Railway detection system, railway infrastructure and method for detecting the presence of a railway vehicle

A railway detection system for detecting the presence of a railway vehicle on a railway track section comprising at least two rails, the railway track section comprising a first end and a second end opposite to the first end in a longitudinal direction of the railway track section, the railway detection system comprising a track circuit system comprising:

• a signal generator electrically coupled to the first end of the railway track section, the signal generator being configured for generating a first track circuit signal to be injected into the railway track section at the first end, wherein the signal generator is adapted to:
• generate a first component of the first track circuit signal comprising at least one DC pulse;
• generate a second component of the first track circuit signal, the second component comprises at least one element chosen from a constant DC signal and a constant frequency AC signal,
• add the first and the second component so as to obtain the first track circuit signal,
• a track circuit receiver connected to the second end of the railway track section and adapted to receive the first track circuit signal injected by the signal generator into the railway track section;
• a track circuit detection device connected to the track circuit receiver, the track circuit detection device being configured for determining that the railway track section is clear of railway vehicles.