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Reconfigurable-Intelligent-Surface Empowered Wireless Communications: Challenges and Opportunities [article]

Xiaojun Yuan, Ying-Jun Angela Zhang, Yuanming Shi, Wenjing Yan, Hang Liu
2020 arXiv   pre-print
In this article, we focus on three fundamental physical-layer challenges for the incorporation of RISs into wireless networks, namely, channel state information acquisition, passive information transfer  ...  Reconfigurable intelligent surfaces (RISs) are regarded as a promising emerging hardware technology to improve the spectrum and energy efficiency of wireless networks by artificially reconfiguring the  ...  In [13] , the authors proposed a joint passive beamforming and information transfer (PBIT) technique for the RIS-aided communication systems, which aims to simultaneously transmit the RIS information  ... 
arXiv:2001.00364v3 fatcat:r46wtlmeibdzrj4xc2iqobctia

Intelligent Reflection Enabling Technologies for Integrated and Green Internet-of-Everything Beyond 5G: Communication, Sensing, and Security [article]

Wei Shi, Wei Xu, Xiaohu You, Chunming Zhao, Kejun Wei
2022 arXiv   pre-print
In this article, we provide a tutorial overview of the promising intelligent reflection communication (IRC) technologies, including reconfigurable intelligent surface (RIS) and ambient backscatter communication  ...  In IoE, there can be an ultra-massive number of smart devices of various types to be served, imposing multi-dimensional requirements on wireless communication, sensing, and security.  ...  IRC-Empowered Green Communications in Future IoE 1) RIS-Assisted Simultaneous Wireless Information and Power Transfer (SWIPT): As a combination of wireless information transfer (WIT) and wireless power  ... 
arXiv:2205.03182v1 fatcat:qbdf2ddg4bcp5nrvobhjpbjtae

Reconfigurable Intelligent Surfaces: Principles and Opportunities [article]

Yuanwei Liu, Xiao Liu, Xidong Mu, Tianwei Hou, Jiaqi Xu, Marco Di Renzo, Naofal Al-Dhahir
2021 arXiv   pre-print
In addition, we systematically survey existing designs for RIS-enhanced wireless networks encompassing performance analysis, information theory, and performance optimization perspectives.  ...  Furthermore, we survey existing research contributions that apply machine learning for tackling challenges in dynamic scenarios, such as random fluctuations of wireless channels and user mobility in RIS-enhanced  ...  The passive beamforming was designed by invoking the semidefinite Illustration of joint transmit and passive beamforming design.  ... 
arXiv:2007.03435v3 fatcat:pynhymbavfhgrmqnhzjndxnthq

Reconfigurable Intelligent Surfaces for Wireless Communications: Overview of Hardware Designs, Channel Models, and Estimation Techniques [article]

Mengnan Jian and George C. Alexandropoulos and Ertugrul Basar and Chongwen Huang and Ruiqi Liu and Yuanwei Liu and Chau Yuen
2022 arXiv   pre-print
RIS-empowered wireless networking approaches.  ...  Finally, we discuss the relevance of the RIS technology in the latest wireless communication standards, and highlight the current and future standardization activities for the RIS technology and the consequent  ...  Particularly, within the context of RIS wireless systems, researchers have focused on joint active and passive beamforming problems [9] , [28] , [29] , channel modeling under different conditions [  ... 
arXiv:2203.03176v1 fatcat:s7ok4pgo5bbxxgcbkzik7jpari

Reconfigurable intelligent surfaces for wireless communications: Overview of hardware designs, channel models, and estimation techniques

Mengnan Jian, George C. Alexandropoulos, Ertugrul Basar, Chongwen Huang, Ruiqi Liu, Yuanwei Liu, Chau Yuen
2022 Intelligent and Converged Networks  
RIS-empowered wireless networking approaches.  ...  Finally, we discuss the relevance of the RIS technology in the latest wireless communication standards, and highlight the current and future standardization activities for the RIS technology and the consequent  ...  Acknowledgment This work was supported by the EU H2020 Industrial Leadership Project (No. 101017011) and the Scientific and Technological Research Council of Turkey (TUBITAK) (No. 120E401).  ... 
doi:10.23919/icn.2022.0005 fatcat:o54tmkjpufey3fug57kdruy3x4

