对于IRS辅助MIMO的道估计技术的性能分析
1Department of Electrical and Computer Engineering, Woldia University, Woldia, Ethiopia. alelign.ew@wldu.edu.et.
Scientific reports
|August 21, 2023
概括
研究人员正在探索超越5G无线通信,使用特拉赫兹 (THz) 频率和智能反射表面 (IRS). 压缩传感技术,即使有不完美的IRS元素,也显示出对高效的通道估计的希望.
科学领域:
- 无线通信无线通信
- 信号处理 信号处理
- 超材料是指一种超材料.
背景情况:
- 在无线通信中,对低延迟和高数据速率的需求超过了当前的5G能力.
- 特拉赫兹 (THz) 频率提供了很大的带宽,而智能反射表面 (IRS) 可以减轻高频信号阻塞.
- 频道估计对于无线系统至关重要,压力传感降低了对飞行员符号的要求.
研究的目的:
- 调查超越5G无线系统的通道估计技术,使用特拉赫兹 (THz) 频率和智能反射表面 (IRS).
- 分析不完美的IRS元素对道估计性能的影响.
- 为了比较不同频道估计算法在不同信号噪声比率 (SNR) 和试验长度下的有效性.
主要方法:
- 使用压缩传感技术进行通道估计,特别是正交对应追踪 (OMP).
- 通过引入振幅扰动来建模不完美的IRS元素.
- 使用规范平均平方误差 (NMSE) 和光谱效率 (SE) 度量表的性能分析.
- 最小平方 (LS),OMP和Oracle算法的比较.
主要成果:
- 与最小平方 (LS) 算法相比,直角匹配追求 (OMP) 算法表现出更高的性能,特别是使用较少的试点符号.
- 压缩传感对于稀疏的毫米波和THz信号的通道估计是有效的,即使是不完美的IRS.
- 在不同的信号噪声比率 (SNR) 和试验长度 (T) 中分析性能.
结论:
- 与传统的LS方法相比,OMP在THz-IRS系统中提供了一种更有效的道估计方法.
- 该研究验证了未来在THz频率运行的无线网络压力传感的可行性.
- 可以考虑不完美的IRS元素,从而对道估计性能进行更现实的评估.
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