This book aims to provide post graduate students and practising engineers with a thorough understanding in the core principles and design issues of digital communications to meet the industry demand for in-depth expertise in digital transmission techniques. It concentrates on giving a solid foundation of core principles and design issues of digital communications. Engineering concepts and underlying physical considerations are described as well as a clear appreciation of the parameters involved. It is the ideal textbook for those that wish to undertake digital communication systems analysis, design and computer simulations, deal with specialised applications and keep up to date with advances in the technology. Topics covered include: linear channels and systems, nonlinear systems, quantisation and PCM, source coding and lossless data compression, line codes and transmitted digital signals. It is an ideal textbook for postgraduate and advanced undergraduate students studying telecommunications subjects. This book will also provide practicing engineers with a through grounding in the core principles and design issues of digital communications.