First, review the fundamentals of spectrum reuse, and how careful balancing of signal strength and interference is central to wireless system design. Discover how channel characteristics can be strongly influenced by buildings, vegetation and terrain. Learn how multipath propagation adds complexity to RF engineering, and master new techniques for harnessing multipath signals to achieve capacities approaching theoretical limits. Review key propagation effects, from path loss in narrowband signals to angle or arrival and delay spread in wideband transmissions. Understand plane waves and how they can be used to model fast fading, Doppler spreading, and other aspects of radio propagation. The book includes new coverage of diffraction at building edges; average path loss in residential environments; ray based models for predicting propagation, and more. Throughout, the book presents sophisticated models and compares their results with real-world measurements.