Time-frequency processing adapted for the different electromagnetic compatibility issues in the railway domain

The railway environment is very rich in terms of electromagnetic disturbances. The variety of the transient and permanent interferences and the current evolution of the communication and signaling railway systems require the adaptation of EMC railway standards. In particular, standardized emission measurement methodologies are not fully adapted to measure transient interferences which can significantly affect new railway signaling and communication systems. In this paper, we study a new time-frequency processing specifically designed for railway EMC issues, which could be implemented on real time spectrum analyzers. A flexible methodology is proposed offering an optimum analysis in relation with the technical specifications of the different railway signaling and communication systems.