Energy-Efficient full-duplex cooperative non-orthogonal multiple access

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Energy-Efficient full-duplex cooperative non-orthogonal multiple access
Title:
Energy-Efficient full-duplex cooperative non-orthogonal multiple access
Journal Title:
IEEE Transactions on Vehicular Technology
Publication Date:
01 October 2018
Citation:
Z. Wei, X. Zhu, S. Sun, J. Wang and L. Hanzo, "Energy-Efficient Full-Duplex Cooperative Nonorthogonal Multiple Access," in IEEE Transactions on Vehicular Technology, vol. 67, no. 10, pp. 10123-10128, Oct. 2018. doi: 10.1109/TVT.2018.2864545
Abstract:
The full-duplex (FD) cooperative nonorthogonal multiple access (NOMA) achieves a superior throughput over the conventional half-duplex (HD) cooperative NOMA, wherein the strong users (SUs) with good channel conditions can act as an FD relay node for the weak users with poor channel conditions. However, the energy efficiency (EE) of a cooperative NOMA may be degraded due to the additional power consumption incurred at the SUs. We are, therefore, motivated to investigate the EE maximization problem of an FD cooperative NOMA system. More importantly, we investigate the “signal-to-inference-noise ratio gap reversal” problem of cooperative NOMA systems, which imposes successive interference cancellation (SIC) performance degradation at the SUs. This problem has not been documented in the existing cooperative NOMA literature. A low-complexity algorithm is proposed for maximizing the system's EE while guaranteeing a successful SIC operation. Our numerical results show that the proposed algorithm achieves both a higher EE and throughput over the existing HD cooperative NOMA and nonadaptive FD cooperative NOMA. More importantly, the proposed scheme guarantees a successful SIC operation at the SUs.
License type:
PublisherCopyrights
Funding Info:
Description:
(c) 2018 IEEE.
ISSN:
0018-9545
1939-9359
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