Federated Machine Learning for Intelligent IoT via Reconfigurable Intelligent Surface [article]

Kai Yang, Yuanming Shi, Yong Zhou, Zhanpeng Yang, Liqun Fu, Wei Chen
2020 arXiv   pre-print
However, the limited communication bandwidth is a key bottleneck of model aggregation for federated machine learning over radio channels.  ...  In this article, we shall develop an over-the-air computation based communication-efficient federated machine learning framework for intelligent IoT networks via exploiting the waveform superposition property  ...  The idea of joint communication and computation design approach for sensing via AirComp was first proposed for functional computation over wireless multiple access channels.  ... 
arXiv:2004.05843v1 fatcat:dlzrbcjqfzf5dmlvvf7w6hshuu

Reconfigurable Intelligent Surfaces: Potentials, Applications, and Challenges for 6G Wireless Networks [article]

Sarah Basharat, Syed Ali Hassan, Haris Pervaiz, Aamir Mahmood, Zhiguo Ding, Mikael Gidlund
2021 arXiv   pre-print
Finally, we present promising future research directions for realizing RIS-assisted networks in 6G communication.  ...  In this article, we provide a tutorial overview of RISs for sixth-generation (6G) wireless networks.  ...  This, therefore, calls for a sophisticated channel estimation and RIS passive beamforming design for RIS-assisted PLS under imperfect CSI. D.  ... 
arXiv:2107.05460v1 fatcat:ad72zlzyejdnjlrtgbjt2m4pxu

Smart and Secure Wireless Communications via Reflecting Intelligent Surfaces: A Short Survey [article]

Abdullateef Almohamad, Anas M. Tahir, Ayman Al-Kababji, Haji M. Furqan, Tamer Khattab, Mazen O. Hasna, Huseyin Arslan
2020 arXiv   pre-print
In this paper, we conduct a comprehensive literature review on the RIS-assisted PLS for future wireless communications.  ...  We start by introducing the basic concepts of RISs and their different applications in wireless communication networks and the most common PLS performance metrics.  ...  Within a related context, RIS-supported simultaneous wireless information and power transfer (SWIPT) is investigated in [39] .  ... 
arXiv:2006.14519v4 fatcat:dbrugoqwszbzlli55gfagszqwe

RIS Configuration, Beamformer Design, and Power Control in Single-Cell and Multi-Cell Wireless Networks [article]

Stefano Buzzi and Carmen D'Andrea and Alessio Zappone and Maria Fresia and Yong-Ping Zhang and Shulan Feng
2021 arXiv   pre-print
In this paper, a multiuser wireless network assisted by a RIS is studied and resource allocation algorithms are presented for several scenarios.  ...  Then, for the special case of a single-user system, three possible approaches are shown in order to optimize the Signal-to-Noise Ratio with respect to the beamformer used at the base station and to the  ...  Innovative and emerging RIS applications include multicell networks [15] , simultaneous wireless information and power transfer [16] , mobile edge computing networks [17] , multicast networks [18]  ... 
arXiv:2103.11165v1 fatcat:57bosidiwve2daipl4fz6jzuq4

UAVs with Reconfigurable Intelligent Surfaces: Applications, Challenges, and Opportunities [article]

Aly Sabri Abdalla, Talha Faizur Rahman, Vuk Marojevic
2020 arXiv   pre-print
This, typically passive radio frequency (RF) technology is emerging for indoor and outdoor use with the potential of making wireless communications more reliable in increasingly challenging radio environments  ...  We elaborate on several use cases, challenges, and future research opportunities for designing and optimizing wireless systems at low cost and with low energy footprint.  ...  Additionally, the beamforming optimization of the UAV will focus on providing aligned energy and information beams to provide more energy charging and information transfer capacity.  ... 
arXiv:2012.04775v1 fatcat:il5fk4mmpnagnmne5txi6jpwqm

