Amplify-and-forward virtual full-duplex relaying based cooperative NOMA

• Main Authors: Liau, Q. Y., Leow, C. Y., Ding, Z.
• Format: Article
• Published: Institute of Electrical and Electronics Engineers Inc. 2017
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.utm.my/id/eprint/77160/; https://www.scopus.com/inward/record.uri?eid=2-s2.0-85039792435&doi=10.1109%2fLWC.2017.2785303&partnerID=40&md5=6adf1dae50de256e8bf5405179e405b9

This letter studies the performance of a virtual full-duplex relaying technique in cooperative non-orthogonal multiple access (NOMA)-based systems. In particular, two half-duplex amplify-and-forward relays imitate the operation of full-duplex relaying in cooperative NOMA systems using the successive relaying (SR) technique, in order to recover the loss of spectral efficiency due to the half-duplex constraint at the relays. The closed-form outage probability of the proposed scheme is derived. The simulation results show that the proposed SR based cooperative NOMA system with an opportunistic power split factor achieves a lower outage probability and a higher ergodic rate than the existing SR based orthogonal multiple access (OMA) system and ideal full duplex relaying based NOMA systems.