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On The Selection of Power Allocation Strategy in Power Domain Non-Orthogonal Multiple Access (PD-NOMA) for 6G and Beyond
Transactions on Emerging Telecommunications Technologies ( IF 3.6 ) Pub Date : 2021-05-11 , DOI: 10.1002/ett.4289
Mohamed Mounir 1 , Mohamed B. El_Mashade 2 , Ashraf Mohamed Aboshosha 3
Affiliation  

Non-orthogonal multiple access (NOMA) is an attractive candidate for 6G networks to support ultra-massive machine-type communications (umMTC). Power domain NOMA (PD-NOMA) is the simplest type of NOMA, which assigns a different power level to each user. Power allocation in PD-NOMA can be classified into fixed/dynamic power allocation (FPA/DPA). FPA is simple, but DPA is more suitable for the mobile environment than FPA. However, finding optimum power per each user in DPA is extremely complex. Fortunately, many DPA strategic design methods were introduced in literature as simple suboptimal solutions of DPA. Therefore, DPA strategic design methods and FPA techniques are simple approaches to implement PD-NOMA in 6G and beyond. In literature, no previous work had compared the performances of all DPA strategic design methods, nor FPA techniques, to ease the selection of a simple strategy for PD-NOMA in 6G. Motivated by that, this work compares performances of all DPA strategic design methods as well as FPA techniques, in terms of sum-rate capacity, fairness, and bit error rate (BER). Results showed that the best DPA strategic design method and the best FPA technique have comparable performance.

中文翻译:

关于 6G 及以后的功率域非正交多址 (PD-NOMA) 功率分配策略的选择

非正交多址 (NOMA) 是 6G 网络支持超大规模机器类通信 (umMTC) 的一个有吸引力的候选者。功率域 NOMA (PD-NOMA) 是最简单的 NOMA 类型,它为每个用户分配不同的功率级别。PD-NOMA 中的功率分配可分为固定/动态功率分配 (FPA/DPA)。FPA 很简单,但 DPA 比 FPA 更适合移动环境。但是,在 DPA 中找到每个用户的最佳功率非常复杂。幸运的是,文献中介绍了许多 DPA 战略设计方法作为 DPA 的简单次优解决方案。因此,DPA 战略设计方法和 FPA 技术是在 6G 及以后实现 PD-NOMA 的简单方法。在文献中,以前的工作没有比较所有 DPA 战略设计方法的性能,也没有 FPA 技术,以简化 6G 中 PD-NOMA 简单策略的选择。受此启发,这项工作比较了所有 DPA 战略设计方法以及 FPA 技术在和速率容量、公平性和误码率 (BER) 方面的性能。结果表明,最佳 DPA 战略设计方法和最佳 FPA 技术具有可比的性能。
更新日期:2021-05-11
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