UWB Indoor Radio Propagation Modelling in Presence of Human Body Shadowing Using Ray Tracing Technique

This paper presents a ray-tracing method for modeling Ultra Wide Bandwidth indoor propagation channels. A validation of the ray tracing model with our indoor measurement is also presented. Based on the validated model, the multipath channel parameter like the fading statistics and root mean square delay spread for Ultra Wide bandwidth frequencies are simply extracted. The proposed ray-tracing method is based on image method. This is used to predict the propagation of UWB electromagnetic waves. First, we have obtained that the fading statistics can be well fitted by log normal distribution in static case. Second, as in realistic environment we cannot neglect the significant impact of Human Body Shadowing and other objects in motion on indoor UWB propagation channel. Hence, our proposed model allows a simulation of propagation in a dynamic indoor environment. Results of the simulation show that this tool gives results in agreement with those reported in the literature. Specially, the effects of people motion on temporal channel properties. Other features of this approach also are outlined.