Measurement Based Ray Tracer Calibration and Channel Analysis for High-speed Railway Viaduct Scenario at 93.2 GHz

摘要

In this paper, ray tracer (RT) is employed to simulate the propagation in a high-speed railway viaduct scenario at the frequency of 93.2 GHz. By comparing the path loss between simulation and measurement, the permittivity and loss tangent of concrete which is the material of viaduct are calibrated in the ray tracer. The average error between calibration result and measurement is 0.2 dB. The calibrated and validated RT is used to study propagation channel in viaduct scenarios. Rician K-Factor and root-mean-square (RMS) delay spread are further analyzed, from which a conclusion that the typical structure of viaduct and the application of horn antenna lead to a small value of Rician K-Factor and RMS delay spread is drawn.