对IRS辅助的THz通信系统的性能分析,通过色道和指向错误的色道进行分析
Sajid Hussain Alvi1, Bakhtiar Ali2, Jawad Mirza2
1Department of Physics, COMSATS University, Islamabad 45550, Pakistan.
Sensors (Basel, Switzerland)
|August 26, 2023
概括
这项研究分析了智能反射表面 (IRS) 辅助太赫兹 (THz) 无线系统的指向错误. 较大的IRS数组可以克服THz通信中指点错误引起的性能下降.
科学领域:
- 无线通信无线通信
- 电磁学 电磁学 电磁学 电磁学
- 信号处理 信号处理
背景情况:
- 太赫兹 (THz) 无线通信提供高带宽,但面临诸如路径丢失和对错位的敏感性等挑战.
- 智能反射表面 (IRS) 正在成为一种通过控制传播环境来增强无线通信的技术.
- 指出错误,特别是在室内THz场景中,会显著影响系统性能.
研究的目的:
- 为了分析IRS辅助的THz无线通信系统的性能,考虑指点错误.
- 为了获得关键性能指标的分析表达式,如ergodic容量和中断概率.
- 调查IRS配置在色条件下对系统性能的影响.
主要方法:
- 使用alpha-mu (α-μ) 色通道模型,经过THz室内环境的验证.
- 导出封闭形式的表达式,用于上限的 ergodic 容量.
- 开发停机概率的近似表达式,考虑IRS反射和直接道.
- 使用蒙特卡洛模拟验证分析结果.
主要成果:
- 在IRS辅助的THz系统中,指向错误会导致性能下降.
- 由于指向错误导致的性能下降,可以通过增加IRS中反射元件的数量来减轻.
- 该α-μ色模型准确地表示THz小规模色统计数据.
结论:
- IRS技术在增强THz无线通信方面表现有前途,但仔细考虑指向错误至关重要.
- IRS反射元件的数量是克服错位损失的关键设计参数.
- 由此产生的分析模型为未来THz IRS系统的性能评估和设计提供了有价值的工具.
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