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Reconfigurable Intelligent Surface (RIS) Assisted Wireless Coverage Extension: RIS Orientation and Location Optimization [article]

Shuhao Zeng, Hongliang Zhang, Boya Di, Zhu Han, Lingyang Song
2020 arXiv   pre-print
coverage by optimizing the RIS orientation and horizontal distance.  ...  Recently, reconfigurable intelligent surfaces (RIS) have attracted a lot of attention due to their capability of extending cell coverage by reflecting signals toward the receiver.  ...  However, existing works only utilized the RIS for coverage extension given the RIS location, but how to deploy the RIS to further maximize the cell coverage has not been studied yet.  ... 
arXiv:2009.08038v1 fatcat:6lsxuz2rjjf6jdcn53qpam2dcu

Reconfigurable Intelligent Surfaces for Future Wireless Networks: A Channel Modeling Perspective [article]

E. Basar, I. Yildirim
2021 arXiv   pre-print
While the researchers have set their sights on future wireless networks of 2030, communications through reconfigurable intelligent surfaces (RISs) appears as one of the potential enabling technologies  ...  Potential future research directions are also discussed to bridge the gap between the theory and practice of RIS-empowered systems towards their standardization for 6G wireless networks.  ...  RECONFIGURABLE INTELLIGENT SURFACES: HOW DO THEY WORK?  ... 
arXiv:2008.01448v4 fatcat:q2wei5j6njh2tcjmqj37wk6wwe

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
the capacity and coverage of wireless networks by smartly reconfiguring the wireless propagation environment.  ...  Reconfigurable intelligent surfaces (RISs), also known as intelligent reflecting surfaces (IRSs), or large intelligent surfaces (LISs), have received significant attention for their potential to enhance  ...  Index Terms 6G, intelligent reflecting surface (IRS), machine learning, performance optimization, reconfigurable intelligent surface (RIS), wireless networks I.  ... 
arXiv:2007.03435v3 fatcat:pynhymbavfhgrmqnhzjndxnthq

Wireless Communications Through Reconfigurable Intelligent Surfaces [article]

Ertugrul Basar, Marco Di Renzo, Julien de Rosny, Merouane Debbah, Mohamed-Slim Alouini, Rui Zhang
2019 arXiv   pre-print
intelligent surfaces in 6G and beyond wireless networks.  ...  This article also explores theoretical performance limits of reconfigurable intelligent surface-assisted communication systems using mathematical techniques and elaborates on the potential use cases of  ...  In the recent period, a brand-new technology was brought to the attention of the wireless research community: reconfigurable intelligent surfaces (RISs).  ... 
arXiv:1906.09490v2 fatcat:g37e2e7lnbgz7lhubkb3xk3wnu

Wireless Communications Through Reconfigurable Intelligent Surfaces

Ertugrul Basar, Marco Di Renzo, Julien de Rosny, Merouane Debbah, Mohamed-Slim Alouini, Rui Zhang
2019 IEEE Access  
intelligent surfaces in 6G and beyond wireless networks.  ...  INDEX TERMS 6G, large intelligent surfaces, meta-surfaces, reconfigurable intelligent surfaces, smart reflect-arrays, software-defined surfaces, wireless communications, wireless networks.  ...  In the follow-up study [79] , the author considered the concept of intelligent surfaces-assisted IM by proposing RIS-SM and RIS-SSK schemes.  ... 
doi:10.1109/access.2019.2935192 fatcat:6pjbpzbisnduxfykkelv42suhi

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

Aly Sabri Abdalla, Talha Faizur Rahman, Vuk Marojevic
2020 arXiv   pre-print
A reconfigurable intelligent surface (RIS) is a metamaterial that can be integrated into walls and influence the propagation of electromagnetic waves.  ...  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.  ...  The reconfigurable intelligent surface (RIS) is an emerging technology that has the ability to define new wireless transmission and propagation patterns and control the communications channel.  ... 
arXiv:2012.04775v1 fatcat:il5fk4mmpnagnmne5txi6jpwqm

Capacity Improvement in Reconfigurable Intelligent Surface Assisted MIMO Communications

Jun Yang, Yijian Chen, Mengnan Jian, Jianwu Dou, Min Fang
2021 IEEE Access  
The optimization of RIS orientation and location for coverage extension was presented in [31] but a full picture of the capacity distribution within the coverage area was not given.  ...  INTRODUCTION R ECONFIGURABLE intelligent surface (RIS), also known as intelligent reflecting surface (IRS) [1] , large intelligent surface (LIS) [2] , among others [3] , [4] , has become a hot topic  ... 
doi:10.1109/access.2021.3113917 fatcat:2arhmz35zjb57a4yp3s7qdmfga

Non-terrestrial Communications Assisted by Reconfigurable Intelligent Surfaces [article]

Jia Ye, Jingping Qiao, Abla Kammoun, Mohamed-Slim Alouini
2021 arXiv   pre-print
Fortunately, the recent technology reconfigurable intelligent surface (RIS) is expected to be one of the most cost-efficient solutions to address such issues.  ...  , and the classification of RANTNs including RIS-assisted air-to-ground (A2G)/ground-to-air (G2A), ARIS-assisted ground-to-ground (G2G), and RIS-assisted air-to-air (A2A) communications.  ...  Frameworks of RANTNs Reconfigurable Intelligent surface System models of RANTNs Terrestrial RIS Aerial RIS Comparisons RIS-assisted A2G/G2A Communications ARIS-assisted G2G Communication  ... 
arXiv:2109.00876v1 fatcat:gukzusg4rzeevcfzdl2ff7yxdm

