Massive MIMO-NOMA Networks with Imperfect SIC: Design and Fairness Enhancement
de Sena, Arthur S.; Nardelli, Pedro H. J.; Lima, F. Rafael M.; da Costa, Daniel B.; Ding, Zhiguo; Dias, Ugo S.; Papadias, Constantinos B. (2020-06-11)
Post-print / Final draft
de Sena, Arthur S.
Nardelli, Pedro H. J.
Lima, F. Rafael M.
da Costa, Daniel B.
Ding, Zhiguo
Dias, Ugo S.
Papadias, Constantinos B.
11.06.2020
IEEE Transactions on Wireless Communications
IEEE
School of Energy Systems
Kaikki oikeudet pidätetään.
© 2020 IEEE
© 2020 IEEE
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2020061543266
https://urn.fi/URN:NBN:fi-fe2020061543266
Tiivistelmä
This paper addresses multi-user multi-cluster massive multiple-input-multiple-output (MIMO) systems with non-orthogonal multiple access (NOMA). Assuming the downlink mode, and taking into consideration the impact of imperfect successive interference cancellation (SIC), an in-depth analytical analysis is carried out, in which closed-form expressions for the outage probability and ergodic rates are derived. Subsequently, the power allocation coefficients of users within each sub-group are optimized to maximize fairness. The considered power optimization is simplified to a convex problem, which makes it possible to obtain the optimal solution via Karush-Kuhn-Tucker (KKT) conditions. Based on the achieved solution, we propose an iterative algorithm to provide fairness also among different sub-groups. Simulation results alongside with insightful discussions are provided to investigate the impact of imperfect SIC and demonstrate the fairness superiority of the proposed dynamic power allocation policies. For example, our results show that if the residual error propagation levels are high, the employment of orthogonal multiple access (OMA) is always preferable than NOMA. It is also shown that the proposed power allocation outperforms conventional massive MIMO-NOMA setups operating with fixed power allocation strategies in terms of outage probability.
Lähdeviite
de Sena, A.S., Lima, F.R.M., da Costa, D.B., Ding, Z., Nardelli, P.H.J., Dias, U.S., Papadias, C.B. (2020). Massive MIMO-NOMA Networks with Imperfect SIC: Design and Fairness Enhancement. IEEE Transactions on Wireless Communications. DOI: 10.1109/TWC.2020.3000192
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