Implementation challenges and opportunities in beyond-5G and 6G communication
Review article, 2021

As 5G New Radio (NR) is being rolled out, research effort is being focused on the evolution of what is to come in the post-5G era. In order to meet the diverse requirements of future wireless communication in terms of increased capacity and reduced latency, technologies such as distributed
massive Multiple-Input Multiple-Output (MIMO), sub-millimeter wave and Tera-hertz spectrum become
technology components of interest. Furthermore, to meet the demands on connectivity anywhere at anytime,
non-terrestrial satellite networks will be needed, which brings about challenges both in terms of implementation as well as deployment. Finally, scaling up massive Internet-of-Things (IoT), energy harvesting and
Simultaneous Wireless Information and Power Transfer (SWIPT) is foreseen to become important enablers
when deploying a large amount of small, low-power radios. In this paper, we will discuss some of the
important opportunities these technologies bring, and the challenges faced by the microwave and wireless
communication communities.

sub-millimeter wave

distributed massive MIMO

non-terrestrial networks

S Beyond-5G

energy harvesting.


Ulf Gustavsson


Pål Frenger


Christian Fager

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Thomas Eriksson

Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks

Herbert Zirath

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Franz Dielacher

Infineon Technologies

Christoph Studer

Swiss Federal Institute of Technology in Zürich (ETH)

Aarno Parssinen

University of Oulu

Ricardo Correia

Polytechnic Institute of Viseu

Joao Nuno Matos

University of Aveiro

Daniel Belo

University of Aveiro

Nuno Carvalho

University of Aveiro

IEEE Journal of Microwaves

2692-8388 (ISSN) 2692-8388 (eISSN)

Vol. 1 1 86-100 9318749

Areas of Advance

Information and Communication Technology

Subject Categories


Communication Systems



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