This textbook takes a unified view of the fundamentals of wireless communication, and explains the web of concepts underpinning these advances at a level accessible to an audience with a basic background in probability and digital communication. Particular emphasis is placed on the interplay between concepts and their implementation in systems. An abundant supply of exercises and figures reinforce the material in the text. This book is intended for use on graduate courses in electrical and computer engineering and will also be of great interest to practicing engineers.