6G wireless communications networks: A comprehensive survey

M Alsabah, MA Naser, BM Mahmmod… - Ieee …, 2021‏ - ieeexplore.ieee.org
The commercial fifth-generation (5G) wireless communications networks have already been
deployed with the aim of providing high data rates. However, the rapid growth in the number …

A survey on 5G radio access network energy efficiency: Massive MIMO, lean carrier design, sleep modes, and machine learning

D López-Pérez, A De Domenico… - … Surveys & Tutorials, 2022‏ - ieeexplore.ieee.org
Cellular networks have changed the world we are living in, and the fifth generation (5G) of
radio technology is expected to further revolutionise our everyday lives by enabling a high …

Prospective multiple antenna technologies for beyond 5G

J Zhang, E Björnson, M Matthaiou… - IEEE Journal on …, 2020‏ - ieeexplore.ieee.org
Multiple antenna technologies have attracted much research interest for several decades
and have gradually made their way into mainstream communication systems. Two main …

Massive MIMO networks: Spectral, energy, and hardware efficiency

E Björnson, J Hoydis… - Foundations and Trends® …, 2017‏ - nowpublishers.com
Massive multiple-input multiple-output (MIMO) is one of the most promising technologies for
the next generation of wireless communication networks because it has the potential to …

Cell-free massive MIMO versus small cells

HQ Ngo, A Ashikhmin, H Yang… - IEEE Transactions …, 2017‏ - ieeexplore.ieee.org
A Cell-Free Massive MIMO (multiple-input multiple-output) system comprises a very large
number of distributed access points (APs), which simultaneously serve a much smaller …

On the total energy efficiency of cell-free massive MIMO

HQ Ngo, LN Tran, TQ Duong… - IEEE Transactions …, 2017‏ - ieeexplore.ieee.org
We consider the cell-free massive multiple-input multiple-output (MIMO) downlink, where a
very large number of distributed multiple-antenna access points (APs) serve many single …

Reconfigurable intelligent surface-assisted cell-free massive MIMO systems over spatially-correlated channels

T Van Chien, HQ Ngo, S Chatzinotas… - IEEE Transactions …, 2021‏ - ieeexplore.ieee.org
Cell-Free Massive multiple-input multiple-output (MIMO) and reconfigurable intelligent
surface (RIS) are two promising technologies for application to beyond-5G networks. This …

Ultra-dense networks: A survey

M Kamel, W Hamouda… - … Communications surveys & …, 2016‏ - ieeexplore.ieee.org
The exponential growth and availability of data in all forms is the main booster to the
continuing evolution in the communications industry. The popularization of traffic-intensive …

Modeling and analyzing millimeter wave cellular systems

JG Andrews, T Bai, MN Kulkarni… - IEEE Transactions …, 2016‏ - ieeexplore.ieee.org
We provide a comprehensive overview of mathematical models and analytical techniques
for millimeter wave (mmWave) cellular systems. The two fundamental physical differences …

A survey of energy-efficient techniques for 5G networks and challenges ahead

S Buzzi, I Chih-Lin, TE Klein, HV Poor… - IEEE Journal on …, 2016‏ - ieeexplore.ieee.org
After about a decade of intense research, spurred by both economic and operational
considerations, and by environmental concerns, energy efficiency has now become a key …