Design of High-Speed Railway Wireless Communication System Based on Simulink

In this paper, a high- speed railway (HSR) wireless communication system based on orthogonal frequency division multiplexing (OFDM) is built by using Simulink, and a HSR channel in viaduct scenario is established. The LS channel estimation algorithm based on pilot sequence is used to restore and calibrate signals at the receiving end. By inserting the block pilots in the time domain and the frequency domain respectively, the impacts of different pilot insertion modes on the HSR wireless communication system are studied. The experimental results show that the comb pilots can maintain good performance even when the Doppler shift is severe, which is suitable for fast fading channels.