Numerical estimations of the propagation characteristics of wireless links in high-speed train cars

EMF distributions established in high-speed train cars as experienced by a 5.2 GHz wireless LAN terminal were estimated. Based on field distribution analyses, the energy absorption effects of the passengers´ bodies were determined. This absorption cannot be neglected inside train cars. The proposed numerical estimation method can evaluate the degradation in quality and service availability of wireless access due to the absorption effects quantitatively and will contribute to the advancement of radio link designs for wireless LANs operating inside train cars. We intend to conduct other estimations that consider different train models, more antenna sources, and different types of transmitting antenna.