Wireless Channel Characterization for the High-Speed Flying Trains in Vacuum Tube Scenario Based on Propagation Graph Modeling Theory

With the development of conventional wheel high speed railway, the Vacuum Tube High-speed Flying Train (high-speed flying train) has gradually entered people's vision. In order to analysis and evaluate the wireless channel characterization for the in vacuum tube scenarios. A modeling way based on propagation graph modeling theory and Lambertian scattering pattern is adopted. By using this way, the virtual channel impulse response (CIR) considering the line-of-sight (LoS) and single-bounced components is obtained. Then the wireless channel characterizations including the Doppler power spectrum and the K factor are analyzed and evaluated. And the results of train and no train in the tube are compared. The obtained results will provide reference for the future communication system design in the vacuum tube scenarios.