Present-day mobile communications systems can be classified as fixed-to-mobile because they allow mobility on only one end (e.g. the mobile phone to a fixed mobile operator's cell tower). In answer to the consumer demand for better coverage and quality of service, emerging mobile-to-mobile (M-to-M) communications systems allow mobile users or vehicles to directly communicate with each other. This practical book provides a detailed introduction to state-of-the-art M-to-M wireless propagation. Moreover, the book offers professionals guidance for rapid implementation of these communications systems. It offers engineers and students a thorough understanding of signal propagation and channel models for vehicle-to-vehicle, air-to-ground, and underwater vehicle-to-underwater vehicle communications. DVD Included! It contains time-saving MATLAB code for the models discussed in the book, providing valuable tools that engineers can use for their projects in the field.