Spectral-energy efficiency maximization for wireless powered low-latency NOMA systems with full-duplex relaying
Abstract This paper investigates a wireless powered communication system, where a base station (BS) and relay first harvest energy from the power beacon and use it for data transmission. Using non-orthogonal multiple access (NOMA), the BS delivers the messages to two NOMA users via a full-duplex (FD...
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doaj-371ef2b3c5d14b988d8150d6a98a9e3b2020-11-25T03:12:03ZengSpringerOpenEURASIP Journal on Wireless Communications and Networking1687-14992019-08-012019111110.1186/s13638-019-1516-zSpectral-energy efficiency maximization for wireless powered low-latency NOMA systems with full-duplex relayingXianghua Liu0Jianlin Mo1Department of Information Technology, Wenzhou Vocational and Technical CollegeDepartment of Electronic Information and Automation, ABA Teachers UniversityAbstract This paper investigates a wireless powered communication system, where a base station (BS) and relay first harvest energy from the power beacon and use it for data transmission. Using non-orthogonal multiple access (NOMA), the BS delivers the messages to two NOMA users via a full-duplex (FD) relay to realize low-latency communication. As two important metrics in fifth-generation communication systems, spectral and energy efficiency are jointly analyzed in this paper. Under quality of service (QoS) requirement of two NOMA users and power constraints at the BS and relay, beamforming and time allocation ratio are jointly optimized so as to maximize sum data rate and energy efficiency of system. The formulated problems are hard to be solved directly due to its non-concave objective and non-convex constraints. To tackle these, one-dimensional search and path-following-based algorithms are proposed, which can iteratively obtain improved objectives with convergence guaranteed. With fast convergence and insensitivity to problem size, the proposed algorithm can reach at least local optimum. Numerical results verify the advantages of the proposed algorithms and the superiority of the proposed scheme.http://link.springer.com/article/10.1186/s13638-019-1516-zEnergy efficiencyNon-orthogonal multiple access (NOMA)Full-duplex (FD)Low latencyEnergy harvesting |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xianghua Liu Jianlin Mo |
spellingShingle |
Xianghua Liu Jianlin Mo Spectral-energy efficiency maximization for wireless powered low-latency NOMA systems with full-duplex relaying EURASIP Journal on Wireless Communications and Networking Energy efficiency Non-orthogonal multiple access (NOMA) Full-duplex (FD) Low latency Energy harvesting |
author_facet |
Xianghua Liu Jianlin Mo |
author_sort |
Xianghua Liu |
title |
Spectral-energy efficiency maximization for wireless powered low-latency NOMA systems with full-duplex relaying |
title_short |
Spectral-energy efficiency maximization for wireless powered low-latency NOMA systems with full-duplex relaying |
title_full |
Spectral-energy efficiency maximization for wireless powered low-latency NOMA systems with full-duplex relaying |
title_fullStr |
Spectral-energy efficiency maximization for wireless powered low-latency NOMA systems with full-duplex relaying |
title_full_unstemmed |
Spectral-energy efficiency maximization for wireless powered low-latency NOMA systems with full-duplex relaying |
title_sort |
spectral-energy efficiency maximization for wireless powered low-latency noma systems with full-duplex relaying |
publisher |
SpringerOpen |
series |
EURASIP Journal on Wireless Communications and Networking |
issn |
1687-1499 |
publishDate |
2019-08-01 |
description |
Abstract This paper investigates a wireless powered communication system, where a base station (BS) and relay first harvest energy from the power beacon and use it for data transmission. Using non-orthogonal multiple access (NOMA), the BS delivers the messages to two NOMA users via a full-duplex (FD) relay to realize low-latency communication. As two important metrics in fifth-generation communication systems, spectral and energy efficiency are jointly analyzed in this paper. Under quality of service (QoS) requirement of two NOMA users and power constraints at the BS and relay, beamforming and time allocation ratio are jointly optimized so as to maximize sum data rate and energy efficiency of system. The formulated problems are hard to be solved directly due to its non-concave objective and non-convex constraints. To tackle these, one-dimensional search and path-following-based algorithms are proposed, which can iteratively obtain improved objectives with convergence guaranteed. With fast convergence and insensitivity to problem size, the proposed algorithm can reach at least local optimum. Numerical results verify the advantages of the proposed algorithms and the superiority of the proposed scheme. |
topic |
Energy efficiency Non-orthogonal multiple access (NOMA) Full-duplex (FD) Low latency Energy harvesting |
url |
http://link.springer.com/article/10.1186/s13638-019-1516-z |
work_keys_str_mv |
AT xianghualiu spectralenergyefficiencymaximizationforwirelesspoweredlowlatencynomasystemswithfullduplexrelaying AT jianlinmo spectralenergyefficiencymaximizationforwirelesspoweredlowlatencynomasystemswithfullduplexrelaying |
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