Performance analysis of cooperative NOMA with a shared AF relay. Issue 19 (19th October 2018)

• Record Type: Journal Article
• Authors: Li, Yan; Li, Yongzhao; Chen, Yunfei; Ye, Yinghui; Zhang, Hailin
• Is Part Of: IET communications. Volume 12:Issue 19(2018)
• Page Start: 2438
• Page End: 2447
• Publication Date: 2018-10-19
• Subjects: probability -- multi‐access systems -- cooperative communication -- relay networks (telecommunication) -- amplify and forward communication -- approximation theory -- diversity reception -- 5G mobile communication -- telecommunication network reliability; ergodic sum capacity -- shared AF relay -- fifth generation wireless networks -- orthogonal multiple access techniques -- nonorthogonal multiple access techniques -- cooperative NOMA‐AF‐CRS techniques -- cooperative relaying scheme -- amplify‐and‐forward relay -- closed‐form approximations -- probability -- signal‐to‐noise ratio region; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2018.5415
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : Non‐orthogonal multiple access (NOMA) has been proposed as a promising technique for the fifth generation wireless networks. In this study, the authors investigate the performance of a cooperative relaying scheme using NOMA (termed NOMA‐AF‐CRS), where two sources communicate with their corresponding destinations over the same frequency simultaneously through a shared amplify‐and‐forward (AF) relay. First, the closed‐form approximations are derived for the outage probability. The analytical results are further evaluated in the high signal‐to‐noise ratio region to characterise the diversity order achieved by the system. Then, the ergodic sum capacity of NOMA‐AF‐CRS is analysed and an upper bound to the ergodic sum capacity is derived. Finally, simulation results are presented to verify the proposed analysis and demonstrate the advantages of NOMA‐AF‐CRS over the conventional orthogonal multiple access techniques.