Abstract

The high-speed railway (HSR) environment has unique characteristics in radio propagation. The research on radio channel in HSR plays a vital role in system design, especially for advanced mobile systems working in the millimetre-wave band. This paper presents the simulation in a typical straight and arched tunnel at 30 GHz band with a verified ray-tracing tool. The simulation results illustrate that the advanced mobile communication system with high gain directional antennas can support longer than 1 km communication links in the tunnel. In this paper, the channel characteristics of three different antenna setups are compared at frequencies ranging from 31.5 GHz∼33.5 GHz, e.g., path loss exponent, autocorrelation and decorrelation distance of shadow fading, etc. Additionally, these characteristics will be shown with statistic values that can easily reproduce the radio channel properties. Furthermore, the results will be utilized to guide further realistic measurement campaign and physical layer design for advanced mobile communication systems.

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