Improved Channel Model and Analysis of the Effect of Bodies in Curved Tunnel Using Ray Tracing

Human body area communication has been widely used in the fifth-generation (5G) wireless communication systems. Human bodies bring complexity for channel modeling, and directly affect the performance of the wireless communication systems. In this letter, channel measurements, simulations, and modeling are carried out in a curved tunnel scenario with several human bodies. A human body is modeled by two typical methods to analyze the influence of the channel modeling on the accuracy based on measurements and the innovative ray-tracing method. The comparison of path loss models is provided and a novel generalized path loss model in terms of the curved tunnel scenario is proposed. Multipath dispersion properties are characterized and corresponding statistical distributions are also investigated. Furthermore, the multipath component parameters including angular characteristics of angle of arrival and power of multipath components are analyzed. Multipath clustering is identified using the multipath component distance.