Wireless channel measurements and modeling for TCMS communications in metro environments

In this paper, channel measurements for the 2.6 GHz band in railway environments are presented. The measurements have been carried out in the subway of Madrid in different environments (tunnel, station and open air scenarios). An intra-consist link for a future wireless Train Control and Management System (TCMS) has been measured for two types of trains, a continuous train and a non-continuous train. The results in these two trains allow checking the impact of the separation between cars in this type of links and the influence of the environment. Wideband and narrowband measurements have been carried out, and Power Delay Profile (PDP), delay spread and pathloss have been extracted and are shown in this paper. Results are useful for the design of communications systems inside train cars.