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

被引：12
作者：
Liu, Zehao [1 ,2 ]
Yang, Fang [1 ,2 ]
Song, Jian [1 ,3 ]
Han, Zhu [4 ,5 ]
机构：
[1] Tsinghua Univ, Beijing Natl Res Ctr Informat Sci & Technol, Dept Elect Engn, Beijing 100084, Peoples R China
[2] Tsinghua Univ Shenzhen, Key Lab Digital TV Syst Shenzhen City, Res Inst, Shenzhen 518057, Peoples R China
[3] Tsinghua Univ, Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China
[4] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77004 USA
[5] Kyung Hee Univ, Dept Comp Sci & Engn, Seoul 446701, South Korea
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2023年 / 12卷 / 11期
关键词：
NOMA; Visible light communication; Blogs; Guidelines; Radio frequency; Bandwidth; Signal to noise ratio; Visible light communication (VLC); nonorthogonal multiple access (NOMA); orthogonal multiple access (OMA); user pairing; genetic algorithm; ALLOCATION;
D O I：
10.1109/LWC.2023.3299115
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
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.
引用
收藏
页码：1916 / 1920
页数：5
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