Tracking trains via radio frequency systems

The technological evolution which occurred in digital systems favored the appearance of new services to be applied in railways. Radio communications played an important role in the management, exploration, and maintenance of railway transports. Due to the vital importance of security, the track-to-train communications system is studied in depth, with significant changes through the integration in its operation of the global system for mobile communication and global positioning systems. This paper presents an integrated system that simultaneously includes a radio communication system and a location solution. The proposed network will work as a redundant and also as a unique system for secondary lines where no other system is available. Moreover, the paper also presents a low-budget system to track the trains inside tunnels.