Ray Tracing with Fresnel Zone Theory for Fixed Wireless Access Channel Characterization

Until now deterministic models only considered the power loss of a ray due to its total path length or its interactions with the environment (i.e. reflections, diffractions). However, in the fixed wireless access scenarios the radio waves propagate close to roof tops and according to the theory of the Fresnel zones, even when for LOS conditions, the loss can be as much as 6 dB due to a single obstacle just below the ray path. The aim of this paper is to investigate how the radio channel characterization is affected by the partial blockage of the Fresnel zones. Simulation results show that the received power is the channel characteristic mostly affected.