Towards reliable communications in intelligent reflecting surface-aided cell-free MIMO systems

R Huang, VWS Wong - 2021 IEEE Global Communications …, 2021 - ieeexplore.ieee.org
Intelligent reflecting surface (IRS) and cell-free multiple-input multiple-output (CF-MIMO)
systems are two promising multi-antenna technologies for the fifth generation and beyond …

Sum rate maximization for multiuser MISO downlink with intelligent reflecting surface

S Wang, Q Li, SX Wu, J Lin - arXiv preprint arXiv:1912.09315, 2019 - arxiv.org
The intelligent reflecting surface (IRS) is a planar array with massive reconfigurable passive
elements, which can align the reflecting signals at the receivers via controlling the phase …

Maximizing spectral and energy efficiency in multi-user MIMO OFDM systems with RIS and hardware impairment

M Soleymani, I Santamaria, A Sezgin… - arXiv preprint arXiv …, 2024 - arxiv.org
An emerging technology to enhance the spectral efficiency (SE) and energy efficiency (EE)
of wireless communication systems is reconfigurable intelligent surface (RIS), which is …

Downlink Resource Optimization in Multi-STAR-RIS-Assisted MIMO Networks

Q Liu, J Zhao, F Shen, J Joung… - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
Simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STAR-RISs)
enables full-space manipulation of signal propagation. In this work, we consider a multi …

FlyReflect: Joint flying IRS trajectory and phase shift design using deep reinforcement learning

TP Truong, NN Dao, S Cho - IEEE Internet of Things Journal, 2022 - ieeexplore.ieee.org
Aerial access infrastructures have been considered a compulsory component of the sixth-
generation (6G) networks, where airborne vehicles play the role of mobile access points to …

Deep reinforcement learning based joint downlink beamforming and RIS configuration in RIS-aided MU-MISO systems under hardware impairments and imperfect …

B Saglam, D Gurgunoglu… - 2023 IEEE International …, 2023 - ieeexplore.ieee.org
We introduce a novel deep reinforcement learning (DRL) approach to jointly optimize
transmit beamforming and reconfigurable intelligent surface (RIS) phase shifts in a multiuser …

Intelligent Reflecting Surface Aided MISO Uplink Communication Network: Feasibility and SINR Optimization.

Y Liu, J Zhao, M Li, Q Wu - ArXiv, 2020 - europepmc.org
In this paper we consider the signal-to-interference-and-noise ratio (SINR) optimization
problem in the multi-user multi-input-single-output (MISO) uplink wireless network assisted …

Capacity region of intelligent reflecting surface aided wireless networks via active learning

Y Shi, M Fu, Y Zhou, Y Shi - 2021 IEEE Global …, 2021 - ieeexplore.ieee.org
Intelligent Reflecting Surface (IRS) is a promising technology that is able to manipulate the
wireless propagation channels via smartly adjusting the signal reflection. With continuous …

RIS-assisted beamforming for energy efficiency in multiuser downlink transmissions

JJL Quispe, TF Maciel, YCB Silva… - 2022 IEEE Globecom …, 2022 - ieeexplore.ieee.org
Reconfigurable intelligent surface (RIS) based reflections is a promising approach to
increase spectral efficiency (SE) and reduce power consumption of wireless …

DRL-Based Transmission Design for Distributed STAR-RIS-aided Communications

R Yadav, S Kurma, SK Singh, CP Li… - 2023 IEEE International …, 2023 - ieeexplore.ieee.org
In this work, we investigate the performance of distributed simultaneous transmitting and
reflecting (STAR) reconfigurable intelligent surface (RIS)-assisted downlink multiuser …