A review of energy efficiency and power control schemes in ultra-dense cell-free massive MIMO systems for sustainable 6G wireless communication

AL Imoize, HI Obakhena, FI Anyasi, SN Sur - Sustainability, 2022 - mdpi.com
The traditional multiple input multiple output (MIMO) systems cannot provide very high
Spectral Efficiency (SE), Energy Efficiency (EE), and link reliability, which are critical to …

Multiple RISs assisted cell-free networks with two-timescale CSI: Performance analysis and system design

X Gan, C Zhong, C Huang, Z Yang… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
Reconfigurable intelligent surface (RIS) can be employed in a cell-free system to create
favorable propagation conditions from base stations (BSs) to users via configurable …

Multiattribute access selection algorithm for heterogeneous wireless networks based on fuzzy network attribute values

X Guo, MH Omar, KM Zaini, G Liang, M Lin… - IEEE Access, 2022 - ieeexplore.ieee.org
An important feature of the wireless network scenario is that there are multi-radio access
technologies in the same area, and the signal coverage of these networks overlaps each …

Joint access configuration and beamforming for cell-free massive MIMO systems with dynamic TDD

S Fukue, H Iimori, GTF De Abreu, K Ishibashi - IEEE Access, 2022 - ieeexplore.ieee.org
We address the trade-off between system throughput and user equipment (UE) fairness in
dynamic time division duplex (TDD) cell-free (CF)-massive multiple-input multiple-output …

Adaptive LLR-based APs selection for grant-free random access in cell-free massive MIMO

RB Di Renna, RC de Lamare - 2022 IEEE Globecom …, 2022 - ieeexplore.ieee.org
This paper presents an iterative detection and de-coding scheme along with an adaptive
strategy to improve the selection of access points (APs) in a grant-free uplink cell-free …

Uplink signal detection for scalable cell-free massive MIMO systems with robustness to rate-limited fronthaul

K Ando, H Iimori, T Takahashi, K Ishibashi… - IEEE …, 2021 - ieeexplore.ieee.org
We consider the problem of uplink signal detection in scalable cell-free mMIMO (CF-
mMIMO) systems subject to limited fronthaul link capacity and highly correlated channel …

Iterative Detection and Decoding With Log-Likelihood Ratio Based Access Point Selection for Cell-Free MIMO Systems

RB Di Renna, RC de Lamare - IEEE Transactions on Vehicular …, 2023 - ieeexplore.ieee.org
This paper proposes an iterative detection and decoding (IDD) scheme and an approach to
improve the selection of access points (APs) in uplink cell-free massive multiple-antenna …

Decentralized joint pilot and data power control based on deep reinforcement learning for the uplink of cell-free systems

IM Braga, RP Antonioli, G Fodor… - IEEE Transactions …, 2022 - ieeexplore.ieee.org
While the problem of jointly controlling the pilot-and-data power in cell-based systems has
been extensively studied, this problem is difficult to solve in cell-free systems due to two …

Scalable user-centric distributed massive MIMO systems with limited processing capacity

MMM Freitas, DD Souza… - ICC 2023-IEEE …, 2023 - ieeexplore.ieee.org
This paper investigates the performance of scalable user-centric (UC) distributed massive
multiple-input multiple-output (D-mMIMO) systems, widely known in the literature as cell-free …

Partial cooperative zero-forcing decoding for uplink cell-free massive MIMO

X Wang, J Cheng, C Zhai… - IEEE Internet of Things …, 2021 - ieeexplore.ieee.org
We propose a partial cooperative zero-forcing (PCZF) decoding scheme for the uplink cell-
free massive MIMO system, wherein the neighboring access points (APs) around each user …