Research on Transmission Performance of Double Leakage Cable Based on LTE-M System under Tunnel Simulation Environment

Abstract

With the improvement and maturity of LTE technology, the vehicle-ground wireless communication system based on it has become a new technical direction of rail-vehicle-ground communication in recent years. Based on an LTE-M vehicle-to-ground wireless communication system covered by double leaky cables, load simulation service tests were carried out to test the transmission performance of leakage coaxial cables. This study found out that when two leakage cables are HV: one is horizontally polarized and another vertically polarized, the average transmission rate of the vehicle-ground communication system of the same polarization mode increased by about 50%. At the same time, there was no significant decrease with the system transmission rate when the space between them reduced from 1 m to 0.3 m. Thus, an optimized leakage cable deployment scheme was obtained. When the horizontally polarized and vertically polarized leakage cable was used and the space between the two leakage cables was 0.3 m, the optimum transmission rate has been achieved.