Emulation of Radio Technologies for Railways: A Tapped-Delay-Line Channel Model for Tunnels

IEEE Access

Marion Berbineau¹  Juan Moreno Garcia-Loygorri²  Hao Qiu³  Ke Guan³  Danping He³  Ziheng Xu³  Bo Ai³ 

[1] COSYS-LEOST, Universite Gustave Eiffel, Champs-sur-Marne, France;Engineering and Research and Development Department, Madrid Metro, Madrid, Spain;State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing, China;

关键词: Channel modeling;    propagation;    railway communications;    tapped-delay-line models;    tunnel;   

DOI  :  10.1109/ACCESS.2020.3046852

来源: DOAJ

【 摘 要 】

Radio access technologies (RATs) are a key topic in railways, enabling them a better service rendering in terms of shorter headways between trains, higher safety levels and higher customer satisfaction. Very often, these railway RATs need a lot of time to be developed, tested and put into service, which implies a lack of efficiency and bottlenecks in the evolution of railway systems. To solve this situation, an emulation platform that considers both the physical layer and the network (this is, able to emulate the end-to-end chain) is envisaged in the EmulRadio4Rail project. Therefore, the physical layer of many railway scenarios must be emulated, which is a remarkable challenge because railways are very diverse. We see Tapped-Delay Lines (TDL) models as the most efficient way for emulation with the available hardware. In the literature, there are many TDL-based channel models for all the scenarios we considered but one: tunnels. Therefore, in order to fill this gap, we develop a novel TDL model for railway tunnels, considering the impact of the rolling stock (both high-speed railway (HSR) and subway trains). The proposed model allows the full characterization of this scenario in terms of power-delay-profile (PDP), Doppler spectrum and fading characteristics.

【 授权许可】

Unknown