Cell-Free Massive MIMO-NOMA Systems with Imperfect SIC and Non-Reciprocal Channels

Aline A. Ohashi; Daniel Benevides Da Costa; Andre L.P. Fernandes; Waldeir Monteiro; Ruan Failache; Andre Mendes Cavalcante; Joao C.W.A. Costa

doi:10.1109/LWC.2021.3066042

Cell-Free Massive MIMO-NOMA Systems with Imperfect SIC and Non-Reciprocal Channels

Aline A. Ohashi
, Daniel Benevides Da Costa
, Andre L.P. Fernandes
, Waldeir Monteiro
, Ruan Failache
, Andre Mendes Cavalcante
, Joao C.W.A. Costa

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

In this letter, we investigate the impact of non-reciprocities in cell-free massive MIMO with non-orthogonal multiple access (NOMA). To this end, closed-form expressions for the users' spectral efficiency (SE) are derived assuming pilot contamination, imperfect successive interference cancellation (SIC), and non-reciprocal channels. Based on the attained expressions, illustrative numerical examples are plotted for a scenario with 100 APs covering an area of 1 km2 with 20 users. Our results show that under mismatches and imperfect SIC, NOMA still outperforms OMA, providing a good SE gain, especially for 40% worst likely users, increasing the user fairness.

Original language	English
Article number	9378793
Pages (from-to)	1329-1333
Number of pages	5
Journal	IEEE Wireless Communications Letters
Volume	10
Issue number	6
DOIs	https://doi.org/10.1109/LWC.2021.3066042
State	Published - Jun 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2012 IEEE.

Keywords

Cell-free massive MIMO
NOMA
imperfect SIC
non-reciprocities

ASJC Scopus subject areas

Control and Systems Engineering
Electrical and Electronic Engineering

Access to Document

10.1109/LWC.2021.3066042

Cite this

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title = "Cell-Free Massive MIMO-NOMA Systems with Imperfect SIC and Non-Reciprocal Channels",

abstract = "In this letter, we investigate the impact of non-reciprocities in cell-free massive MIMO with non-orthogonal multiple access (NOMA). To this end, closed-form expressions for the users' spectral efficiency (SE) are derived assuming pilot contamination, imperfect successive interference cancellation (SIC), and non-reciprocal channels. Based on the attained expressions, illustrative numerical examples are plotted for a scenario with 100 APs covering an area of 1 km2 with 20 users. Our results show that under mismatches and imperfect SIC, NOMA still outperforms OMA, providing a good SE gain, especially for 40\% worst likely users, increasing the user fairness.",

keywords = "Cell-free massive MIMO, NOMA, imperfect SIC, non-reciprocities",

author = "Ohashi, \{Aline A.\} and Costa, \{Daniel Benevides Da\} and Fernandes, \{Andre L.P.\} and Waldeir Monteiro and Ruan Failache and Cavalcante, \{Andre Mendes\} and Costa, \{Joao C.W.A.\}",

note = "Publisher Copyright: {\textcopyright} 2012 IEEE.",

year = "2021",

month = jun,

doi = "10.1109/LWC.2021.3066042",

language = "English",

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T1 - Cell-Free Massive MIMO-NOMA Systems with Imperfect SIC and Non-Reciprocal Channels

AU - Ohashi, Aline A.

AU - Costa, Daniel Benevides Da

AU - Fernandes, Andre L.P.

AU - Monteiro, Waldeir

AU - Failache, Ruan

AU - Cavalcante, Andre Mendes

AU - Costa, Joao C.W.A.

PY - 2021/6

Y1 - 2021/6

N2 - In this letter, we investigate the impact of non-reciprocities in cell-free massive MIMO with non-orthogonal multiple access (NOMA). To this end, closed-form expressions for the users' spectral efficiency (SE) are derived assuming pilot contamination, imperfect successive interference cancellation (SIC), and non-reciprocal channels. Based on the attained expressions, illustrative numerical examples are plotted for a scenario with 100 APs covering an area of 1 km2 with 20 users. Our results show that under mismatches and imperfect SIC, NOMA still outperforms OMA, providing a good SE gain, especially for 40% worst likely users, increasing the user fairness.

AB - In this letter, we investigate the impact of non-reciprocities in cell-free massive MIMO with non-orthogonal multiple access (NOMA). To this end, closed-form expressions for the users' spectral efficiency (SE) are derived assuming pilot contamination, imperfect successive interference cancellation (SIC), and non-reciprocal channels. Based on the attained expressions, illustrative numerical examples are plotted for a scenario with 100 APs covering an area of 1 km2 with 20 users. Our results show that under mismatches and imperfect SIC, NOMA still outperforms OMA, providing a good SE gain, especially for 40% worst likely users, increasing the user fairness.

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KW - imperfect SIC

KW - non-reciprocities

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ER -

Cell-Free Massive MIMO-NOMA Systems with Imperfect SIC and Non-Reciprocal Channels

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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