A study on future train radio communication system using millimeter-wave and subcarrier multiplexed lightwave system

This paper presents a concept of a multimedia railway information and communication system for train operation and passengers, which is an intra-network system for railway information connected to the public network. It proposes a new train radio communication system between trains and ground facilities, which adopts a subcarrier multiplexed (SCM) lightwave system in the feeder links and a 45 GHz band submillimeter wave radio communication system in the radio links, for high-speed and large-capacity communication such as multichannel quasi-videos. It also describes the performance estimation of this proposed system, obtained by computer simulation. The estimation results show a high degree of feasibility in all cases