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Power allocation scheme for maximizing spectrum efficiency and energy efficiency tradeoff for multi-cluster NOMA system

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In this paper,a power allocation to maximize tradeoff between spectrum efficiency (SE) and energy efficiency (EE) is considered for the downlink non-orthogonal multiple access (NOMA) system with arbitrarily clusters and arbitrarily users,where the subcarriers of clusters are mutually orthogonal to each other.Specifically,an optimization problem of maximizing SE-EE tradeoff is formulated by optimizing power allocation among users under the constraints of user rate requirements.Then,the optimization problem is decomposed into a group of subproblems with the aim of maximizing SE-EE tradeoff for each cluster,which is solved by using bisection method and monotonicity of function.Finally,the power allocation optimization problem among users is transformed into that between clusters,and a two steps inter-cluster power allocation algorithm is developed to solve this problem.Simulation results show that SE-EE tradeoff of the proposed scheme is better than that of the existing schemes.

NOMApower allocationspectrum efficiencyenergy efficiencytradeoff

Li Ya、Zhang Danqing、Tian Xinji

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School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China

This work was supported by the Henan Scientific and Technological Research Project ResearchThis work was supported by the Henan Scientific and Technological Research Project ResearchThis work was supported by the Henan Scientific and Technological Research Project ResearchDepartment of Education of Henan Province ‘Research on Clustering and Frequency Band Allocation in JT-CoMP’

17210221002319A510013.

2020

中国邮电高校学报(英文版)
北京邮电大学

中国邮电高校学报(英文版)

CSCDEI
影响因子：0.419
ISSN：1005-8885
年,卷(期)：2020.27(3)
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