Introduction to Digital Communications

The level of the presentation is appropriate for advanced undergraduates and beginning graduate students in electrical and computer engineering. This book provides an introduction to the basic concepts in digital communications for students with little or no previous exposure to either digital or analog communications. The intent is to help the student develop a firm understanding of digital communication system engineering in order that he or she will be able to conduct system-level design and analysis for digital communication systems of the future. As a result, the book emphasizes the basic principles of digital communications theory and techniques, rather than to present specific technologies for implementation.

Features

• Chapters 3-5 are devoted to second-order random processes - Emphasizing correlation functions, spectral densities, and their role in the analysis of random processes in linear systems, the student will obtain a solid understanding of random processes that is essential to the study of digital communications.
• The basic principles of digital communications are presented in Chapters 6-8 - Covers baseband communications, coherent radio-frequency communications, and noncoherent radio-frequency communications, provides the student with the core background needed for a career in wireless communications system design.
• The basic principles of matched filtering, optimal correlation receivers, and statistical decision theory are introduced in the simpler setting of baseband communications in Chapter 6, the complications of carrier phase estimation and noncoherent reception are postponed until later chapters, after the student has first mastered the basic principles of optimal and suboptimal filtering and optimal decision strategies.
• Chapters 7 and 8 are devoted to carrier-modulated digital communications, exploits the students familiarity with the Fourier series to explain optimal coherent receivers for binary and quaternary phase-shift keying and optimal noncoherent receivers for frequency-shift keying
• Intersymbol-interference effects and equalization are introduced in Chapter 9, and direct-sequence and frequency-hop spread spectrum are described in Chapter 10, chapter 10 includes descriptions of the spread-spectrum modulation used in the Global Positioning System (GPS) and is mobile cellular telephone systems.