Mehmet Safak

Digital Communications (eBook, ePUB)

• Format: ePub

Produktbeschreibung

This is a modern textbook on digital communications and is designed for senior undergraduate and graduate students, whilst also providing a valuable reference for those working in the telecommunications industry. It provides a simple and thorough access to a wide range of topics through use of figures, tables, examples and problem sets. The author provides an integrated approach between RF engineering and statistical theory of communications. Intuitive explanations of the theoretical and practical aspects of telecommunications help the reader to acquire a deeper understanding of the topics. The book covers the fundamentals of antennas, channel modelling, receiver system noise, A/D conversion of signals, PCM, baseband transmission, optimum receiver, modulation techniques, error control coding, OFDM, fading channels, diversity and combining techniques, MIMO systems and cooperative communications. It will be an essential reference for all students and practitioners in the electrical engineering field.

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Produktdetails

• Verlag: John Wiley & Sons
• Seitenzahl: 912
• Erscheinungstermin: 17. Januar 2017
• Englisch
• ISBN-13: 9781119091271
• Artikelnr.: 47511880

Autorenporträt

Professor Mehmet Safak, Hacettepe University, Ankara, Turkey. Professor Safak achieved his PhD on the topic of Antennas, and he taught electromagnetic theory and antennas before joining NATO in the Hague, Netherlands, where he worked on military satellite communications. Following this wide and multi-disciplined exposure, Safak returned to academia and taught courses in digital communications. He is currently a member of the CONASENSE Foundation which studies visionary projects in Communications, Navigation, Sensors and Services. Teaching and supervising remain his priority, however, and this book is the result of many years' lecture work, plus the most recent research outcomes.

