Propagation measurements with regional train at 60 GHz for virtual coupling application

A millimeter-wave (mmW) radio channel measurement campaign at 64.5 GHz for train's virtual coupling application was performed in a regional train in France. In this paper, we give a brief description of the channel sounder design and channel measurement campaigns with four dedicated scenarios including different setups and other channel parameters. The results of angular power distribution obtained by sweeping a horn antenna at the receiver side shows that the difference of the received signal levels (RSL) obtained at different azimuth angle of the same location can vary from 5 dB to 12 dB depending on different scenarios. Most of highest RSL are received at the angle of 0 degree. The mean delay and RMS delay spread have also been studied, from which it can be found that these parameters are uncorrelated with the TX-RX distance for the O2O and R2R scenarios while these parameter values turn out to be large for the O2D and O2DC scenarios at large TX-RX distances.