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<p>With the relatively less impact of Doppler spread introduced by high-speed movement and lower propagation attenuation for the signal at lower frequency bands, wireless communication technology based on leaky coaxial cables (LCXs) is widely applied to the mobile communication of high-speed train in pipeline or tunnel scenarios. Considering this architecture, the 5th&#xa0;generation (5G) system using the standard frequency band at 700 MHz is considered as a key approach to achieve the communication of ultra-high-speed (UHS) maglev transport in low vacuum pipeline facing the vision of UHS support and green sustainability of the 6th&#xa0;generation (6G) wireless communication. For this scenario, a minimum mean square error (MMSE) time-domain channel estimation with improved autocorrelation function is proposed in this paper based on the 5G standard frame structure. The performance of this method used in UHS mobile communication system under the LCX is simulated and compared. The simulation results indicate that the improved MMSE channel estimation will provide significant performance gains in target metrics, as well as reducing the power consumption under the same transmission configuration in the UHS mobile communication based on LCXs, which is potentially applied for the implement of the UHS and green 6G in ground transportation with the corresponding system scheme.</p>

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Improved MMSE channel estimation for ultra-high-speed mobile communication system with leaky coaxial cables

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月10日

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  • Penghui Liu,
  • Cairangtai Bao,
  • Pingwa Ma,
  • Qian Chen,
  • Yu Liu,
  • Dongming Wang,
  • Tiecheng Song

摘要

With the relatively less impact of Doppler spread introduced by high-speed movement and lower propagation attenuation for the signal at lower frequency bands, wireless communication technology based on leaky coaxial cables (LCXs) is widely applied to the mobile communication of high-speed train in pipeline or tunnel scenarios. Considering this architecture, the 5th generation (5G) system using the standard frequency band at 700 MHz is considered as a key approach to achieve the communication of ultra-high-speed (UHS) maglev transport in low vacuum pipeline facing the vision of UHS support and green sustainability of the 6th generation (6G) wireless communication. For this scenario, a minimum mean square error (MMSE) time-domain channel estimation with improved autocorrelation function is proposed in this paper based on the 5G standard frame structure. The performance of this method used in UHS mobile communication system under the LCX is simulated and compared. The simulation results indicate that the improved MMSE channel estimation will provide significant performance gains in target metrics, as well as reducing the power consumption under the same transmission configuration in the UHS mobile communication based on LCXs, which is potentially applied for the implement of the UHS and green 6G in ground transportation with the corresponding system scheme.