Many textbooks today treat the basic topics in analog and digital communication systems, including coding and decoding algorithms and modulation and demodulation techniques. The focus of most of these textbooks is by necessity on the theory that underlies the design and performance analysis of the various building blocks, e.g., coders, decoders, modulators, and demodulators, that constitute the basic elements of a communication system. Relatively few of the textbooks, especially those written for undergraduates, include applications that motivate students.

...

The Brooks/Cole BookWare CompanionTM Series promotes problem solving and critical thinking by using MATLAB as a "virtual laboratory" The books in this series encourage active learning and

Provide powerful software tools to support course activities

Demonstrate clear, step-by-step techniques for solving relevant problems

Challenge readers to understand and apply these techniques on their own

The BookWare Companion Series spans the Electrical Engineering curriculum and includesnationally and world-renowned authors.

1 Signals and Linear Systems 1

1.1 Preview 1

1.2 Fourier Series 1

   1.2.1 Periodic Signals and LTI Systems 13

1.3 Fourier Transforms 18

   1.3.1 Sampling Theorem 23

   1.3.2 Frequency-Domain Analysis of LTI Systems 28

1.4 Power and Energy 32

1.5 Lowpass Equivalent of Bandpass Signals 36

2 Random Processes 45

2.1 Preview 45

2.2 Generation of Random Variables 45

2.3 Gaussian and Gauss-Markov Processes 50

2.4 Power Spectrum of Random Processes and White Processes 57

2.5 Linear Filtering of Random Processes 62

2.6 Lowpass and Bandpass Processes 68

2.7 Monte Carlo Simulation of Digital Communication Systems 74

3 Analog Modulation 81

3.1 Preview 81

3.2 Amplitude Modulation (AM) 81

   3.2.1 DSB-AM 82

   3.2.2 Conventional AM 91

   3.2.3 SSB-AM 98

3.3 Demodulation of AM Signals 103

   3.3.1 DSB-AM Demodulation 103

   3.3.2 SSB-AM Demodulation 109

   3.3.3 Conventional AM Demodulation 114

3.4 Angle Modulation 119

4 Analog-to-Digital Conversion 132

4.1 Preview 132

4.2 Measure of Information 132

   4.2.1 Noiseless Coding 133

4.3 Quantization 138

   4.3.1 Scalar Quantization 139

   4.3.2 Vector Quantization 148

   4.3.3 Pulse-Code Modulation 155

   4.3.4 Uniform PCM 155

5 Baseband Digital Transmission 173

5.1 Preview 173

5.2 Binary Signal Transmission 173

 5.2.1 Optimum Receiver for the AWGN Channel 174

 5.2.2 Other Binary Signal Transmission Methods 184

 5.2.3 Signal Constellation Diagrams for Binary Signals 193

5.3 Multiamplitude Signal Transmission 194

 5.3.1 Signal Waveforms with Four Amplitude Levels 194

 5.3.2 Optimum Receiver for the AWGN Channel 197

 5.3.3 Signal Waveforms with Multiple Amplitude Levels 203

5.4 Multidimensional Signals 206

 5.4.1 Multidimensional Orthogonal Signals 207

 5.4.2 Biorgthogonal Signals 216

6 Digital Transmission Through Bandlimited Channels 226

6.1 Preview 226

6.2 The Power Spectrum of a Digital PAM Signal 226

6.3 Characterization of Bandlimited Channels and Channel Distortion 231

6.4 Characterization of Intersymbol Interference 240

6.5 Communication System Design for Bandlimited Channels 247

 6.5.1 Signal Design for Zero ISI 247

 6.5.2 Signal Design for Controlled IS1 252

 6.5.3 Precoding for Detection of Partial Response Signals 257

6.6 Linear Equalizers 260

 6.6.1 Adaptive Linear Equalizers 268

6.7 Nonlinear Equalizers 273

7 Digital Transmission via Carrier Modulation 281

7.1 Preview 281

7.2 Carrier-Amplitude Modulation 281

 7.2.1 Demodulation of PAM Signals 284

7.3 Carrier-Phase Modulation 287

 7.3.1 Phase Demodulation and Detection 290

 7.3.2 Differential Phase Modulation and Demodulation 296

7.4 Quadrature Amplitude Modulation 303

 7.4.1 Demodulation and Detection of QAM 304

 7.4.2 Probability of Error for QAM in an AWGN Channel 306

7.5 Carrier-Frequency Modulation 311

 7.5.1 Frequency-Shift Keying 311

 7.5.2 Demodulation and Detection of FSK Signals 313

 7.5.3 Probability of Error for Noncoherent Detection of FSK 318

7.6 Multicarrier Modulation and OFDM 322

7.7 Synchronization in Communication Systems 328

 7.7.1 Carrier Synchronization 328

 7.7.2 Clock Synchronization 334

8 Channel Capacity and Coding 344

8.1 Preview 344

8.2 Channel Model and Channel Capacity 344

 8.2.1 Channel Model 345

 8.2.2 Channel Capacity 345

8.3 Channel Coding 356

    8.3.1 Linear Block Codes 358

    8.3.2 Convolutional Codes 372

9 Spread Spectrum Communication Systems 391

9.1 Preview 391

9.2 Direct-Sequence Spread Spectrum Systems 392

    9.2.1 Signal Demodulation 394

    9.2.2 Probability of Error 396

   9.2.3 Two Applications of DS Spread Spectrum Signals 397

9.3 Generation of PN Sequences 403

9.4 Frequency-Hopped Spread Spectrum 409

    9.4.1 Probability of Error for FH Signals 410

   9.4.2 Use of Signal Diversity to Overcome Partial-Band Interference 415

10 Simulink Tutorial on Digital Modulation Methods 422

10.1 Preview 422

10.2 Short Introduction to Simulink 423

    10.2.1 Example: BPSK Transmission 423

10.3 Start the Tutorial 430

10.4 Pulse Shaping 431

    10.4.1 Theory 432

    10.4.2 Experiments 437

10.5 Binary Phase-Shift Keying (BPSK) 443

    10.5.1 Binary Phase Shift Keying with NRZ Rectangular Pulses 445

    10.5.2 Binary Phase Shift Keying with Raised-Cosine Pulses 451

    10.5.3 Binary Phase Shift Keying with Square-Root Raised-Cosine Pulses 454

10.6 Quadrature Phase-Shift Keying (QPSK) 457

    10.6.1 Quadrature Phase-Shift Keying with Square-Root Raised-Cosine Pulses 457

    10.6.2 Phase and Frequency Offset 461

10.70ffset-QPSK 466

    10.7.1 Theory 466

    10.7.2 Experiments 467

10.8 Minimum Shift Keying (MSK) 471

    10.8.1 Theory 471

    10.8.2 Experiments 471

10.9 16-ary QuadratureAmplitude-Shift Keying (16-QAM) 477

    10.9.1 16-QAM with Square-Root Raised-Cosine Pulses 477

    10.9.2 16-QAM with Raised-Cosine Pulses 481

Bibliography 485

Index 486