Information transmission system for track-to-train communications - uses trackside responder with information transmission energy obtained from received interrogation signal

摘要

The transmission system uses an interrogation device (2) onboard the train incorporating a transmitter (11) and a receiver (12) for electromagnetic waves, coupled to an evaluation stage (13,14). The trackside information device (15) has a responder with a receiver (L2) for the interrogation signal, a transmitter (L3) for the information signal and a coding element (16). The energy used by the information device (15) for the information signal transmission is obtained from the transmission energy provided by the interrogation device (2). ADVNATAGE - Allows transmission of wide range of information.