This text covers a broad range of topics in the field of wireless communications, with chapters describing state-of-the-art solutions along with basic theoretical studies in information and communications theory. Thus, the book offers a far-reaching panorama of this field. Contributions have been grouped into six areas. Many of the topics cut across all the protocol layers. In fact, as challenging as the more standard communication theory related problems are, it is the multifaceted and multilayer system problems of wireless and mobile communications that offer the most significant opportunities for breakthroughs. The book offers ideas and presents state-of-the-art technologies relevant to wireless communications, aiming to further the understanding of this fast-growing field. The material presented should be of use to students and researchers in their own search for solutions towards the realization of the wireless information age. The book may also be used as a text for advanced courses on the topic.