下行链路多用户VLC系统的多址接入：NOMA还是OMA用户配对？

IF 4.6 3区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS

IEEE Wireless Communications Letters Pub Date : 2023-07-26 DOI:10.1109/LWC.2023.3299115

Zehao Liu;Fang Yang;Jian Song;Zhu Han

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引用次数: 0

摘要

非正交多址（NOMA）被认为是第五代蜂窝系统的主要候选方案之一。在这封信中，我们比较了用于可见光通信（VLC）系统的NOMA和正交多址（OMA），并表明VLC中NOMA和OMA之间的关系不同于射频（RF）系统，因为传统的Shannon公式不适合表达VLC的系统容量。此外，根据两种用户配对准则，我们提出了一种用于VLC的NOMA和OMA混合方案。为了最大化可实现的和率，提出了一种低复杂度的基于排列的遗传算法来优化NOMA和OMA混合方案中的用户配对。仿真结果表明，与其他基线方案相比，所提出的遗传算法可以获得相当大的性能增益。

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Multiple Access for Downlink Multi-User VLC System: NOMA or OMA User Pairing?

Non-orthogonal multiple access (NOMA) is regarded as one of the primary enabling candidates for fifth-generation cellular systems. In this letter, we compare NOMA with orthogonal multiple access (OMA) for visible light communication (VLC) systems, and show that the relationship between NOMA and OMA in VLC is different from that in radio frequency (RF) systems, since the traditional Shannon formula is not suitable for expressing the system capacity of VLC. Moreover, we propose a hybrid NOMA and OMA scheme for VLC according to two user pairing guidelines. In order to maximize the achievable sum rate, a permutation-based genetic algorithm with low complexity is proposed to optimize user pairings in the hybrid NOMA and OMA scheme. Simulation results demonstrate that considerable performance gains can be achieved by the proposed genetic algorithm compared to other baseline schemes.

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来源期刊

IEEE Wireless Communications Letters Engineering-Electrical and Electronic Engineering

CiteScore

12.30

自引率

6.30%

发文量

481

期刊介绍： IEEE Wireless Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of wireless communications. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of wireless communication systems.