| PREFACE 1 INTRODUCTION 1. 1 Historical Review 1 1.2 Elements of an Electrical Communication System 1.2.1 Digital Communication System 9 1.2.2 Early Work in Digital Communications 13 1.3 Communication Channels and Their Characteristics 1.4 Mathematical Models for Communication Channels 1.5 Organization of the Book 28 1.6 Further Reading 30 2 ANALOG SIGNAL TRANSMISSION AND RECEPTION 2.1 Introduction to Modulation 32 2.2 Amplitude Modulation （AM） 33 2.2.1 Double-Sideband Suppressed Carrier AM 33 2. 2. 2 Conventional Amplitude Modulation 40 2.2.3 Single-Sideband AM 44 * 2.2.4 Vestigial-Sideband AM 48 2.2.5 Implementation of AM Modulators and Demodulators 52 2.2.6 Signal Multiplexing 58 2.3 Angle Modulation 61 2.3. 1 Representation of FM and PM Signals 62 2.3.2 Spectral Characteristics of Angle-Modulated Signals 66 2.3. 3 Implementation of Angle Modulators and Demodulators 73 2.4 Radio and Television Broadcasting 81 2.4.1 AM Radio Broadcasting 82 2.4. 2 FM Radio Broadcasting 84 2.4.3 Television Broadcasting 87 2.5 Mobile Radio Systems 97 2.6 Further Reading 100 Problems 100 3 EFFECT OF NOISE ON ANALOG COMMUNICATION SYSTEMS 115 3.1 Effect of Noise on Linear-Modulation Systems 115 3.1.1 Effect of Noise on a Baseband System 116 3. 1.2 Effect of Noise on DSB-SC AM 116 3. 1.3 Effect of Noise on SSB AM 118 3.1.4 Effect of Noise on Conventional AM 119 *3.2 Carrier-Phase Estimation with a Phase-Locked Loop （PLL） 124 3.2. 1 The Phase-Locked Loop （ PLL ） 125 3.2.2 Effect of Additive Noise on Phase Estimation 128 3.3 Effect of Noise on Angle Modulation 135 3.3. 1 Threshold Effect in Angle Modulation 145 3.3.2 Pre-emphasis and De-emphasis Filtering 149 3.4 Comparison of Analog-Modulation Systems 153 3.5 Further Reading 154 Problems 155 4 INFORMATION SOURCES AND SOURCE CODING 161 4.1 Modeling of Information Sources 162 4. 1.1 Measure of Information 164 4.1.2 Joint and Conditional Entropy 167 4.2 Source-Coding Theorem 169 4.3 Source-Coding Algorithms 172 4.4 Rate-Distortion Theory 177 4. 4. 1 Mutual Information 178 4. 4. 2 Differential Entropy 179 4.4.3 Rate-Distortion Function 181 4.5 Quantization 187 4.5. 1 Scalar Quantization 188 * 4.5.2 Vector Quantization 198 4.6 Waveform Coding 201 4.6. 1 Pulse-Code Modulation （ PCM） 201 4. 6. 2 Differential Pulse-Code Modulation （ DPCM） 207 4.6. 3 Delta Modulation （AM） 210 4.7 Digital Audio Transmission and Digital Audio Recording 213 4. 7. 1 Digital Audio in Telephone Transmission Systems 214 * 4. 7. 2 Digital Audio Recording 216 4.8 Further Reading 221 Problems 222 5 DIGITAL TRANSMISSION THROUGH THE ADDITIVE WHITE GAUSSIAN NOISE CHANNEL 6 DIGITAL TRANSMISSION THROUGH BANDLIMITED AWGN CHANNELS 7 CHANNEL CAPACITY AND CODING 8 WIRELESS COMMUNICATIONS REFERENCES INDES |
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