Vol. 14, No. 10, October 31, 2020
10.3837/tiis.2020.10.017,
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Abstract
Non-orthogonal multiple access (NOMA) is widely studied in both academia and industry due
to its high spectral efficiency over orthogonal multiple access (OMA). To effectively improve
spectrum efficiency, an amplify-and-forward (AF) cooperative NOMA system is proposed as
well as a novel detection scheme is proposed, in which we first perform successive
interference cancellation (SIC) twice at U1 for the two signals received from two time slots to
remove interference from symbol 2, then two new signals apply max ratio combining (MRC).
In addition, a closed-form upper bound approximation for the ergodic capacity of our
proposed system is derived. Monte-Carlo simulations and numerical analysis illustrate that our
proposed system has better ergodic capacity performance than the conventional cooperative
NOMA system with decode-forward (DF) relay, the conventional cooperative NOMA system
with AF relay and the proposed AF cooperative NOMA system in [16]. In addition, we can see
that ergodic capacity of all NOMA cooperative systems increase with the increase of transmit
SNR. Finally, simulations display that power allocation coefficients have little effect on
ergodic capacity of all NOMA cooperative systems. This is due to this fact that ergodic
capacity of two symbols can be complementary with changing of power allocation
coefficients.
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Cite this article
[IEEE Style]
X. Xie, Y. Bi, X. Nie, "Capacity Analysis of an AF Relay Cooperative NOMA System Using MRC," KSII Transactions on Internet and Information Systems, vol. 14, no. 10, pp. 4231-4245, 2020. DOI: 10.3837/tiis.2020.10.017.
[ACM Style]
Xianbin Xie, Yan Bi, and Xi Nie. 2020. Capacity Analysis of an AF Relay Cooperative NOMA System Using MRC. KSII Transactions on Internet and Information Systems, 14, 10, (2020), 4231-4245. DOI: 10.3837/tiis.2020.10.017.
[BibTeX Style]
@article{tiis:23929, title="Capacity Analysis of an AF Relay Cooperative NOMA System Using MRC", author="Xianbin Xie and Yan Bi and Xi Nie and ", journal="KSII Transactions on Internet and Information Systems", DOI={10.3837/tiis.2020.10.017}, volume={14}, number={10}, year="2020", month={October}, pages={4231-4245}}