Site-Specific formulations for determining Channel effects on a propagating Signal

This paper proposes a versatile and user friendly method to determine the channel effects on a propagating signal, which exists within a space-time, coordinate in a built-up-area where there is clutter along a signal path length. In this approach, the reflected and/or diffracted rays as well as the order of the resultant coefficients are determined by the number of obtrusive surfaces where total reflectors and geometrical diffracting edges are assumed. Computed results of varying channel propagation path parameters using ray tracing techniques incorporating uniform theory of diffraction (UTD) are compared to physical measurements carried out in street canyons formed by vertical buildings of known electrical characteristics