在室内多用户可见光通信物联网系统中,用于光学RIS辅助NOMA的通道建模和容量优化
Mohamed El Jbari1, Mohamed Moussaoui2, Felipe Augusto Pereira de Figueiredo3
1Information and Communication Technologies Laboratory (LabTIC), National School of Applied Sciences of Tangier (ENSAT), Abdelmalek Essaadi University, Tetuan, Morocco. mohamed.eljbari2@etu.uae.ac.ma.
Scientific reports
|November 27, 2025
概括
本研究介绍了一种光学重新配置的智能表面 (ORIS) 辅助系统,使用非直角多重访问 (NOMA) 和 DFT-s-OTFS调制用于可见光通信 (VLC). 这种新的方法显著提高了5G和6G网络的频谱效率和安全性.
科学领域:
- 光学通信是指光学通信.
- 无线网络 无线网络 无线网络
- 信号处理 信号处理
背景情况:
- 可见光通信 (VLC) 在5G/6G网络中面临挑战,包括要求更高的光谱效率 (SE),数据速率和服务质量 (QoS).
- 现有系统需要针对室内环境,绿色物联网 (IoT) 和具有移动性的用户进行优化.
- 集成先进技术,如可重新配置的智能表面 (RIS) 和新型调制方案,对于未来的光学无线网络至关重要.
研究的目的:
- 提出和评估一种新的可见光通信 (VLC) 系统,以满足5G和6G网络不断变化的需求.
- 为了提高VLC系统中的光谱效率,数据速率和物理层安全性 (PLS).
- 为了研究光学可重新配置智能表面 (ORIS) 辅助的多输入多输出 (MIMO) 集成与非直角多访问 (NOMA) 和 DFT-s-OTFS调制的性能.
主要方法:
- 开发一个用于ORIS辅助的NOMA-OTFS系统的VLC通道模型,其中包含MIMO技术.
- 考虑收发器参数,RIS反射,传输功率和延迟多普勒 (DD) 通道的容量最大化问题的制定和解决,使用放松算法.
- 集成离散的里叶变换扩散直角时频空间 (DFT-s-OTFS) 调制以支持DD频道并最大限度地降低峰值到平均功率比率 (PAPR).
主要成果:
- 拟议的ORIS辅助的基于DFT-s-OTFS的NOMA-MIMO VLC系统与ORIS辅助的OFDM相比显示出更高的性能.
- 在比特错误率 (BER),通道容量,光谱效率 (SE) 和安全率方面观察到显著的改善.
- 该系统有效地增强了空间多样性,优化了带宽,并改善了VLC-IoT环境中的功率分配.
结论:
- 开发的ORIS辅助的基于DFT-s-OTFS的NOMA-MIMO VLC系统为未来的高性能光学无线通信提供了一个有希望的解决方案.
- 这些发现为推进光学RIS辅助的MIMO-VLC技术提供了宝贵的见解,特别是在5G和6G应用中.
- 拟议的框架有效地解决了VLC的关键挑战,为更高效和更安全的光通信系统铺平了道路.
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