The Effect of High-Speed Train Channel on the Performance of DVB-Terrestrial Communication Systems

Abstract

The high mobility associated with high-speed train (HST) results in nonstationary channel conditions that characterized by varying environments leads to challenges like rapid changes in signal strength and quality. As train speeds increase, the Doppler shift occurs and the Peak to Average Power Ratio (PAPR) in the system also increases, which is a common challenge in modulation schemes such as Orthogonal Frequency Division Multiplexing (OFDM). The paper investigates the impact of HST environments on the performance of Digital Video Broadcasting -Terrestrial (DVB-Terrestrial) systems. It primarily focuses on OFDM and evaluates various performance metrics like Bit Error Rate (BER), Complementary Cumulative Distribution Function (CCDF), PAPR, and the 64-QAM constellation diagram in different HST speeds. The study includes a comprehensive analysis of the HST channel and its integration with the DVB-Terrestrial system. Key findings demonstrate how higher speeds result in increased PAPR values and changes in the 64-QAM constellation diagram, indicating the necessity for robust power amplifiers and efficient symbol detection methods. The paper also shows that while higher HST speeds generally lead to worse BER values, the performance of channel coding can mitigate this effect to some extent. The research provides significant insights for optimizing DVB-Terrestrial communication systems in HST environments, highlighting the importance of channel coding and modulation in maintaining signal quality and system efficiency.