International Journal of

ADVANCED AND APPLIED SCIENCES

EISSN: 2313-3724, Print ISSN: 2313-626X

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 Volume 11, Issue 8 (August 2024), Pages: 66-79

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 Original Research Paper

Enhancing spectral efficiency in uplink/downlink channels of multi-cell massive MIMO for 5G networks

 Author(s): 

 Rao Muhammad Asif 1, Ateeq Ur Rehman 2, *, Sghaier Guizani 3, Habib Hamam 4, 5, 6, 7

 Affiliation(s):

 1Department of Electrical Engineering, Superior University, Lahore 54000, Pakistan
 2School of Computing, Gachon University, Seongnam 13120, South Korea
 3Electrical Engineering Department, Alfaisal University, Riyadh, Saudi Arabia
 4Department of Electrical and Electronic Engineering Science, School of Electrical Engineering, University of Johannesburg, Johannesburg 2006, South Africa
 5Faculty of Engineering, Uni de Moncton, Moncton, NB E1A3E9, Canada
 6Faculty of Graduate Studies and Research, Hodmas University College, Taleh Area, Mogadishu, Somalia
 7Sector of Research and Innovation, Bridges for Academic Excellence, Tunis, Centre-Ville 1002, Tunisia

 Full text

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 * Corresponding Author. 

  Corresponding author's ORCID profile: https://orcid.org/0000-0001-5203-0621

 Digital Object Identifier (DOI)

 https://doi.org/10.21833/ijaas.2024.08.008

 Abstract

Massive multiple-input multiple-output (MIMO) systems are at the forefront of 5G technology, significantly improving energy efficiency compared to earlier wireless communication systems. This study develops an optimal model for energy-efficient massive MIMO systems, aiming to increase spectral efficiency (SE) within a multi-cell framework. Base stations (BSs) use various techniques for channel estimations during uplink (UL) transmission, including minimum mean-squared error (MMSE), Least Squares, and Element-wise MMSE (EW-MMSE) estimators. The research evaluates the SE achievable through MMSE channel estimation by applying different receive combining schemes. Additionally, it explores downlink (DL) transmission using various precoding schemes, utilizing vectors similar to those in combining schemes. Simulations show a significant improvement in SE by advancing UL and DL transmission models. The study highlights that optimized MMSE channel estimation, along with an increased number of BS antennas and the ability to serve multiple user equipment (UEs) per cell, can enhance the average SE per cell. The findings indicate that optimizing channel estimation is crucial for the development of massive MIMO systems, especially for improving SE in both UL and DL transmissions.

 © 2024 The Authors. Published by IASE.

 This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

 Keywords

 Massive MIMO systems, Energy efficiency, Spectral efficiency, Channel estimation, Uplink transmission, Downlink transmission

 Article history

 Received 29 March 2024, Received in revised form 14 July 2024, Accepted 27 July 2024

 Acknowledgment 

No Acknowledgment.

 Compliance with ethical standards

 Conflict of interest: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

 Citation:

 Asif RM, Rehman AU, Guizani S, and Hamam H (2024). Enhancing spectral efficiency in uplink/downlink channels of multi-cell massive MIMO for 5G networks. International Journal of Advanced and Applied Sciences, 11(8): 66-79

 Permanent Link to this page

 Figures

 Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7 

 Tables

 Table 1 Table 2 Table 3 Table 4

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