Modeling and analysis of railway GMSK reception vulnerability to electromagnetic interference (original) (raw)
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In order to offer Internet access on-board trains, Wi-Fi and LTE connections are required. These communication systems can be susceptible to electromagnetic (EM) interferences present in the railway environment at high frequency, produced by loss of contact between the catenary and the pantograph. We are mainly interested in the frequencies above 2 GHz, in which LTE and Wi-Fi operate. This paper presents measurements that were carried out to characterize transient interferences above 2 GHz. Two different measurement processes were carried out in order to analyse the impact of the measurement methods on the observed main characteristics of the transient interferences. The experimental results are analyzed in the time and frequency domains.
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For reliability and safety purposes, the signaling systems in the railway domain are continuously evolving. Today, in Europe, the GSM-R is used as a part of the European Railway Traffic Management System (ERTMS) and the transmission of signaling information is increasingly ensured by the GSM-R. With the evolution of the telecommunication systems, new technologies using OFDM techniques, such as LTE could be exploited for railway applications. However, knowing that the railway electromagnetic environment is very hostile and rich in terms of electromagnetic interferences, studies need to be carried out to anticipate the EMC issues that could impact LTE performances. In this paper, we propose a comparative study between GSM-R and LTE communications in the presence of transient electromagnetic interferences, generally present on board trains.