论文标题
大型智能表面（LIS）的通信：新功能和系统布局
Large intelligent surface (LIS)-based communications: New features and system layouts
论文作者
论文摘要
大型智能表面（LIS）的通信的概念最近引起了越来越多的研究注意力，其中LI被视为天线阵列，其整个表面积可用于无线电信号传递和接收。为了提供对基于LIS的通信的基本理解，本文研究了基于LIS的沟通的上行链路性能与匹配的滤波器在有线渠道的存在下。我们首先研究了LIS引入的新功能。特别是，理论上呈现和表征了阵列增益，空间分辨率和干扰抑制能力。然后，我们研究了两个可能的LIS系统布局，即集中式LIS（C-LIS）和分布式LIS（D-LIS），并提出了一种用户关联方案，旨在最大化最低用户频谱效率（SE）。模拟结果比较了两个系统布局之间可实现的SE。我们观察到，拟议的用户协会算法显着提高了D-LIS的性能，并在它的帮助下，在大多数考虑的情况下，在C-LIS中，D-LIS中可实现的SE胜过。
The concept of large intelligent surface (LIS)-based communication has recently attracted increasing research attention, where a LIS is considered as an antenna array whose entire surface area is available for radio signal transmission and reception. In order to provide a fundamental understanding of LIS-based communication, this paper studies the uplink performance of LIS-based communication with matched filtering in the presence of a line-of-sight channel. We first study the new features introduced by LIS. In particular, the array gain, spatial resolution, and the capability of interference suppression are theoretically presented and characterized. Then, we study two possible LIS system layouts, i.e., centralized LIS (C-LIS) and distributed LIS (D-LIS), and propose a user association scheme aiming to maximize the minimum user spectral efficiency (SE). Simulation results compare the achievable SE between two system layouts. We observe that the proposed user association algorithm significantly improves the performance of D-LIS, and with the help of it, the per-user achievable SE in D-LIS outperforms that in C-LIS in most considered scenarios.
