BIDIRECTIONAL INFORMATION TRANSMISSION SYSTEM BETWEEN A GROUND STATION AND A STATION ON A RAILWAY VEHICLE

摘要

P BIDIRECTIONAL INFORMATION TRANSMISSION SYSTEM BETWEEN A GROUND STATION AND A STATION ON A RAILWAY VEHICLE. / P P EXCHANGES OF INFORMATION ARE IN MICROFREQUENCY, THE STATION ON THE GROUND BEING CONNECTED WITH A GUIDE D WAVES 25 AND THE STATION ON A RAIL VEHICLE CONNECTING WITH AN ANTENNA 26. EACH STATION HAS A HYPERFREQUENCY GENERATOR 19 DELIVERING A CARRIER, TRANSMITTERS 3 TO 7 DELIVERING SUBCARRIERS, RECEIVERS 28 TO 32 AND A PILOT GENERATOR 1. THE CARRIER AND SUBCARRIERS HAVE MULTIPLE FREQUENCIES OF THE PILOT FREQUENCY, THE FREQUENCY DIFFERENCE BETWEEN TWO SUCCESSIVE SUBCARATORS BEING EQUAL TO THE PILOT FREQUENCY. A MTX TRANSMITTER RECEIVES THE CARRIER AND THE SUBCARRIERS AND IS CONNECTED TO A CIRCULATOR 24 ITSELF CONNECTED TO THE WAVEGUIDE 25 IN THE GROUND STATION AND THE ANTENNA ON THE VEHICLE. / P A MRX RECEPTION MIXER IS CONNECTED BY A FILTER 23 TO THE CIRCULATOR 24 AND RECEIVES THE CARRIER OF THE MICROFREQUENCY GENERATOR; IT IS RELATED TO THE RECEIVERS 28 TO 32 TO WHICH IT ISSUES THE SUBCARRIERS ISSUED BY THE OTHER STATION. / P