MIMO Evolution Beyond 5G Through Reconfigurable Intelligent Surfaces and Fluid Antenna Systems
MIMO Evolution Beyond 5G Through Reconfigurable Intelligent Surfaces and Fluid Antenna Systems
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DOI：
10.1109/jproc.2022.3170247
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发表时间：
2022-05-06
影响因子：
20.6
通讯作者：
Juntti, Markku
中科院分区：
文献类型：
--
作者：
Shojaeifard, Arman;Wong, Kai-Kit;Juntti, Markku
随着大规模部署，多输入多输出（MIMO）系统继续将移动的通信带到新的高度，但不断增长的需求意味着需要超越MIMO，并追求下一个颠覆性的无线技术。可重构智能表面（RIS）被广泛认为是提供下一代飞跃的关键候选技术块。本文的第一部分提供了传统的基于反射的RIS技术的最新概述，它补充了现有的文献，包括有源和半有源RIS，以及与无小区大规模MIMO（CF mMIMO）的协同作用。然后，我们扩大范围来讨论表面波辅助RIS，它代表了利用超表面技术的不同设计维度。这不仅仅是一个被动反射器，还可以将表面用作智能传播介质，以实现卓越的无线电传播效率。本文的第三部分将注意力转向流体天线，这是一种新颖的天线技术，能够实现多种形式的可重新配置性，可以将联合收割机与RIS结合，以获得更大的容量、功率效率和可扩展性。本文最后讨论了MIMO、RIS和流体天线之间可以利用的潜在协同效应。
With massive deployment, multiple-input-multiple-output (MIMO) systems continue to take mobile communications to new heights, but the ever-increasing demands mean that there is a need to look beyond MIMO and pursue the next disruptive wireless technologies. Reconfigurable intelligent surface (RIS) is widely considered a key candidate technology block to provide the next generational leap. The first part of this article provides an updated overview of the conventional reflection-based RIS technology, which complements the existing literature to include active and semiactive RIS, and the synergies with cell-free massive MIMO (CF mMIMO). Then, we widen the scope to discuss the surface-wave-assisted RIS that represents a different design dimension in utilizing metasurface technologies. This goes beyond being a passive reflector and can use the surface as an intelligent propagation medium for superb radio propagation efficiency. The third part of this article turns the attention to the fluid antenna, a novel antenna technology that enables a diverse form of reconfigurability that can combine with RIS for ultrahigh capacity, power efficiency, and scalability. This article concludes with a discussion of the potential synergies that can be exploited between MIMO, RIS, and fluid antennas.
影响因子：
6.1
作者：
Darby SG;Moore MR;Friedlander TA;Schaffer DK;Reiserer RS;Wikswo JP;Seale KT
通讯作者：
Seale KT