Principles of Electronic Communication Systems provides the most up-to-date survey available for students taking a first course in electronic communications. Requiring only basic algebra and trigonometry, this new edition is notable for its readability, learning features and numerous full-color photos and illustrations. A systems approach is used to cover state-of-the-art communications technologies, to best reflect current industry practice. This title is available in Connect with SmartBook, featuring end-of-chapter homework problems and auto-graded questions from the manual. Instructor Resources for this title include an Instructor's Manual and Lab and Experiments Manual Answers.