This exciting revision of Communication Systems, a classic text in the communications field, presents an introduction to electrical communication systems, including analysis methods, design principles, and hardware considerations. The fifth edition has been updated to reflect current technology covering both analog and digital communication in this ever-evolving field. Conceptual/descriptive/thought questions have been added throughout the book as well as MATLAB (R) questions and lecture Powerpoint files on the website. The text covers both analog and digital communications. It features worked examples and exercises for students to solve within chapters, helping them to master new concepts as they are introduced.