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Telecommunication Systems

Erschienen in:

01.04.2021

The cell-free mMIMO networks: mathematical analysis and performance evaluation

verfasst von: Mohamed Shalaby, Hussein Mohamed Hussein, Mona Shokair, A. M. Benaya

Erschienen in: Telecommunication Systems | Ausgabe 4/2021

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Abstract

One of the motivations towards the 5G cellular networks and beyond is the large increase in the supported data rate in both uplink and downlink. Deployment of small size cells, massive MIMO, wherein a large number of antennas are deployed at transmitters and receiver, are effective tools in these networks. Users under cell massive MIMO networks “mMIMO” can provide high data rate. However, the cell-edge user and users, under shadowing, can have a poor performance. Cell-Free networks can provide a satisfied data rate even for shadowed and cell-edge users. In this paper, cell-Free mMIMO networks are mathematically analyzed applying different cooperation mechanisms among the access points APs. Moreover, a new mathematical formula for the throughput, based on BER, is derived. Furthermore, closed formulas for the throughput-BER as well as energy efficiency (EE) performance are derived. Finally, the cognitive radio concept is proposed in order to limit the interference among users accessing the same resources in uplink. Simulation results show that the fully centralized cell-Free mMIMO network has a higher spectral efficiency and energy efficiency than the cellular mMIMO networks at different BER values especially when MMSE is applied. Furthermore, the cognitive radio theory can increase the SE and EE performance of the cell-Free networks when all cooperation mechanisms are applied.

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Titel: The cell-free mMIMO networks: mathematical analysis and performance evaluation
verfasst von: Mohamed Shalaby
Hussein Mohamed Hussein
Mona Shokair
A. M. Benaya
Publikationsdatum: 01.04.2021
Verlag: Springer US
Erschienen in: Telecommunication Systems / Ausgabe 4/2021
Print ISSN: 1018-4864
Elektronische ISSN: 1572-9451
DOI: https://doi.org/10.1007/s11235-021-00776-z

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