The book addresses the study and design of efficient and flexible physical layers for broadband mobile and fixed satellite links. The chapters focus on long-term developments addressing advanced physical layer techniques for braodband communications, fixed and mobile terminals, and 4G evolutions with possible convergence betwee different technologies. The book provides a unified view of services and applications, fundamental theories, channel coding, modulation, synchronization and parameter estimation, distortions and countermeasures, diversity techniques, multiplexing and multiple access schemes, and software radio..