Analysis and Modeling of the LTE Broadband Channel for Train-Ground Communications on High-Speed Railway

The increasing interest that has been drawn to LTE system used in High-Speed Railway therefore requires measurement and analysis of broadband mobile channel for train-ground communications. By the approval of the Ministry of Railways of China, extensive and practical measurements are performed on Harbin-Dalian passenger dedicated line with the maximum running speed of 370 km/h. Based on the hierarchical two-hop network structure, this paper first presents comprehensive analyzed results of channel characteristics in viaduct scenario, including both the large-scale and small-scale fading parameters. The proposed path loss model benefits LTE system link budget and feasible transceiver-range determination. In particular, channel impulse response, power delay profile, the delay spread, the number of paths and delay-Doppler spectrum are extracted, evaluated and reported. All these informative results promote the evaluation and verification of broadband communication system on High-Speed Railway.