RIS enabled NOMA for Resource Allocation in Beyond 5G Networks.

The cluster communication of the beyond 5G Heterogeneous Network (Hetnet) is dependent on multiple access techniques. Reconfigurable intelligent surface (RIS) is the potential benefit of 5G when it is combined with nonorthogonal multiple access (NOMA). Although NOMA has been suggested as a way to improve energy efficiency, wireless networks are now denser than before. As a result, the issue with distance, spectrum and energy use gets worse. Due to the limited energy supply, it is necessary to create control over the channel and revolutionary energy efficiency that maximises both total rate and power optimisation. We jointly optimize the transmit power and optimal phase shift to change the weak environment in order to increase the signal-to-noise ratio (SNR) and multiplex data streams in the spatial domain, RIS arrays are used to form beams in the required directions. By decoupling sub channel allocation, a low-complexity sub channel matching method is suggested in order to maximise energy efficiency. In the proposed work, It is demonstrated that the RIS-assisted NOMA system provides promising solutions for users at different scenarios and exhibit significant results in error performance and achievable data rates even in the presence of system imperfections. [ABSTRACT FROM AUTHOR]