Outage Performance Enhancement for NOMA Based Cooperative Relay Sharing Networks

Li, Yan and Li, Tao and Li, Yongzhao and Pervaiz, Haris and Ni, Qiang (2022) Outage Performance Enhancement for NOMA Based Cooperative Relay Sharing Networks. IEEE Wireless Communications Letters, 11 (12): 12. pp. 2665-2669. ISSN 2162-2337

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Abstract

This letter considers a non-orthogonal multiple access (NOMA) based cooperative relay sharing (CRS) network, where two sources communicate with their corresponding users over the same time and frequency via a shared decode-and-forward relay. A novel transmission scheme using max-min criterion based dynamic decoding order strategy is proposed to minimize the outage probability of the network at the cost of lower complexity and overhead. The closed-form expression of the overall outage probability for the proposed scheme is derived. Both analytical and simulation results show that the proposed scheme can achieve non-zero diversity order and almost the same outage performance as the dynamic power allocation based transmission scheme for NOMA based CRS networks.