Digital Communication is intended for designers and would-be designers of digital communication systems. The overall focus is on the transport of bit streams from one geographical location to another over various physical media such as wire pairs, coaxial cable, optical fibre and radio waves. In addition, there is coverage of the multiple access and synchronization issues relevant to constructing communication networks that simultaneously transport bit streams from many users. The material in this book is thus directly relevant to the design of a multitude of digital communication systems including local and metropolitan area data networks, voice and video telephone systems, digital CATV distribution, digital cellular and radio systems, the narrowband and broadband integrated services digital network (ISDN), computer communication systems, voiceband data modems and satellite communication systems. The common principles underlying these and other applications are extracted and presented in a unified framework. In the second edition existing material has been extensively revised and new material has been added. Two major topics which are emphasized are the combination of coding with intersymbol interference, and fading channels and wireless communicaton. Chapters 6-8 of the first edition have been completely rewritten and have become Chapters 6-10 in the second edition. In addition, solutions have been added to the exercises at the end of the book. This work is suitable as a first-year graduate textbook and should also be of interest to many professionals in industry. The book has been made more attractive to both audiences through the inclusion of many practical examples and a practical flavour in the choice of topics.