Analysis of UHF propagation in a city street modeled as a random multislit waveguide

Attempts to reduce the interference level and consequently increase the spectral efficiency of the cellular radio communication systems require the lowering of antenna heights. In large metropolitan areas having high buildings such a requirement leads to a situation where the transmitting and receiving antennas are both located below the rooftops and the city street acts as a type of a waveguiding channel for the propagating signal. In order to optimize the design of the local communication networks there is a need to develop efficient algorithms for computation and mapping of the field distribution in such structures. We apply the waveguide model for a city street with irregularly spaced high buildings by employing ray-optical methods. This approach allows us to compute not only the variations of the energetic parameters of the field along the city street but also to present analytical expressions for the spatial structure of the field and to account in the future for the influence of the roughness of the walls and scattering by trees and other obstacles.