency shift keying (M-ary FSK)
    M-ary FSK application
    Orthogonal signalling
    Properties of orthogonal symbols
    Orthogonal FSK detection
    BER performance for M-ary orthogonal FSK
  6.4 M-ary phase shift keying (M-ary PSK)
    Quadrature phase shift keying (QPSK)
    Implementation of QPSK - modulator
    Implementation of QPSK - demodulator
    Bit error performance of QPSK
    Symbol error performance of QPSK
    Differential QPSK (DQPSK)
    BER performance of DQPSK
    p/4 QPSK
    Offset QPSK (OQPSK)
    Spectrum of M-ary PSK
    Performance of M-ary PSK
  6.5 Combined amplitude and phase keying
    Introduction
    QAM generation
    QAM detection
    M-ary QAM vs M-ary PSK
    BER performance for QAM
    M-ary Amplitude and Phase Keying (M-ary APK)
    Gray coding
  6.6 Relative performance of multi-level bandpass modulation formats
    Symbol error curves for M-ary formats
    The Shannon limit - how close can we get?
    Table of CCITT telephone modem characteristics
   
Chapter 7: Coding theory and practice
  7.1 Source coding
    Introduction
    Waveform coding - A./D converters
    Nyquist sampling
    Nyquist sampling theorem - aliasing
    Dynamic range
    Quantization noise
    Companding
    Voice coding
    Voice coding (cont.)
    Intelligent source coding
  7.2 Channel coding
    Introduction
    Types of ARQ operation
    Parity
    Parity (cont.)
    Types of FEC coding
  7.3 Block coding
    Basics of block coding
    Block coding analogy
    Coding efficiency
    Hamming codes - an example of a block code
    Hamming distance
    BER performance for a (7,4) Hamming code
    Higher order Hamming codes
    Implementation complexity
  7.4 Advanced block coding
    Block code families
    Interleaving
    Implementation
    Reed-Solomon (RS) codes
  7.5 Convolutional coding
    Introduction
    Soft decision coding
    Trellis diagrams
    Soft vs hard decision decoding
  7.6 Combined coding and modulation
    Introduction
    Trellis coded modulation (TCM)
    Practical issues with TCM
    TCM and the Shannon limit
    Source, channel and modulation coding - complete
   
Chapter 8: Multi-user digital modulation techniques
  8.1 Introduction
   
  8.2 Frequency division multiple access (FDMA)
    Basic system operation
    Wireless FDMA operation
    Power control in wireless FDMA systems
    Advantages of FDMA
    Disadvantages of FDMA
    Wavelength division multiplexing
  8.3 Time division multiple access (TDMA)
    Basic system operation
    TDMA in a wireless environment
    Example of a TDMA system
    Example of a TDMA system (cont.)
    Advantages of TDMA operation
    Disadvantages of TDMA operation
  8.4 Code division multiple access (CDMA)
    CDMA systems
    Frequency hopped CDMA (FH-CDMA)
    Example of frequency hopped CDMA
    Direct sequence CDMA
    Direct sequence CDMA (cont.)
    Example of direct sequence CDMA
    Example of direct sequence CDMA (cont.)
    Advantages of CDMA
    Disadvantages of CDMA
  8.5 Combined multiple access systems
    Examples of FDMA/TDMA combinations
    Examples of FDMA/CDMA and FDMA/FDMA combinations

Glossary

References

Index

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