Power Allocation Optimization and Decoding Order Selection in Uplink C-NOMA Networks

In this paper, we investigate the power allocation and decoding order at the base station (BS) of two-user uplink (UL) cooperative non-orthogonal multiple access (C-NOMA)-based cellular networks. We formulate a joint optimization problem aiming at maximizing the minimum user achievable rate. Given t...

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Bibliographic Details
Published in:IEEE communications letters 2023-01, Vol.27 (1), p.1-1
Main Authors: Elhattab, Mohamed, Arfaoui, Mohamed Amine, Assi, Chadi, Ghrayeb, Ali, Qaraqe, Marwa
Format: Article
Language:English
Subjects:
C-NOMA
Cellular communication
Cellular networks
Decoding
Fairness
NOMA
Nonorthogonal multiple access
Optimization
Power allocation
Resource management
Signal to noise ratio
Symbols
Uplink
Uplinking
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Summary:In this paper, we investigate the power allocation and decoding order at the base station (BS) of two-user uplink (UL) cooperative non-orthogonal multiple access (C-NOMA)-based cellular networks. We formulate a joint optimization problem aiming at maximizing the minimum user achievable rate. Given that the problem at hand is non-convex, as an alternative, we derive low-complexity and near optimal analytical expressions for the power allocation coefficients. We demonstrate through numerical results that the proposed scheme provides superior performance in comparison with the traditional UL NOMA. We also demonstrate that, in UL C-NOMA, decoding the far NOMA user first at the BS provides the best performance.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2022.3214445