An overview of signal processing techniques for RIS/IRS-aided wireless systems

C Pan, G Zhou, K Zhi, S Hong, T Wu… - IEEE Journal of …, 2022 - ieeexplore.ieee.org
In the past as well as present wireless communication systems, the wireless propagation
environment is regarded as an uncontrollable black box that impairs the received signal …

A survey on channel estimation and practical passive beamforming design for intelligent reflecting surface aided wireless communications

B Zheng, C You, W Mei, R Zhang - … Communications Surveys & …, 2022 - ieeexplore.ieee.org
Intelligent reflecting surface (IRS) has emerged as a key enabling technology to realize
smart and reconfigurable radio environment for wireless communications, by digitally …

Channel estimation for extremely large-scale MIMO: Far-field or near-field?

M Cui, L Dai - IEEE Transactions on Communications, 2022 - ieeexplore.ieee.org
Extremely large-scale multiple-input-multiple-output (XL-MIMO) is promising to meet the
high rate requirements for future 6G. To realize efficient precoding, accurate channel state …

Intelligent reflecting surface-aided wireless communications: A tutorial

Q Wu, S Zhang, B Zheng, C You… - IEEE transactions on …, 2021 - ieeexplore.ieee.org
Intelligent reflecting surface (IRS) is an enabling technology to engineer the radio signal
propagation in wireless networks. By smartly tuning the signal reflection via a large number …

Multi-hop RIS-empowered terahertz communications: A DRL-based hybrid beamforming design

C Huang, Z Yang, GC Alexandropoulos… - IEEE Journal on …, 2021 - ieeexplore.ieee.org
Wireless communication in the TeraHertz band (0.1-10 THz) is envisioned as one of the key
enabling technologies for the future sixth generation (6G) wireless communication systems …

Physics-based modeling and scalable optimization of large intelligent reflecting surfaces

M Najafi, V Jamali, R Schober… - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
Intelligent reflecting surfaces (IRSs) have the potential to transform wireless communication
channels into smart reconfigurable propagation environments. To realize this new paradigm …

Channel estimation with reconfigurable intelligent surfaces—A general framework

AL Swindlehurst, G Zhou, R Liu, C Pan… - Proceedings of the …, 2022 - ieeexplore.ieee.org
Optimally extracting the advantages available from reconfigurable intelligent surfaces (RISs)
in wireless communications systems requires estimation of the channels to and from the RIS …

Aerial intelligent reflecting surface: Joint placement and passive beamforming design with 3D beam flattening

H Lu, Y Zeng, S Jin, R Zhang - IEEE Transactions on Wireless …, 2021 - ieeexplore.ieee.org
Intelligent reflecting surface (IRS) is a promising technology to reconfigure wireless
channels, which brings a new degree of freedom for the design of future wireless networks …

Energy efficiency and spectral efficiency tradeoff in RIS-aided multiuser MIMO uplink transmission

L You, J Xiong, DWK Ng, C Yuen… - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
The emergence of reconfigurable intelligent surfaces (RISs) enables us to establish
programmable radio wave propagation that caters for wireless communications, via …

Reconfigurable-intelligent-surface empowered wireless communications: Challenges and opportunities

X Yuan, YJA Zhang, Y Shi, W Yan… - IEEE wireless …, 2021 - ieeexplore.ieee.org
Reconfigurable intelligent surfaces (RISs) are regarded as a promising emerging hardware
technology to improve the spectrum and energy efficiency of wireless networks by artificially …