The Fading Characteristic of the GSM-R Network’s Field Intensity under Raining Condition

Abstract

The signal strength of the GSM-R network’s field intensity attenuates under raining condition due to the raindrop’s absorption and scattering. Moreover, the fading characteristic is influenced greatly by the scattering effect of the rainfall. Without regard to the landform and other factors, this paper uses Mie Theory to research the receiving level’s attenuation coefficient at different rainfall rates. And the related knowledge of electromagnetic waves through random medium is used to analyze the receiving level’s fading characteristic under raining condition. Analytical results indicate that the fading distribution model of the receiving level in GSM-R network is changed, except for the strength’s attenuation. Moreover, the fading depth grows under raining condition as a result of the scattered power caused by the raindrop. The analysis in this paper is proved by the measured data along the test section of Beijing-Tianjin line, and the research results provide the theoretical basis for GSM-R network’s anti-fading measures in the severe weather.