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Informationen zum Autor 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. Klappentext 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. 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. Inhaltsverzeichnis 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 Baseb...
