Joint Spectrum and Power Allocation for NOMA Enhanced Relaying Networks

In this paper, we investigate the joint resource allocation for the non-orthogonal multiple access (NOMA)-enhanced relaying networks involving the subcarrier pair, subcarrier-user assignment, as well as power allocation. In the NOMA-enhanced relaying networks, the relay is capable of communicating w...

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Autores principales:	Qiang Wang, Feng Zhao
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2019
Materias:	NOMA spectrum allocation power allocation relaying system Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/3aa327407a864dd5b9de8058ca2bc1c0
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spelling	oai:doaj.org-article:3aa327407a864dd5b9de8058ca2bc1c02021-11-19T00:02:34ZJoint Spectrum and Power Allocation for NOMA Enhanced Relaying Networks2169-353610.1109/ACCESS.2019.2900225https://doaj.org/article/3aa327407a864dd5b9de8058ca2bc1c02019-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/8654611/https://doaj.org/toc/2169-3536In this paper, we investigate the joint resource allocation for the non-orthogonal multiple access (NOMA)-enhanced relaying networks involving the subcarrier pair, subcarrier-user assignment, as well as power allocation. In the NOMA-enhanced relaying networks, the relay is capable of communicating with multiple users on one subcarrier using the NOMA technology. To maximize the system throughput, the joint resource allocation problem is formulated as a mixed-integer nonlinear programming problem, which is difficult to tackle in general. Furthermore, there is strong coupling between the subcarrier-user assignment and the power allocation due to the multi-user interference in the NOMA system. To reduce the complexity, we separate the joint resource allocation problem as two subproblems in terms of the subcarrier assignment (subcarrier pair and subcarrier-user assignment) and power allocation, respectively. In particular, we propose a subcarrier assignment scheme based on the simulated annealing algorithm to optimize the subcarrier pair and subcarrier-user assignment with the fixed power allocation. Then, the power allocation problem is transformed as a difference of convex functions programming problem, and the sequence convex programming method is adopted to solve it. The simulation results illustrate that the proposed algorithm can effectively improve the system throughput.Qiang WangFeng ZhaoIEEEarticleNOMAspectrum allocationpower allocationrelaying systemElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 7, Pp 27008-27016 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	NOMA spectrum allocation power allocation relaying system Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	NOMA spectrum allocation power allocation relaying system Electrical engineering. Electronics. Nuclear engineering TK1-9971 Qiang Wang Feng Zhao Joint Spectrum and Power Allocation for NOMA Enhanced Relaying Networks
description	In this paper, we investigate the joint resource allocation for the non-orthogonal multiple access (NOMA)-enhanced relaying networks involving the subcarrier pair, subcarrier-user assignment, as well as power allocation. In the NOMA-enhanced relaying networks, the relay is capable of communicating with multiple users on one subcarrier using the NOMA technology. To maximize the system throughput, the joint resource allocation problem is formulated as a mixed-integer nonlinear programming problem, which is difficult to tackle in general. Furthermore, there is strong coupling between the subcarrier-user assignment and the power allocation due to the multi-user interference in the NOMA system. To reduce the complexity, we separate the joint resource allocation problem as two subproblems in terms of the subcarrier assignment (subcarrier pair and subcarrier-user assignment) and power allocation, respectively. In particular, we propose a subcarrier assignment scheme based on the simulated annealing algorithm to optimize the subcarrier pair and subcarrier-user assignment with the fixed power allocation. Then, the power allocation problem is transformed as a difference of convex functions programming problem, and the sequence convex programming method is adopted to solve it. The simulation results illustrate that the proposed algorithm can effectively improve the system throughput.
format	article
author	Qiang Wang Feng Zhao
author_facet	Qiang Wang Feng Zhao
author_sort	Qiang Wang
title	Joint Spectrum and Power Allocation for NOMA Enhanced Relaying Networks
title_short	Joint Spectrum and Power Allocation for NOMA Enhanced Relaying Networks
title_full	Joint Spectrum and Power Allocation for NOMA Enhanced Relaying Networks
title_fullStr	Joint Spectrum and Power Allocation for NOMA Enhanced Relaying Networks
title_full_unstemmed	Joint Spectrum and Power Allocation for NOMA Enhanced Relaying Networks
title_sort	joint spectrum and power allocation for noma enhanced relaying networks
publisher	IEEE
publishDate	2019
url	https://doaj.org/article/3aa327407a864dd5b9de8058ca2bc1c0
work_keys_str_mv	AT qiangwang jointspectrumandpowerallocationfornomaenhancedrelayingnetworks AT fengzhao jointspectrumandpowerallocationfornomaenhancedrelayingnetworks
_version_	1718420663247568896

Joint Spectrum and Power Allocation for NOMA Enhanced Relaying Networks

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