Abstract
In this letter, we investigate the amalgamation between the reconfigurable intelligent surface (RIS) technology and the joint transmission coordinated multipoint (JT-CoMP) in order to enhance the performance of a cell-edge user equipment (UE) in a two-user non-orthogonal multiple access (NOMA) group without deteriorating the performance of the NOMA cell-center UE. The RIS is adopted to construct a strong combined channel gain at the cell-edge UE, while JT-CoMP is used to mitigate the effects of inter-cell interference (ICI). In this proposed framework, we derive first a closed-form expression for the ergodic rate of the cell-edge UE, and then we evaluate the network spectral efficiency. We validate the derived expression through Monte-Carlo simulations, where we demonstrate the efficacy of the proposed framework compared to other multiple access techniques proposed in the literature.
Original language | English |
---|---|
Article number | 9217565 |
Pages (from-to) | 632-636 |
Number of pages | 5 |
Journal | IEEE Communications Letters |
Volume | 25 |
Issue number | 2 |
DOIs | |
Publication status | Published - Feb 2021 |
Externally published | Yes |
Keywords
- 6G
- CoMP
- NOMA
- RIS
- spectral efficiency