论文标题
单RF MIMO：从空间调制到基于元图的调制
Single-RF MIMO: From Spatial Modulation to Metasurface-Based Modulation
论文作者
论文摘要
在多输入多输出（MIMO）中，通常需要多个射频（RF）链来同时传输多个数据流。作为一种特殊的MIMO技术，空间调制（SM）用一个RF链激活一个传输天线，并利用活性天线的索引在每个时间插槽中进行信息传输。最近，可重新配置的元信息已成为一种有前途的技术，能够通过改变事件信号的幅度和/或相位来重新配置无线传播环境。在本文中，我们旨在通过将焦点从SM转移到基于Metasurface的调制，以实现单RF MIMO。具体而言，首先提出了SM和Metasurfaces的原理。在回顾了SM的演变之后，我们详细介绍了元图辅助的单RF MIMO的想法，并根据SM的显着变体讨论了它的某些实现。基于天线和基于跨表面的调制之间的比较是为了突出使用跨曲面的优势。我们最终在基于元图调制的背景下研究了研究挑战和机遇。
In multiple-input multiple-output (MIMO), multiple radio frequency (RF) chains are usually required to simultaneously transmit multiple data streams. As a special MIMO technology, spatial modulation (SM) activates one transmit antenna with one RF chain and exploits the index of the active antenna for information transfer at each time slot. Recently, reconfigurable metasurfaces have emerged as a promising technology that is able to reconfigure the wireless propagation environment by altering the amplitude and/or phase of the incident signal. In this article, we aim for the implementation of single-RF MIMO by shifting the focus from SM to metasurface-based modulation. Specifically, the principles of SM and metasurfaces are first presented. After reviewing the evolution of SM, we elaborate on the idea of metasurface-aided single-RF MIMO and discuss some implementations for it in line with notable variants of SM. A comparison between antenna-based and metasurface-based modulation is made to highlight the advantages of using metasurfaces. We finally investigate the research challenges and opportunities in the context of metasurface-based modulation.
