Outage Analysis of OFDMA Based NOMA Aided Full-Duplex Cooperative D2D System

Non-Orthogonal multiple access (NOMA) and full-duplex (FD) have recently emerged as a potential candidate for fifth-generation (5G) and beyond technologies to improve the spectral efficiency of a cellular system. This paper proposes the orthogonal frequency division multiple access (OFDMA) based NOMA-aided FD cooperative device-to-device (C-D2D) communication system, wherein, a D2D transmitter (DT) acts as an FD relay to support simultaneous bidirectional communication between a base station (BS) and a cellular user (CU). The self-interference suppression (SIS) technique is employed at DT to mitigate self-interference (SI). In addition, a power splitting protocol using NOMA is incorporated for the FD C-D2D system to share the resources between the cellular and D2D user. Successive interference cancellation (SIC) is used at the DT to decode the signals. The analytical expressions for achievable rates of the cellular and D2D links and their outage probabilities are derived. Simulation results validate the theoretical analysis.