论文标题
速率分类多次访问：MISO VLC通道中的Noma和SDMA统一
Rate-Splitting Multiple Access: Unifying NOMA and SDMA in MISO VLC Channels
论文作者
论文摘要
连接设备的扩散增加需要范式转向下一代无线系统的创新技术的开发。但是，主要的挑战之一是由于近年来空前的宽带渗透率，频谱稀缺。可见光通信（VLC）最近已成为实现高速短距离通信的可能解决方案。但是，VLC系统遭受了几个局限性，包括发光二极管的调制带宽有限。因此，已经考虑了VLC网络的几种多个多个访问技术（MA），例如空间划分多重访问（SDMA）和非正交多访问（NOMA）。尽管他们有希望的多重收益，但它们的性能还是有限的。在本文中，我们首先概述了VLC系统中使用的关键MA技术。然后，我们引入了速率分类的多个访问（RSMA），该访问最初是针对RF系统提出的，并在VLC系统中讨论了其潜力。通过对基于RSMA的两次使用方案的系统建模和模拟，我们说明了RSMA在概括Noma和SDMA方面的灵活性，以及其在VLC中的加权总和（WSR）方面的优势。最后，我们讨论挑战，开放问题和研究方向，这将使RSMA在VLC中实现。
The increased proliferation of connected devices requires a paradigm shift towards the development of innovative technologies for the next generation of wireless systems. One of the key challenges, however, is the spectrum scarcity, owing to the unprecedented broadband penetration rate in recent years. Visible light communications (VLC) has recently emerged as a possible solution to enable high-speed short-range communications. However, VLC systems suffer from several limitations, including the limited modulation bandwidth of light-emitting diodes. Consequently, several multiple access techniques (MA), e.g., space-division multiple access (SDMA) and non-orthogonal multiple access (NOMA), have been considered for VLC networks. Despite their promising multiplexing gains, their performance is somewhat limited. In this article, we first provide an overview of the key MA technologies used in VLC systems. Then, we introduce rate-splitting multiple access (RSMA), which was initially proposed for RF systems and discuss its potentials in VLC systems. Through system modeling and simulations of an RSMA-based two-use scenario, we illustrate the flexibility of RSMA in generalizing NOMA and SDMA, as well as its superiority in terms of weighted sum rate (WSR) in VLC. Finally, we discuss challenges, open issues, and research directions, which will enable the practical realization of RSMA in VLC.
