RIS-aided cell-free massive MIMO systems for 6G: Fundamentals, system design, and applications

E Shi, J Zhang, H Du, B Ai, C Yuen… - Proceedings of the …, 2024 - ieeexplore.ieee.org
An introduction of intelligent interconnectivity for people and things has posed higher
demands and more challenges for sixth-generation (6G) networks, such as high spectral …

Robust beamforming design for RIS-aided cell-free systems with CSI uncertainties and capacity-limited backhaul

J Yao, J Xu, W Xu, DWK Ng, C Yuen… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
In this paper, we consider the robust beamforming design in a reconfigurable intelligent
surface (RIS)-aided cell-free (CF) system considering the channel state information (CSI) …

STAR-RIS assisted cell-free massive MIMO system under spatially-correlated channels

A Papazafeiropoulos, HQ Ngo… - IEEE Transactions …, 2023 - ieeexplore.ieee.org
This paper investigates the performance of downlink simultaneous transmitting and
reflecting reconfigurable intelligent surface (STAR-RIS)-assisted cell-free (CF) massive …

Digital twin-aided learning for managing reconfigurable intelligent surface-assisted, uplink, user-centric cell-free systems

Y Cui, T Lv, W Ni, A Jamalipour - IEEE Journal on Selected …, 2023 - ieeexplore.ieee.org
This paper puts forth a new, reconfigurable intelligent surface (RIS)-assisted, uplink, user-
centric cell-free (UCCF) system managed with the assistance of a digital twin (DT) …

Achievable rate analysis for multi-cell RIS-aided massive MIMO with statistical CSI-based optimizations

D Gunasinghe, GAA Baduge - IEEE Transactions on Wireless …, 2023 - ieeexplore.ieee.org
The achievable rates and computationally efficient statistical channel state information (CSI)
based phase-shift and transmit power optimization techniques are investigated for multi-cell …

Channel reciprocity attacks using intelligent surfaces with non-diagonal phase shifts

H Wang, Z Han, AL Swindlehurst - IEEE Open Journal of the …, 2024 - ieeexplore.ieee.org
While reconfigurable intelligent surface (RIS) technology has been shown to provide
numerous benefits to wireless systems, in the hands of an adversary such technology can …

Impact of phase noise in downlink STAR-RIS-aided massive MIMO systems

H Ge, A Papazafeiropoulos… - IEEE Communications …, 2023 - ieeexplore.ieee.org
In this work, we investigate the effect of phase noise in downlink simultaneously transmitting
and reflecting reconfigurable intelligent surface (STAR-RIS)-aided massive multiple-input …

Cell-free massive MIMO SWIPT with beyond diagonal reconfigurable intelligent surfaces

TD Hua, M Mohammadi, HQ Ngo… - arXiv preprint arXiv …, 2024 - arxiv.org
This paper investigates the integration of beyond-diagonal reconfigurable intelligent
surfaces (BD-RISs) into cell-free massive multiple-input multiple-output (CF-mMIMO) …

Phase shift design for RIS-aided cell-free massive MIMO with improved differential evolution

T Van Chien, CV Le, HTT Binh, HQ Ngo… - IEEE Wireless …, 2023 - ieeexplore.ieee.org
This letter proposes a novel phase shift design for cell-free massive multiple-input and
multiple-output (MIMO) systems assisted by reconfigurable intelligent surface (RIS), which …

Performance of Multi-RIS-aided Cell-Free Massive MIMO: Do More RISs Always Help?

B Al-Nahhas, M Obeed, A Chaaban… - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
Cell free (CF) massive multiple-input multiple-output (mMIMO) is a promising technology in
realizing beyond fifth generation (B5G) networks. Massive deployment of access points …