INTRODUCTION TO DIGITAL COMMUNICATIONS 2ED (HB 2021) Hardcover

This book provides a thorough introduction to the theoretical foundations of digital communications for students, scientists, and engineers. It covers single-antenna (SISO), multi-antenna (MIMO), and systems that change over time. To aid understanding, the core concepts are reinforced with numerous examples and computer simulations. The book is structured in three parts. Part one explores the basics of digital signal transmission over both wired and wireless connections using a single antenna. It discusses how digital signals are shaped for transmission, the interference between consecutive symbols, and various methods for recovering the original signal. It also introduces models for realistic wireless channels that change over time and develops a simplified mathematical representation for these systems. This part includes new sections on transmitting data in blocks and using multicarrier modulation with OFDM, a common technique in modern wireless systems. Recognizing that some readers may not have a background in systems that change over time, Part two focuses on the theory of these linear time-variant systems. It explains a generalized form of convolution and introduces key concepts like the impulse response, the delay spread function, and how these systems behave in the frequency domain. It also discusses systems where the characteristics change randomly. This part has been updated with new examples and figures. Finally, Part three delves into MIMO systems, which use multiple antennas at both the transmitter and receiver. It describes how to model MIMO channels, considering scenarios with and without spatial relationships between the signals at different antennas, including a specific model called the Kronecker model. The book examines both straightforward and more complex receiver designs for MIMO systems. It answers the question of how much data can be transmitted per channel use and discusses how to maximize the data rate. It also outlines the principles of space-time coding, a technique used to improve transmission reliability and increase data speeds. The book concludes by describing multi-user MIMO techniques, which help reduce interference when multiple users in the same area send signals simultaneously using the same time and frequency resources. This comprehensive guide is relevant for those studying and working in digital communications in Noida, Uttar Pradesh, India, and globally.