Study on a Hierarchy of Delays for Outdoor Mobile Radio Communications

摘要

This work studies a hierarchy of delays for outdoor mobile radio communications.First of all, the narrow-band channel transfer function is derived. It contains the diffraction as well as single and double reflections by local buildings in the vicinity of the mobile, the reflection by remote large buildings, and electromagnetic scattering by distant mountains. It depends both on the polarization trasmitted electric fields and on a number of parameters setting relative positions of the base station, obstacles, and mobile as well as setting geometric and dielectric properties of these obstacles. Also, numerical results can be performed for any given set of input parameters. Delayed signal arrivals can be indicated by the time domain path loss. In this presentation, diffraction and reflections by local buildings are most important. (Copyright (c) 1995 by Helsinki, University of Technology.)