A PSO-Based Approach for User-Pairing Schemes in NOMA Systems: Theory and Applications
A PSO-Based Approach for User-Pairing Schemes in NOMA Systems: Theory and Applications
复制标题
DOI：
10.1109/access.2019.2926641
复制
发表时间：
2019-01-01
期刊：
影响因子：
3.9
通讯作者：
Nguyen, Minh T.
中科院分区：
文献类型：
--
作者：
Masaracchia, Antonino;Da Costa, Daniel Benevides;Nguyen, Minh T.
针对非正交多址(NOMA)系统中不同子信道上的用户聚合问题，提出了一种基于粒子群算法(PSO)的配置方案。这背后的想法是强调这种基于PSO的配置的主要特征，以了解该策略如何使发射机在保证每个用户的服务质量(Qos)约束的同时，要求最低的下行链路传输功率。分析了两种典型的功率受限场景，即救灾网络通信和无人机通信，其中低功率传输是一个重要方面。我们的结果适用于NOMA系统中用户复用的显式信道状态感知策略的定义，目前，这是一个有待更深入研究的研究领域。我们的分析提供了富有洞察力的讨论。例如，根据可用子信道的数量和每个用户所经历的信道增益以及整个可用带宽，图中示出了为了达到最小发射功率，发射机必须如何对用户进行多路复用。
This paper proposes an exhaustive analysis of a particle swarm optimization (PSO)-based configuration applied in non-orthogonal multiple access (NOMA) systems in order to perform user aggregation along different sub-channels. The idea behind this is to highlight the main characteristics of this PSO-based configuration for understanding how this policy enables the transmitter to require the minimum downlink transmitting power while guaranteeing the quality-of-service (QoS) constraint of each user. The analysis is carried out for two representative power-constrained scenarios, i.e., disaster relief network communications and unmanned aerial vehicle (UAV) communications, in which performing low-power transmissions represent an important aspect. Our results find applicability in the definition of explicit channel-state-aware strategies for user multiplexing in NOMA systems, which, at the date, represents a research field that remains to be investigated more in depth. Insightful discussions are provided from our analysis. For instance, depending on the number of available sub-channels and the channel gains experienced by each users along with the whole available bandwidth, it is shown how users must be multiplexed by the transmitter in order to reach the minimum transmitting power.