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 …

Generalized superimposed training scheme in IRS-assisted cell-free massive MIMO systems

N Garg, H Ge, T Ratnarajah - IEEE Journal of Selected Topics …, 2022 - ieeexplore.ieee.org
In this article, for a cell-free massive multi-input multi-output (MIMO) system assisted with
intelligent reflective surface (IRS) panels, a generalized superimposed pilot (GSP) training …

Max-min fairness optimization in uplink cell-free massive MIMO using meta-heuristics

F Conceição, CH Antunes, M Gomes… - IEEE Transactions …, 2022 - ieeexplore.ieee.org
One of the most promising technologies to be employed in beyond 5G networks is based on
the concept of cell-free (CF) massive MIMO, in which a predetermined set of access points …

Channel hardening in cell-free and user-centric massive MIMO networks with spatially correlated Ricean fading

AÁ Polegre, F Riera-Palou, G Femenias… - IEEE …, 2020 - ieeexplore.ieee.org
The irruption of the cell-free (CF) massive multiple-input multiple-output (MIMO) network
topology has meant taking one step further the concept of massive MIMO as a means to …

Quad-port UWB MIMO antenna based on LPF with vast rejection band

AS Abd El-Hameed, MG Wahab, NA Elshafey… - … -International Journal of …, 2021 - Elsevier
This manuscript introduces orthogonally polarized quad-element multi-input multi-output
(MIMO) antenna with improved isolation. The proposed design of a miniaturized volume of …

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 …

Short-term power constrained cell-free massive-MIMO over spatially correlated Ricean fading

G Femenias, F Riera-Palou… - IEEE Transactions …, 2020 - ieeexplore.ieee.org
This paper considers short-term power constrained cell-free massive multiple-input multiple-
output (MIMO) scenarios where a large set of multi-antenna access points (APs) provide …

On channel estimation and spectral efficiency for cell‐free massive MIMO with multi‐antenna access points considering spatially correlated channels

J Amadid, A Belhabib, A Khabba… - Transactions on …, 2022 - Wiley Online Library
Channel estimation (CE) and spectral efficiency (SE) are two processes that have a major
influence on system performance, especially in a more practical channel scenario with …

[图书][B] Cell-free massive MIMO: Scalability, signal processing and power control

G Interdonato - 2020 - books.google.com
The fifth generation of mobile communication systems (5G) is nowadays a reality. 5G
networks are been deployed all over the world, and the first 5G-capable devices (eg …

Performance analysis on cell-free massive MIMO with capacity-constrained fronthauls and variable-resolution ADCs

Y Xiong, S Sun, L Qin, N Wei, L Liu… - IEEE Systems …, 2021 - ieeexplore.ieee.org
In the recently proposed cell-free massive multiple-input and multiple-output (MIMO)
networks, the capacity of fronthaul links connecting all access points (APs) and a central …