文献类型：期刊文献

英文题名：Three-User Cooperative NOMA Transmission

作者：Fang, Zhaoxi[1,2];Hu, Jiang[2];Lu, Yingzhi[2];Ni, Wei[3]

机构：[1]Shaoxing Univ, Sch Mech & Elect Engn, Shaoxing 312000, Peoples R China;[2]Zhejiang Wanli Univ, Coll Informat & Intelligent Engn, Ningbo 315100, Peoples R China;[3]Commonwealth Sci & Ind Res Org, Sydney, NSW 2122, Australia

年份：2020

卷号：9

期号：4

起止页码：465

外文期刊名：IEEE WIRELESS COMMUNICATIONS LETTERS

收录：SCI-EXPANDED(收录号：WOS:000528582600009)、、EI(收录号：20201608458191)、Scopus(收录号：2-s2.0-85083278897)、WOS

基金：This work was supported in part by the Zhejiang Provincial Natural Science Foundation of China under Grant LY17F010002, and in part by the Public Welfare Project of Zhejiang Province under Grant 2017C31040.

语种：英文

外文关键词：Cooperative NOMA; decode-and-forward; asymptotic analysis

外文摘要：This letter presents a new downlink cooperative non-orthogonal multiple access (NOMA) transmission scheme to serve three users within only two time slots. The scheme involves a base station (BS), two direct-link users and one indirect-link user. The BS sends superposed signals to the two direct-link users which decode and forward the signals to the indirect-link user in an alternating fashion. Closed-form expression is derived for the sum-rate of the proposed scheme and a simple expression of sum-rate is also derived in the high signal-to-noise ratio (SNR) region. In the presence of strong inter-user interference (IUI), the proposed scheme can be applied by having each direct-link user to detect the IUI first and then cancel the IUI to decode the signals destined for the indirect-link user and itself. Simulation results show that the scheme with configurable decoding orders at the users is able to achieve a higher sum-rate than existing orthogonal multiple access (OMA) based alternatives.