Optimizing Propagation Channels Using Static Scatterers: Modeling and Ray-Tracing Simulations

In this paper, we consider the possibility of improving the propagation of radio signals in complex environments using a set of simple purely passive resonant dipole scatterers. We use the Matlab ray tracer, amended with a model of dipolar scatterers based on their bistatic scattering cross-section, to analyze the influence of the scatterers on the received power at the user position. The analytical and simulation results show that placing additional scattering elements has no significant impact when a direct link exists. However, in non-line-of-sight scenarios, the proposed technique can significantly contribute to the delivered power. This simple and low-cost method can be an alternative or additional method of channel optimization, complementing the use of reconfigurable intelligent surfaces.