Performance analysis of cooperative NOMA-assisted downlink SWIPT communication system

In this paper, the outage performances of the downlink collaborative non-orthogonal multiple access (NOMA) assisted simultaneous wireless information and power transfer (SWIPT) system are investigated. SWIPT-assisted cooperative relaying transmission offers a sustainable solution to address both performance equity between center and edge users in cells, as well as ensuring fair energy consumption for cell-center users. As far as the concrete is concerned, It is potential to consider the near-end user in NOMA as a repeater in the SWIPT system. The outage probability (OP) of a cooperative NOMA-assisted downlink SWIPT communication system is examined. Specifically, the OP expressions for a two-user NOMA system are derived. The numerical results demonstrate that employing cooperative SWIPT relaying transmission with an optimized power splitting (PS) coefficient significantly enhances the OP for edge users in the cell.