Spectrum Learning-Aided Reconfigurable Intelligent Surfaces for 'Green' 6G Networks [article]

Bo Yang, Xuelin Cao, Chongwen Huang, Yong Liang Guan, Chau Yuen, Marco Di Renzo, Dusit Niyato, Merouane Debbah, Lajos Hanzo
2021 arXiv   pre-print
As a remedy, reconfigurable intelligent surfaces (RIS) have been proposed for improving the energy efficiency by beneficially reconfiguring the wireless propagation environment.  ...  This is because the signals impinging upon an RIS are typically contaminated by interfering signals which are usually dynamic and unknown.  ...  Emerging 6G Applications Empowered by RIS Conventional wireless communications are undergoing a significant transformation with the convergence of AI and 6G, evolving from the "Internet-of-information"  ... 
arXiv:2109.01287v1 fatcat:z4uk7phhpbacxebmqfoawrqmpi

Beyond 5G RIS mmWave Systems: Where Communication and Localization Meet [article]

Jiguang He and Fan Jiang and Kamran Keykhosravi and Joonas Kokkoniemi and Henk Wymeersch and Markku Juntti
2021 arXiv   pre-print
Then, we deal with the connection between localization and communications, from a separate and joint perspective.  ...  intelligent surface (RIS), integrated communication, localization, and sensing, and mmWave/THz communications.  ...  RIS joint active and passive beamforming, channel parameters extraction, and even MS localization.  ... 
arXiv:2109.07729v1 fatcat:ikcdkzjbl5fpthpkw6jmt63blm

Smart Radio Environments Empowered by Reconfigurable Intelligent Surfaces: How it Works, State of Research, and Road Ahead [article]

Marco Di Renzo, Alessio Zappone, Merouane Debbah, Mohamed-Slim Alouini, Chau Yuen, Julien de Rosny, Sergei Tretyakov
2020 arXiv   pre-print
Maxwell's mathematical theories of electromagnetism, and reporting pragmatic guidelines and recipes for employing appropriate physics-based models of metasurfaces in wireless communications.  ...  What are the most suitable uses and applications of reconfigurable intelligent surfaces in wireless networks? What are the most promising smart radio environments for wireless applications?  ...  In [168] , the authors investigate the problem of passive beamforming and information transfer in the context of an RIS-aided MIMO system.  ... 
arXiv:2004.09352v1 fatcat:ncsxqispbrcdrcpyrqvja3ie3m

The Interplay of Reconfigurable Intelligent Surfaces and Mobile Edge Computing in Future Wireless Networks: A Win-Win Strategy to 6G [article]

Mithun Mukherjee and Vikas Kumar and Mian Guo and Daniel Benevides da Costa and Ertugrul Basar and Zhiguo Ding
2021 arXiv   pre-print
Reconfigurable intelligent surface (RIS)-empowered communication is being considered as an enabling technology for sixth generation (6G) wireless networks.  ...  The key idea of RIS-assisted communication is to enhance the capacity, coverage, energy efficiency, physical layer security, and many other aspects of modern wireless networks.  ...  tasks for future wireless communication systems.  ... 
arXiv:2106.11784v1 fatcat:hhyhdeijtvcofma3vz2nnzvnza

Hybrid Beamforming for RIS-Empowered Multi-hop Terahertz Communications: A DRL-based Method [article]

Chongwen Huang, Zhaohui Yang, George C. Alexandropoulos, Kai Xiong, Li Wei, Chau Yuen, Zhaoyang Zhang
2020 arXiv   pre-print
Wireless communication in the TeraHertz band (0.1--10 THz) is envisioned as one of the key enabling technologies for the future six generation (6G) wireless communication systems.  ...  Furthermore, it is also shown that our proposed DRL-based method is a state-of-the-art method to solve the NP-bard beamforming problem, especially when the signals at RIS-empowered THz communication networks  ...  Fig. 1 . 1 The RIS-based multi-hop for THz communications and proposed practical RIS-based hybrid beamforming architecture.  ... 
arXiv:2009.09380v1 fatcat:qghed2g2fnahdmc5d7arhkbbxa
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