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Power allocation scheme for maximizing spectral efficiency and energy efficiency tradeoff for uplink NOMA systems in B5G/6G
Physical Communication ( IF 2.2 ) Pub Date : 2020-10-21 , DOI: 10.1016/j.phycom.2020.101227
Xinji Tian , Yuxia Huang , Sahil Verma , Machao Jin , Uttam Ghosh , Khaled M. Rabie , Dinh-Thuan Do

Non-orthogonal multiple access (NOMA) is one of the key potential technologies for beyond 5G, i.e., 6G, networks. However, power allocation for spectral efficiency (SE) and energy efficiency (EE) tradeoff for uplink NOMA systems is still an open problem. In this study, we investigate the power allocation problem to maximize SE–EE tradeoff for systems with multi-cluster multi-user applications. Firstly, the power allocation optimization problem is formulated with the constraints of power budget and the minimum rate required by each user. Then, the optimization problem is decomposed into a group of sub-problems, which aim to maximize the tradeoff of SE–EE for each cluster. Finally, these sub-problems are simplified and solved by using bisection method and monotonicity of function. Simulation results show that the proposed scheme achieves much higher SE–EE tradeoff than the existing schemes.



中文翻译:

B5G / 6G中上行链路NOMA系统的频谱分配和能效折衷最大化的功率分配方案

非正交多址访问(NOMA)是超越5G(即6G)网络的关键潜在技术之一。但是,用于频谱效率(SE)和能量效率(EE)权衡的上行链路NOMA系统的功率分配仍然是一个未解决的问题。在本研究中,我们调查了功率分配问题,以使具有多集群多用户应用程序的系统获得最大的SE–EE权衡。首先,在功率预算约束和每个用户所需的最小费率的约束条件下,提出了功率分配优化问题。然后,将优化问题分解为一组子问题,以最大程度地权衡每个群集的SE–EE。最后,通过使用二等分法和函数的单调性来简化和解决这些子问题。

更新日期:2020-11-09
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