Planning Mm-Wave Access Networks With Reconfigurable Intelligent Surfaces [article]

Eugenio Moro, Ilario Filippini, Antonio Capone, Danilo De Donno
2021 arXiv   pre-print
Recently introduced Reconfigurable Intelligent Surfaces (RISs) can enhance the coverage of mm-Wave communications by improving the received signal power and offering an alternative radio path when the  ...  Using well-established planning methods, we have developed a new optimization model where RISs can be installed alongside base stations to assist the communications, creating what we have defined as Smart  ...  An SRC consists of a radio link assisted by an intelligent surface and, in our planning model, SRCs can be established alongside traditional connections between UEs and base stations to increase the coverage  ... 
arXiv:2105.11755v2 fatcat:vsb4pjntzzgy7lu2533p4hbnbq

Machine Learning Approaches for Reconfigurable Intelligent Surfaces: A Survey

K. M. Faisal, Wooyeol Choi
2022 IEEE Access  
Reconfigurable intelligent surfaces (RISs) have attracted considerable interest because of their potential to improve wireless network capacity and coverage by intelligently changing the wireless propagation  ...  Machine learning (ML) is an effective method for maximizing the possible advantages of RIS-assisted communication systems, particularly when the computational complexity of operating and deploying RIS  ...  Electromagnetic wave-based activities of a reconfigurable intelligent surface. FIGURE 2 . 2 FIGURE 2.  ... 
doi:10.1109/access.2022.3157651 fatcat:tgieazlrcvestaqpimbr5s5jaq

Reconfigurable Intelligent Surfaces for 5G and beyond Wireless Communications: A Comprehensive Survey

Teena Sharma, Abdellah Chehri, Paul Fortier
2021 Energies  
This paper presents a comprehensive literature review on reconfigurable intelligent surfaces (RISs) and assisted application areas.  ...  Furthermore, the current research activities in the evolving field of wireless networks operated by RIS are reviewed and discussed thoroughly.  ...  Acknowledgments: The authors thanks to the anonymous reviewer and editors for their constructive comments. Conflicts of Interest: The authors declare no conflict of interests.  ... 
doi:10.3390/en14248219 doaj:cd2fcec8df7c477faf7ddd4d897184f9 fatcat:7ntjkk4znneplmpfs3tkcm32sq

Reconfigurable Intelligent Surface Optimal Placement in Millimeter-Wave Networks [article]

Konstantinos Ntontin, Alexandros-Apostolos A. Boulogeorgos, Dimitrios Selimis, Fotis Lazarakis, Angeliki Alexiou, Symeon Chatzinotas
2021 arXiv   pre-print
This work discusses the optimal reconfigurable intelligent surface placement in highly-directional millimeter wave links.  ...  In particular, we present a novel system model that takes into account the relationship between the transmission beam footprint at the RIS plane and the RIS size.  ...  ACKNOWLEDGEMENTS The authors would like to cordially thank the associate editor and anonymous reviewers, whose comments and suggestions have led to a substantial improvement of this work.  ... 
arXiv:2011.09949v2 fatcat:m4kgwa6e3vetrpu3humrytl2gm

Reconfigurable Intelligent Surface Optimal Placement in Millimeter-Wave Networks

Konstantinos Ntontin, AlexandrosnApostolos A. Boulogeorgos, Dimitrios Selimis, Fotis Lazarakis, Angeliki Alexiou, Symeon Chatzinotas
2021 IEEE Open Journal of the Communications Society  
This work discusses the optimal reconfigurable intelligent surface placement in highly-directional millimeter wave links.  ...  In particular, we present a novel system model that takes into account the relationship between the transmission beam footprint at the RIS plane and the RIS size.  ...  ACKNOWLEDGEMENTS The authors would like to cordially thank the associate editor and anonymous reviewers, whose comments and suggestions have led to a substantial improvement of this work.  ... 
doi:10.1109/ojcoms.2021.3068790 fatcat:heiubsoj5fd4blmfmq7cdbhz2a

Reconfigurable Intelligent Surfaces for N-LOS Radar Surveillance [article]

Augusto Aubry, Antonio De Maio, Massimo Rosamilia
2021 arXiv   pre-print
This paper deals with the use of Reconfigurable Intelligent Surfaces (RISs) for radar surveillance in Non-Line Of Sight (N-LOS) scenarios.  ...  Then, the specific radar equation (including the RIS effect) is developed to manage the coverage requirements in the challenging region where the LOS is not present.  ...  INTRODUCTION Reconfigurable Intelligent Surfaces (RISs) are a novel and promising technology which is receiving growing interest in recent years especially for next generation communication (e.g., beyond  ... 
arXiv:2104.00456v2 fatcat:f3d4hccdyzhi7dlwk2zxryu7l4

Reconfigurable Intelligent Surface-Assisted Backscatter Communication: A New Frontier for Enabling 6G IoT Networks [article]

Sarah Basharat, Syed Ali Hassan, Aamir Mahmood, Zhiguo Ding, Mikael Gidlund
2021 arXiv   pre-print
In this regard, reconfigurable intelligent surfaces (RISs) have come to the forefront to transform the wireless propagation environment into a fully controllable and customizable space in a cost-effective  ...  In this article, for the first time in the open literature, we provide a tutorial overview of RIS-assisted BackCom (RIS-BackCom) systems.  ...  Hence, in this regard, reconfigurable intelligent surfaces (RISs), also known as intelligent reflecting surfaces (IRSs), have come to the forefront to improve the propagation conditions by passive signal  ... 
arXiv:2107.07813v1 fatcat:bwxg46tj3fbqxiwhu6l2jjzdzy
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