Inhaltsangabe

Preface xiv List of Abbreviations xviii About the Companion Website xxi 1 Signal Analysis 1 1.1 Relationship Between Time and Frequency Characteristics of Signals 2 1.2 Power Spectal Density (PSD) and Energy Spectral Density (ESD) 15 1.3 Random Signals 18 1.4 Signal Transmission Through Linear Systems 27 References 31 Problems 31 2 Antennas 33 2.1 Hertz Dipole 34 2.2 Linear Dipole Antenna 40 2.3 Aperture Antennas 43 2.4 Isotropic and Omnidirectional Antennas 47 2.5 Antenna Parameters 48 References 78 Problems 78 3 Channel Modeling 82 3.1 Wave Propagation in Low- and Medium-Frequency Bands (Surface Waves) 83 3.2 Wave Propagation in the HF Band (Sky Waves) 84 3.3 Wave Propagation in VHF and UHF Bands 85 3.4 Wave Propagation in SHF and EHF Bands 106 3.5 Tropospheric Refraction 118 3.6 Outdoor Path-Loss Models 123 3.7 Indoor Propagation Models 129 3.8 Propagation in Vegetation 134 References 137 Problems 137 4 Receiver System Noise 145 4.1 Thermal Noise 146 4.2 Equivalent Noise Temperature 147 4.3 Noise Figure 150 4.4 External Noise and Antenna Noise Temperature 153 4.5 System Noise Temperature 167 4.6 Additive White Gaussian Noise Channel 174 References 175 Problems 175 5 Pulse Modulation 184 5.1 Analog-to-Digital Conversion 185 5.2 Time-Division Multiplexing 209 5.3 Pulse-Code Modulation (PCM) Systems 212 5.4 Differential Quantization Techniques 220 References 236 Problems 236 6 Baseband Transmission 245 6.1 The Channel 245 6.2 Matched Filter 249 6.3 Baseband M-ary PAM Transmission 263 6.4 Intersymbol Interference 268 6.5 Nyquist Criterion for Distortionless Baseband Binary Transmission In a ISI Channel 272 6.6 Correlative-Level Coding (Partial-Response Signalling) 278 6.7 Equalization in Digital Transmission Systems 283 References 287 Problems 287 7 Optimum Receiver in AWGN Channel 298 7.1 Introduction 298 7.2 Geometric Representation of Signals 300 7.3 Coherent Demodulation in AWGN Channels 302 7.4 Probability of Error 311 References 319 Problems 319 8 Passband Modulation Techniques 323 8.1 PSD of Passband Signals 324 8.2 Synchronization 327 8.3 Coherently Detected Passband Modulations 332 8.4 Noncoherently Detected Passband Modulations 367 8.5 Comparison of Modulation Techniques 374 References 378 Problems 379 9 Error Control Coding 386 9.1 Introduction to Channel Coding 386 9.2 Maximum Likelihood Decoding (MLD) with Hard and Soft Decisions 390 9.3 Linear Block Codes 396 9.4 Cyclic Codes 415 9.5 Burst Error Correction 429 9.6 Convolutional Coding 436 9.7 Concatenated Coding 454 9.8 Turbo Codes 456 9.9 Automatic Repeat-Request (ARQ) 459 Appendix 9A Shannon Limit For Hard-Decision and Soft-Decision Decoding 471 References 473 Problems 473 10 Broadband Transmission Techniques 479 10.1 Spread Spectrum 481 10.2 Orthogonal Frequency Division Multiplexing (OFDM) 519 Appendix 10A Frequency Domain Analysis of DSSS Signals 545 Appendix 10B Time Domain Analysis of DSSS Signals 547 Appendix 10C SIR in OFDM systems 548 References 551 Problems 552 11 Fading Channels 557 11.1 Introduction 558 11.2 Characterisation of Multipath Fading Channels 559 11.3 Modeling Fading and Shadowing 582 11.4 Bit Error Probability in Frequency-Nonselective Slowly Fading Channels 604 11.5 Frequency-Selective Slowly-Fading Channels 614 11.6 Resource Allocation in Fading Channels 622 References 626 Problems 626 12 Diversity and Combining Techniques 638 12.1 Antenna Arrays in Non-Fading Channels 640 12.2 Antenna Arrays in Fading Channels 650 12.3 Correlation Effects in Fading Channels 654 12.4 Diversity Order, Diversity Gain and Array Gain 657 12.5 Ergodic and Outage Capacity in Fading Channels 660 12.6 Diversity and Combining 664 References 691 Problems 692 13 MIMO Systems 701 13.1 Channel Classification 702 13.2 MIMO Channels with Arbitrary Number of Transmit and Receive Antennas 703 13.3 Eigenvalues of the Random Wishart Matrix HHH 707 13.4 A 2 × 2 MIMO Channel 718 13.5 Diversity Order of a MIMO System 722 13.6 Capacity of a MIMO System 723 13.7 MIMO Beamforming Systems 730 13.8 Transmit Antenna Selection (TAS) in MIMO Systems 734 13.9 Parasitic MIMO Systems 740 13.10 MIMO Systems with Polarization Diversity 748 References 753 Problems 755 14 Cooperative Communications 758 14.1 Dual-Hop Amplify-and-Forward Relaying 759 14.2 Relay Selection in Dual-Hop Relaying 767 14.3 Source and Destination with Multiple Antennas in Dual-Hop AF Relaying 776 14.4 Dual-Hop Detect-and-Forward Relaying 787 14.5 Relaying with Multiple Antennas at Source, Relay and Destination 796 14.6 Coded Cooperation 798 Appendix 14A CDF of
eq and
eq,0 800 Appendix 14B Average Capacity of
eq,0 801 Appendix 14C Rayleigh Approximation for Equivalent SNR with Relay Selection 802 Appendix 14D CDF of
eq,a 804 References 806 Problems 807 Appendix A: Vector Calculus in Spherical Coordinates 810 Appendix B: Gaussian Q Function 811 Appendix C: Fourier Transforms 819 Appendix D: Mathematical Tools 821 Appendix E: The Wishart Distribution 834 Appendix F: Probability and Random Variables 844 Index 871