Introductory Digital Wireless Communications presents the fundamentals of modern digital communication systems and evaluates their performance using realistic channel models. The reader will gain a basic understanding of the physical layer of digital communication systems and be exposed to wireless channel modeling and cellular land mobile radio systems. The textbook provides all the necessary background material in probability, random processes, and signals and systems for the reader to be successfully introduced to the core principles in physical layer communications. It takes a mathematical modeling approach and provides detailed step-by-step derivations of key results, along with examples, to guide the reader in the subject matter. Problems are provided at the end of each chapter. The textbook is appropriate for a senior-level quarter or semester course in either digital communications or wireless communications.