Path Loss in Metro Train in mm-wave Band with Consideration of Human Body Effect

Metro trains are densely populated, where human body occlusion has a great influence on radio propagation. Based on ray tracing (RT) technology and human body models, this paper investigates the channel characteristics in metro train with consideration of human body effect at 38 GHz millimeter wave (mm-wave) band. Due to human body occlusion, the line of sight (LOS) does not always exist, so the LOS probability is discussed, and the metro train area is divided into LOS, obstructed LOS (OLOS) and non-LOS (NLOS) regions. The additional loss is modelled, and the path loss models are obtained.