Energy Harvesting Aided PASTAR-RIS-Empowered NOMA System in the Presence of Impulsive Noise

Reconfigurable intelligent surfaces are considered as a promising emerging technology for beyond-5^th Generation /6^th Generation wireless systems. Leveraging energy harvesting technology, this paper considers an energy constrained source node that harvests energy from a power source through passive reconfigurable intelligent surfaces. The harvested energy is then utilized to serve multiple downlink power domain non-orthogonal multiple access users with the aid of partitioned active simultaneous transmitting and reflecting reconfigurable intelligent surface. Partitioned active simultaneous transmitting and reflecting reconfigurable intelligent surface as well as power domain non-orthogonal multiple access users are assumed to be impaired by impulsive noise. Hardware impairments are also accounted for at the source node and the power domain non-orthogonal multiple access users. It is shown that the impact of impulsive noise is negligible for imperfect successive interference cancellation at the power domain non-orthogonal multiple access users. However, for perfect successive interference cancellation, impulsive noise at the partitioned active simultaneous transmitting and reflecting reconfigurable intelligent surface degrades performance more severely for the nearest user than the farthest.