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Modeling of Digital Communication Systems Using SIMULINK
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Table of Contents

Preface xiii Acknowledgments xix About the Companion website xxi Abbreviations and Acronyms xxiii 1 Getting Started with Simulink 1 1.1 Introduction 1 1.2 Starting a Matlab Session 2 1.3 Simulink Block Libraries 3 1.4 Building a New Simulink Model 6 1.4.1 Inserting Signal Source and Scope 6 1.4.2 Setting the Source Block Parameters 8 1.4.3 Setting Scope Parameters 9 1.5 Executing the Simulink Model 11 1.6 Reconfiguring the Signal Block 14 1.7 Sample-Based Signals 16 1.8 Sending Data to Workspace 18 1.9 Using Model Explorer 19 1.10 Adding Labels to Figures 21 1.11 Selecting Model Configuration Parameters 22 1.12 Summary Discussion 24 Problems 25 2 Sinusoidal Simulink Model 27 2.1 A First Simulink Model 27 2.2 Simulink Model of Sine Wave 27 2.3 Spectrum of a Sine Wave 32 2.4 Summary Discussion 40 Problems 41 3 Digital Communications BER Performance in AWGN (BPSK and QPSK) 43 3.1 BPSK and QPSK Error Rate Performance in AWGN 43 3.2 Construction of a Simulink Model in Simple Steps 44 3.3 Comparison of Simulated and Theoretical BER 56 3.4 Alternate Simulink Model for BPSK 58 3.5 Frame-Based Simulink Model 62 3.6 QPSK Symbol Error Rate Performance 64 3.7 BPSK Fixed Point Performance 68 3.8 Summary Discussion 73 Appendix 3.A Theoretical BER Performance of BPSK in AWGN 73 Problems 75 4 Digital Communications BER Performance in AWGN (MPSK&QAM) 79 4.1 MPSK and QAM Error Rate Performance in AWGN 79 4.2 MPSK Simulink Model 79 4.3 BER for Other Alphabet Sizes 83 4.4 Fixed Point BER for MPSK 83 4.5 QAM Simulink Model 85 4.6 QAM BER for Other Alphabet Sizes Using Average Power 90 4.7 QAM BER Using Peak Power 90 4.8 Power Amplifier Constraint Using Peak Power Selection with QAM 91 4.9 Summary Discussion 99 Problems 100 5 Digital Communications BER Performance in AWGN (FSK and MSK) 101 5.1 FSK and MSK Error Rate Performance in AWGN 101 5.2 BFSK Simulink Model 101 5.3 MFSK Simulink Model 107 5.4 MSK Simulink Model 108 5.5 MSK Power Spectrum 113 5.6 Summary Discussion 116 Problems 117 6 Digital Communications BER Performance in AWGN (BPSK in Fading) 119 6.1 BPSK in Rayleigh and Rician Fading 119 6.2 BPSK BER Performance in Rayleigh Fading 119 6.3 BPSK BER Performance in Rician Fading 124 6.4 BPSK BER Performance in Rician Fading with Multipath 127 6.5 Summary Discussion 137 Appendix 6.A Theoretical BER Performance of BPSK in Rayleigh Fading 137 Appendix 6.B Theoretical BER Performance of BPSK in Rician Fading 138 Problems 139 7 Digital Communications BER Performance in AWGN (FSK in Fading) 141 7.1 FSK in Rayleigh and Rician Fading 141 7.2 BFSK BER Performance in Rayleigh Fading 141 7.3 MFSK BER Performance in Rayleigh Fading 142 7.4 BFSK BER Performance in Rician Fading 147 7.5 BFSK BER Performance in Rician Fading with Multipath 148 7.6 Summary Discussion 150 Appendix 7.A Theoretical BER Performance of FSK in Rayleigh and Rician Fading 152 Rayleigh Fading 152 Rician Fading 153 Problems 154 8 Digital Communications BER Performance (STBC) 157 8.1 Digital Modulations in Rayleigh Fading with STBC 157 8.2 BPSK BER in Rayleigh Fading with STBC 157 8.3 QAM BER in Rayleigh Fading with STBC 163 8.4 Summary Discussion 163 Appendix 8.A Space-Time Block Coding for BPSK 165 Appendix 8.B Space-Time Block Coding for 16-QAM 167 Problems 169 9 Digital Communications BER Performance in AWGN (Block Coding) 171 9.1 Digital Communications with Block Coding in AWGN 171 9.2 BER Performance of BPSK in AWGN with a Binary BCH Block Code 171 9.3 BER Performance of BPSK in AWGN with a Hamming Code 175 9.4 BER Performance of BPSK in AWGN with a Golay(24,12) Block Code 179 9.5 BER Performance of FSK in AWGN with Reed-Solomon Code 181 9.6 BER Performance of QAM in AWGN with Reed-Solomon Coding 186 9.7 Summary Discussion 190 Problems 192 10 Digital Communications BER Performance in AWGN (Block Coding and Fading) 193 10.1 Digital Communications with Block Coding in Fading 193 10.2 BER Performance of BPSK in Rayleigh