Performance of RIS-empowered NOMA-based D2D Communication under Nakagami-m Fading

TL;DR

This paper evaluates how reconfigurable intelligent surfaces (RIS) improve the spectral and energy efficiency of NOMA-based device-to-device communication under Nakagami-m fading, providing analytical expressions and simulation validation.

Contribution

It derives closed-form expressions for spectral and energy efficiency limits of RIS-enabled NOMA D2D systems and compares their performance with orthogonal schemes.

Findings

RIS significantly enhances NOMA D2D network performance

Analytical bounds for spectral and energy efficiency are established

Simulations confirm the analytical results

Abstract

Reconfigurable intelligent surfaces (RISs) have sparked a renewed interest in the research community envisioning future wireless communication networks. In this study, we analyzed the performance of RIS-enabled non-orthogonal multiple access (NOMA) based device-to-device (D2D) wireless communication system, where the RIS is partitioned to serve a pair of D2D users. Specifically, closed-form expressions are derived for the upper and lower limits of spectral efficiency (SE) and energy efficiency (EE). In addition, the performance of the proposed NOMA-based system is also compared with its orthogonal counterpart. Extensive simulation is done to corroborate the analytical findings. The results demonstrate that RIS highly enhances the performance of a NOMA-based D2D network.