Chapter 1 Introduction
1.1 Elements and Limitations of Communication Systems
Information,Messages,and Signals
Elements of a Communication System
Fundamental Limitations
1.2 Modulation and Coding
Modulation Methods
Modulation Benefits and Applications
Coding Methods and Benefits
1.3 Electromagnetic Wave Propagation Over Wireless Channels
RF Wave Deflection
Skywave Propagation
1.4 Emerging Developments
1.5 Societal Impact and Historical Perspective
Historical Perspective
1.6 Prospectus
Chapter 2 Signals and Spectra
2.1 Line Spectra and Fourier Series
Phasors and Line Spectra
Periodic Signals and Average Power
Fourier Series
Convergence Conditions and Gibbs Phenomenon
Parseval's Power Theorem
2.2 Fourier Transforms and Continuous Spectra（2.1）
Fourier Transforms
Symmetric and Causal Signals
Rayleigh's Energy Theorem
Duality Theorem
Transform Calculations
2.3 Time and Frequency Relations （2.2）
Superposition
Time Delay and Scale Change
Frequency Translation and Modulation s
Differentiation and Integration
2.4 Convolution（2.3）
Convolution Integral
Convolution Theorems
2.5 Impulses and Transforms in the Limit（2.4）
Properties of the Unit Impulse
Impulses in Frequency
Step and Signum Functions
Impulses in Time
2.6 Discrete Time Signals and the Discrete Fourier Transform
Convolution Using the DFT（2.4）
Chapter 3 Signal Transmission and Filtering
3.1 Response of LTI Systems （2.4）
Impulse Response and the Superposition Integral
Transfer Functions and Frequency Response
Block-Diagram Analysis
3.2 Signal Distortion in Transmission（3.1）
Distortionless Transmission
Linear Distortion
Equalization
Nonlinear Distortion and Companding
3.3 Transmission Loss and Decibels（3.2）
Power Gain
Transmission Loss and Repeaters
Fiber Optics
Radio Transmission
3.4 Filters and Filtering（3.3）
Ideal Filters
Bandlimiting and Timelimiting
Real Filters
Pulse Response and Risetime
3.5 Quadrature Filters and Hilbert Transforms（3.4）
……
Chapter 4 Linear CW Modulation
Chapter 5 Exponential CW Modulation
Chapter 6 Sampling and Pulse Modulation
Chapter 7 Analog Communication Systems
Chapter 8 Probability and Random Variables
Chapter 9 Random Signals and Noise
Chapter 10 Noise in Analog Modulation Systems
Chapter 11 Baseband Digital Transmission
Chapter 12 Digitization Techniques for Analog Messages and Computer Networks
Chapter 13 Channel Coding and Encryption
Chapter 14 Bandpass Digital Transmission
Chapter 15 Spread Spectrum Systems
Chapter 16 Information and Detection Theory
Appendix: Circuit and System Noise
Tables
Solutions to Exercises
Answers to Selected Problems
Index
