Simplified path gain model for mobile-to-mobile communications in an urban high-rise environment

The goal of this work is to create a short-range urban propagation model to predict small area average path gain for mobile to mobile communications with computer running time on the order of 10 ms per link. To achieve such short computation time for a high-rise urban environment, only significant ray paths which travel in the horizontal plane (HP) are considered. The path gain for line of sight (LOS) receiving and transmitting antenna orientation is modeled with the 2-Ray model. For Non-Line of Sight (NLOS) orientations, the dominant ray paths are ray paths that diffract at building corners in the horizontal plane. To compute the contribution to path gain from these diffracted ray paths, approximations on the 2-Ray model and the Geometric Theory of Diffraction (GTD) are utilized. This urban propagation model was validated against empirical models and measurements taken in San Francisco, Boston, Philadelphia, and Manhattan.