论文标题
用户以用户为中心的混合动力VLC/RF无单元的大型MIMO系统中的用户协会
User Association in User-Centric Hybrid VLC/RF Cell-Free Massive MIMO Systems
论文作者
论文摘要
所有通信系统中的一个连续目标是增强用户体验并为他们提供最高的数据速率。最近，已经考虑了无细胞大型MIMO（CF-MIMO）系统的概念，以增强仅射频（RF）或可见光通信（VLC）技术的系统的性能。在本文中，提出了混合VLC/RF无单元的大型MIMO系统，其中无RF单元网络和无VLC单元网络共存以服务用户。这个想法是利用每个网络的好处，平衡旨在最大化系统总和率的负载。使用零孔（ZF）预码方案评估系统。提出了两种用户关联算法将用户分配给VLC或RF网络。此外，提出并评估两种以用户为中心的聚类方法。仿真结果表明，所提出的关联算法在总和率方面显着优于用户的随机网络关联。与独立的无细胞网络相比，结果还显示了拟议系统的巨大潜力。
A continuous goal in all communication systems is to enhance the users experience and provide them with the highest possible data rates. Recently, the concept of cell-free massive MIMO (CF-mMIMO) systems has been considered to enhance the performance of systems that operate merely with Radio Frequency (RF) or visible light communication (VLC) technologies. In this paper, a hybrid VLC/RF cell-free massive MIMO system is proposed where an RF cell-free network and a VLC cell-free network coexist to serve users. The idea is to utilize the benefits of each network and balance the load aiming at maximizing the system's sum-rate. The system is evaluated using zero-forcing (ZF) precoding scheme. Two user association algorithms are proposed to assign users to either the VLC or the RF networks. In addition, two user-centric clustering approaches are proposed and evaluated. Simulation results show that the proposed association algorithms significantly outperform a random network association of users in terms of sum-rate. Results also show great potential for the proposed system compared to standalone cell-free networks.
