Intelligent Reflecting Surfaces for Enhanced NOMA-based Visible Light Communications
Intelligent Reflecting Surfaces for Enhanced NOMA-based Visible Light Communications
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DOI：
10.1109/icc45855.2022.9838853
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
Hanaa Abumarshoud;Bassant Selim;M. Tatipamula;H. Haas
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文献类型：
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作者：
Hanaa Abumarshoud;Bassant Selim;M. Tatipamula;H. Haas
新兴的智能反射表面（IRS）技术在可见光通信（VLC）系统中引入了受控光传播的潜力。这一概念为新的应用打开了大门，在这些应用中，通道本身可以被改变以实现特定的关键性能指标。在本文中，第一次在公开文献中，我们调查的作用，IRS可以发挥在VLC系统采用非正交多址（NOMA）的链路可靠性提高。我们提出了一个框架的NOMA和IRS参数的联合优化，并表明它提供了显着的增强链路的可靠性。例如，与固定功率分配和固定IRS反射系数下的10 - 2的错误平层相比，使用所提出的框架，第一解码顺序中的NOMA用户的比特错误率被降低到10 - 6的数量级。当VLC通道受到阻塞和随机器件取向的影响时，这种增强甚至更加明显。
The emerging intelligent reflecting surface (IRS) technology introduces the potential of controlled light propagation in visible light communication (VLC) systems. This concept opens the door for new applications in which the channel itself can be altered to achieve specific key performance indicators. In this paper, for the first time in the open literature, we investigate the role that IRSs can play in enhancing the link reliability in VLC systems employing non-orthogonal multiple access (NOMA). We propose a framework for the joint optimisation of the NOMA and IRS parameters and show that it provides significant enhancements in link reliability. For example, the bit-error-rate of the NOMA user in the first decoding order is reduced to the order of 10−6 using the proposed framework compared to an error floor of 10−2 under fixed power allocation and fixed IRS reflection coefficients. The enhancement is even more pronounced when the VLC channel is subject to blockage and random device orientation.