Cell-free massive MIMO: A survey

S Elhoushy, M Ibrahim… - … Surveys & Tutorials, 2021 - ieeexplore.ieee.org
Towards a fully connected intelligent digital world, 5G and beyond networks experience a
new era of Internet of intelligence with connected people and things. This new era brings …

Massive MIMO systems for 5G and beyond networks—overview, recent trends, challenges, and future research direction

R Chataut, R Akl - Sensors, 2020 - mdpi.com
The global bandwidth shortage in the wireless communication sector has motivated the
study and exploration of wireless access technology known as massive Multiple-Input …

Foundations of user-centric cell-free massive MIMO

ÖT Demir, E Björnson… - Foundations and Trends …, 2021 - nowpublishers.com
Imagine a coverage area where each mobile device is communicating with a preferred set of
wireless access points (among many) that are selected based on its needs and cooperate to …

6G wireless systems: Vision, requirements, challenges, insights, and opportunities

H Tataria, M Shafi, AF Molisch, M Dohler… - Proceedings of the …, 2021 - ieeexplore.ieee.org
Mobile communications have been undergoing a generational change every ten years or
so. However, the time difference between the so-called “G's” is also decreasing. While fifth …

RIS-aided wireless communications: Prototyping, adaptive beamforming, and indoor/outdoor field trials

X Pei, H Yin, L Tan, L Cao, Z Li, K Wang… - IEEE Transactions …, 2021 - ieeexplore.ieee.org
The prospects of using a Reconfigurable Intelligent Surface (RIS) to aid wireless
communication systems have recently received much attention from academia and industry …

Rayleigh fading modeling and channel hardening for reconfigurable intelligent surfaces

E Björnson, L Sanguinetti - IEEE Wireless Communications …, 2020 - ieeexplore.ieee.org
A realistic performance assessment of any wireless technology requires the use of a
channel model that reflects its main characteristics. The independent and identically …

Intelligent reflecting surface-assisted multi-user MISO communication: Channel estimation and beamforming design

H Alwazani, A Kammoun, A Chaaban… - IEEE Open Journal …, 2020 - ieeexplore.ieee.org
The concept of reconfiguring wireless propagation environments using intelligent reflecting
surfaces (IRS) s has recently emerged, where an IRS comprises of a large number of …

Channel estimation for intelligent reflecting surface assisted multiuser communications: Framework, algorithms, and analysis

Z Wang, L Liu, S Cui - IEEE Transactions on Wireless …, 2020 - ieeexplore.ieee.org
In intelligent reflecting surface (IRS) assisted communication systems, the acquisition of
channel state information is a crucial impediment for achieving the beamforming gain of IRS …

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 …

Beamforming optimization for wireless network aided by intelligent reflecting surface with discrete phase shifts

Q Wu, R Zhang - IEEE Transactions on Communications, 2019 - ieeexplore.ieee.org
Intelligent reflecting surface (IRS) is a cost-effective solution for achieving high spectrum and
energy efficiency in future wireless networks by leveraging massive low-cost passive …