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Multi-User Scheduling for 6G V2X Ultra-Massive MIMO System.

Shibiao He1, Jieru Du2, Yong Liao2

  • 1School of Electronic Information, Chongqing Institute of Engineering, Chongqing 400056, China.

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Summary

This study introduces a new scheduling algorithm for 6G vehicle-to-everything (V2X) communications. It enhances wireless link quality and channel gain for high-speed vehicles, improving automatic driving systems.

Keywords:
6G V2Xmatrix correlationmulti-user schedulingnoise enhancement factorprecoding

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Area of Science:

  • Wireless communication systems
  • Signal processing
  • Telecommunications engineering

Background:

  • 6G vehicle-to-everything (V2X) communication is crucial for automatic driving.
  • High-speed vehicle movement in 6G V2X systems necessitates stable wireless links and improved channel gain.
  • Existing multi-user scheduling algorithms face challenges in optimizing performance for dynamic V2X environments.

Purpose of the Study:

  • To propose a novel multi-user scheduling algorithm for 6G ultra-massive MIMO systems tailored for V2X communication.
  • To enhance wireless link quality and channel gain for high-speed mobile users in 6G V2X networks.
  • To address the challenge of selecting users with high-quality channels while minimizing channel correlation.

Main Methods:

  • Developed a new multi-user scheduling algorithm utilizing block diagonalization (BD) precoding.
  • Employed the Pearson coefficient on vectorized matrices to quantify inter-user channel correlation.
  • Introduced a scheduling factor, incorporating user noise enhancement, to assess channel quality.
  • Jointly optimized channel quality and minimized channel correlation for user selection.

Main Results:

  • The proposed algorithm achieves higher user channel gain compared to existing methods (subspace correlation, condition number, geometric angle).
  • Demonstrated a significant reduction in the system's bit error rate.
  • Validated the algorithm's effectiveness and applicability in 6G V2X communication scenarios.

Conclusions:

  • The novel BD precoding-based scheduling algorithm effectively improves channel gain and link reliability in 6G V2X systems.
  • The algorithm's joint consideration of channel correlation and quality offers superior performance over traditional approaches.
  • This method provides a viable solution for enhancing the performance of automatic driving systems reliant on 6G V2X communication.