This best-selling communication systems text continues to include the most comprehensive and rigorous coverage of digital communications in an undergraduate level text in this Fifth Edition. In addition to being the most up-to-date communications text available, Simon Haykin has reintroduced features and coverage that have made this text a best-seller. Haykin now features equal and thorough coverage of both analog and digital material. This fifth edition builds upon the success of previous editions by providing a comprehensive and up-to-date treatment of both analog and digital communication systems. It offers a clear and accessible explanation of fundamental concepts, supported by numerous examples and problems. The book covers a wide range of topics, including modulation techniques, noise analysis, information theory, and error control coding.