Fading with Interleaving and a BCH Block Code 194 10.3 BER Performance of BFSK in Rayleigh Fading with Interleaving and a Golay(24,12) Block Code 195 10.4 BER Performance of 32-FSK in Rayleigh Fading with Interleaving and a Reed-Solomon(31,15) Block Code 201 10.5 BER Performance of 16-QAM in Rayleigh Fading with Interleaving and a Reed-Solomon(15,7) Block Code 204 10.6 BER Performance of 16-QAM in Rayleigh and Rician Fading with Interleaving and a Reed-Solomon(15,7) Block Code 208 10.7 BER Performance of BPSK in Rayleigh Fading with Interleaving and a BCH Block Code and Alamouti STBC 210 10.8 BER Performance of BFSK in Rayleigh Fading with Interleaving and a Golay(24,12) Block Code and Alamouti STBC 215 10.9 BER Performance of 32-FSK in Rayleigh Fading with Interleaving and a Reed-Solomon(31,15) Block Code and Alamouti STBC 218 10.10 BER Performance of 16-QAM in Rayleigh Fading with Interleaving and a Reed-Solomon (15,7) Block Code and Alamouti STBC 219 10.11 Summary Discussion 223 Problems 224 11 Digital Communications BER Performance in AWGN and Fading (Convolutional Coding) 225 11.1 Digital Communications with Convolutional Coding in AWGN and Fading 225 11.2 BER Performance of Convolutional Coding and BPSK in AWGN 226 11.2.1 Hard-Decision Decoding 226 11.2.2 Soft-Decision Decoding 229 11.3 BER Performance of Convolutional Coding and BPSK in AWGN and Rayleigh Fading with Interleaving (Soft- and Hard-Decision Decoding) 233 11.4 BER Performance of Convolutional Coding and BPSK and Alamouti STBC in Rayleigh Fading with Interleaving 239 11.5 Summary Discussion 243 Problems 244 12 Adaptive Equalization in Digital Communications 247 12.1 Adaptive Equalization 247 12.2 BER Performance of BPSK in Dispersive Multipath Channel Using an LMS Linear Equalizer 248 12.3 BER Performance of BPSK in Dispersive Multipath Channel Using an LMS Linear Equalizer From the Simulink Library 257 12.4 BER Performance of QPSK in a channel with ISI Using an LMS Linear Equalizer 258 12.5 BER Performance of BPSK in Dispersive Multipath Channel Using a Decision Feedback Equalizer 268 12.6 BER Performance of BPSK in Rayleigh Fading Multipath Channel Using an RLS Equalizer 273 12.6.1 RLS Equalizer Description 273 12.6.2 RLS Equalization in Rayleigh Fading with No Multipath 275 12.6.3 RLS Equalization in Rayleigh Fading with Multipath 279 12.7 Summary Discussion 280 Problems 283 13 Simulink Examples 285 13.1 Linear Predictive Coding (LPC) for Speech Compression 286 13.1.1 Speech Vocal Tract Model 289 13.1.2 Prediction Coefficients Computation 289 13.1.3 Speech Analysis and Synthesis 289 13.2 RLS Interference Cancellation 291 13.2.1 Sinusoidal Interference 291 13.2.2 Low Pass Filtered Gaussian Noise 296 13.3 Spread Spectrum 298 13.3.1 Spread Spectrum Simulink Model without In-Band Interference 298 13.3.2 Spread Spectrum Simulink Model with In-Band Interference 303 13.3.3 Spread Spectrum Simulink Model with In-Band Interference and Excision 309 13.4 Antenna Nulling 313 13.5 Kalman Filtering 320 13.5.1 Scalar Kalman Filter 322 13.5.2 Kalman Equalizer 328 13.5.3 Radar Tracking Using Extended Kalman Filter (EKF) 339 13.6 Orthogonal Frequency Division Multiplexing 343 13.7 Turbo Coding with BPSK 355 Appendix A Principal Simulink Blocks Used In Chapters 1-13 363 Appendix B Further Reading 369 Index 371

About the Author

Arthur Giordano, PhD, is a consultant in the field ofmilitary and commercial communications specializing in wirelesscommunications. He is a co-founder of G5 Scientific, LLC, is asenior member of the IEEE and has taught graduate communicationscourses. He has developed numerous models usingMathWorks (R) SIMULINK(R) (R) to characterize digitalcommunications systems. Allen Levesque, PhD, is a consultant specializing indigital communications systems, and is a partner in G5 Scientific,LLC. He has taught graduate courses in digital communications atWorcester Polytechnic Institute and is currently a ResearchScientist in WPI s Center for Wireless Information NetworkStudies. Dr. Levesque is an elected Fellow of the IEEE.

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