Designed to help teach and understand communication systems using a classroom-tested, active learning approach.

* Discusses communication concepts and algorithms, which are explained using simulation projects, accompanied by MATLAB and Simulink

* Provides step-by-step code exercises and instructions to implement execution sequences

* Includes a companion website that has MATLAB and Simulink model samples and templates (password: matlab)

Kwonhue Choi is a Professor in the Department of Information and Communication Engineering and the Principal Director of Broadband Wireless Communication (BWC) Laboratory at Yeungnam University, Korea. His research areas include efficient multiple access, diversity schemes, and cooperative communications for Fifth-Generation (5G) and beyond systems. He is the inventor of FADAC-OFDM and PSW (Properly scrambled Walsh) codes.

Huaping Liu is a Professor with the School of Electrical Engineering and Computer Science at Oregon State University, USA. He was formerly a cellular network radio frequency systems engineer specializing on modeling, simulating, optimizing, and testing various digital communication systems. Dr. Liu received his PhD in Electrical Engineering at New Jersey Institute of Technology, USA.

Preface xiii

Acknowledgments xvii

Notation and List of Symbols xix

List of Acronyms xxi

Content-Mapping Table with Major Existing Textbooks xxiii

Lab Class Assignment Guide xxv

About the Companion Website xxvii

1 MATLAB and Simulink Basics 1

1.1 Operating on Variables and Plotting Graphs in MATLAB 1

1.2 Using Symbolic Math 3

1.3 Creating and Using a Script File (m-File) 4

1.4 ^[A]User-Defined MATLAB Function 7

1.5 Designing a Simple Simulink File 8

1.6 Creating a Subsystem Block 12

2 Numerical Integration and Orthogonal Expansion 16

2.1 Simple Numerical Integration 16

2.2 Orthogonal Expansion 18

References 23

3 Fourier Series and Frequency Transfer Function 24

3.1 Designing the Extended Fourier Series System 24

3.2 Frequency Transfer Function of Linear Systems 25

3.3 Verification of the Frequency Transfer Function of Linear Systems in Simulink 27

3.4 Steady-State Response of a Linear Filter to a Periodic Input Signal 29

References 31

4 Fourier Transform 33

4.1 The Spectrum of Sinusoidal Signals 33

4.2 The Spectrum of Any General Periodic Functions 36

4.3 Analysis and Test of the Spectra of Periodic Functions 37

4.4 Spectrum of a Nonperiodic Audio Signal 40

References 44

5 Convolution 45

5.1 Sampled Time-Limited Functions 45

5.2 Time-Domain View of Convolution 48

5.3 Convolution with the Impulse Function 50

5.4 Frequency-Domain View of Convolution 51

Reference 54

6 Low Pass Filter and Band Pass Filter Design 55

6.1 ^[T]Analysis of the Spectrum of Sample Audio Signals 55

6.2 Low Pass Filter Design 57

6.3 LPF Operation 61

6.4 ^[A]Band Pass Filter Design 63

Reference 65

7 Sampling and Reconstruction 66

7.1 Customizing the Analog Filter Design Block to Design an LPF 66

7.2 Storing and Playing Sound Data 67

7.3 Sampling and Signal Reconstruction Systems 68

7.4 Frequency Up-Conversion without Resorting to Mixing with a Sinusoid 75

References 77

8 Correlation and Spectral Density 78

8.1 Generation of Pulse Signals 78

8.2 Correlation Function 79

8.3 Energy Spectral Density 87

References 89

9 Amplitude Modulation 90

9.1 Modulation and Demodulation of Double Sideband-Suppressed Carrier Signals 90

9.2 Effects of the Local Carrier Phase and Frequency Errors on Demodulation Performance 95

9.3 ^[A]Design of an AM Transmitter and Receiver without Using an Oscillator to Generate the Sinusoidal Signal 98

Reference 100

10 Quadrature Multiplexing and Frequency Division Multiplexing 101

10.1 Quadrature Multiplexing and Frequency Division Multiplexing Signals and Their Spectra 101

10.2 Demodulator Design 104

10.3 Effects of Phase and Frequency Errors in QM Systems 105

Reference 108

11 Hilbert Transform, Analytic Signal, and SSB Modulation 109

11.1 Hilbert Transform, Analytic Signal, and Single-Side Band Modulation 109

11.2 Generation of Analytic Signals Using the Hilbert Transform 111

11.3 Generation and Spectra of Analytic and Single-Side Band Modulated Signals 114

11.4 Implementation of an SSB Modulation and Demodulation System Using a Band Pass Filter 117

References 122

12 Voltage-Controlled Oscillator and Frequency Modulation 123

12.1 ^[A]Impact of Signal Clipping in Amplitude Modulation Systems 123

12.2 Operation of the Voltage-Controlled Oscillator and Its Use in an FM Transmitter 126

12.3 Implementation of Narrowband FM 130