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Massive MIMO Systems for 5G and beyond Networks—Overview, Recent Trends, Challenges, and Future Research Direction

by *,† and
Department of Computer Science and Engineering, University of North Texas, Denton, TX 76203, USA
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Sensors 2020, 20(10), 2753; https://doi.org/10.3390/s20102753
Received: 9 April 2020 / Revised: 7 May 2020 / Accepted: 7 May 2020 / Published: 12 May 2020
(This article belongs to the Special Issue 5G and beyond Cellular Networks for Intelligent Sensing Systems)
The global bandwidth shortage in the wireless communication sector has motivated the study and exploration of wireless access technology known as massive Multiple-Input Multiple-Output (MIMO). Massive MIMO is one of the key enabling technology for next-generation networks, which groups together antennas at both transmitter and the receiver to provide high spectral and energy efficiency using relatively simple processing. Obtaining a better understating of the massive MIMO system to overcome the fundamental issues of this technology is vital for the successful deployment of 5G—and beyond—networks to realize various applications of the intelligent sensing system. In this paper, we present a comprehensive overview of the key enabling technologies required for 5G and 6G networks, highlighting the massive MIMO systems. We discuss all the fundamental challenges related to pilot contamination, channel estimation, precoding, user scheduling, energy efficiency, and signal detection in a massive MIMO system and discuss some state-of-the-art mitigation techniques. We outline recent trends such as terahertz communication, ultra massive MIMO (UM-MIMO), visible light communication (VLC), machine learning, and deep learning for massive MIMO systems. Additionally, we discuss crucial open research issues that direct future research in massive MIMO systems for 5G and beyond networks. View Full-Text
Keywords: 5G; 6G; beamforming; channel estimation; massive MIMO; millimeter waves; pilot contamination; signal detection; spectral efficiency; terahertz spectrum 5G; 6G; beamforming; channel estimation; massive MIMO; millimeter waves; pilot contamination; signal detection; spectral efficiency; terahertz spectrum
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MDPI and ACS Style

Chataut, R.; Akl, R. Massive MIMO Systems for 5G and beyond Networks—Overview, Recent Trends, Challenges, and Future Research Direction. Sensors 2020, 20, 2753. https://doi.org/10.3390/s20102753

AMA Style

Chataut R, Akl R. Massive MIMO Systems for 5G and beyond Networks—Overview, Recent Trends, Challenges, and Future Research Direction. Sensors. 2020; 20(10):2753. https://doi.org/10.3390/s20102753

Chicago/Turabian Style

Chataut, Robin; Akl, Robert. 2020. "Massive MIMO Systems for 5G and beyond Networks—Overview, Recent Trends, Challenges, and Future Research Direction" Sensors 20, no. 10: 2753. https://doi.org/10.3390/s20102753

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