Modeling human body effects for indoor radio channel using UTD

In this paper, a practical deterministic propagation prediction model is introduced to investigate the human body-scattering effects in the indoor channel using the uniform geometrical theory of diffraction (UTD). In the model, the human body is approximated with a perfect conducting circular cylinder and then combined with the ray-tracing technique to deal with particular indoor propagation scenarios. By maintaining both the transmitter and the receiver at fixed positions, we investigated the nature of propagation due to the movement of the cylinder in a predetermined parallel path with respect to the line-of-sight (LOS) path between the transmitter and receiver. In order to validate the developed model, continuous wave (CW) experimental measurements are conducted and have successfully fitted the predicted data. Results also indicate that reflections onto persons are significant and will have to be considered in developing a full deterministic model of the indoor propagation channel.