Abstract
In this paper, we study reconfigurable intelligent surface (RIS) assisted visible light communication (VLC) systems, where the hybrid non-orthogonal multiple access (NOMA) technology is used to improve its performance. Specifically, sparse code multiple access (SCMA) and power-domain NOMA (PDNOMA) are jointly used to support more users in each light emitting diode (LED) lamp group. Meanwhile, the maximum capacity of the system under different RIS allocation schemes is studied. To maximize the communication capacity of the VLC system on the basis of meeting users’ fairness, a two-step optimization scheme is used to optimize the power distribution ratio of the user group and RIS reflection unit respectively. Numerical results show that the hybrid NOMA and RIS techniques can significantly improve the communication capacity of VLC systems.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
