文献类型：期刊文献

英文题名：Coordinated Direct and Relayed Transmission based on NOMA and Backscattering

作者：Fang, Zhaoxi[1];Lu, Yingzhi[1];Zhou, Jing[1];Li, Qi[1];Shi, Haiyan[1]

机构：[1]Shaoxing Univ, Dept Comp Sci & Engn, Shaoxing 312000, Peoples R China

年份：2022

卷号：16

期号：9

起止页码：3124

外文期刊名：KSII TRANSACTIONS ON INTERNET AND INFORMATION SYSTEMS

收录：SCI-EXPANDED(收录号：WOS:000886648400016)、、EI(收录号：20224212895991)、Scopus(收录号：2-s2.0-85139563936)、WOS

基金：This work was supported by the Zhejiang Provincial Basic Public Welfare Research Project under Grants No. LGF22F010006 and No. LGG22F010004, the Natural Science Foundation of Zhejiang Province under Grants No. LY19F020014 and No. LY22F020003, the National Natural Science Foundation of China under Grant No. 62002226, and the Humanities and Social Sciences Foundation of Ministry of Education of China under Grant no. 22A10349003.

语种：英文

外文关键词：Backscatter communication; coordinated direct and relayed transmission; NOMA

外文摘要：We propose a spectral-efficient coordinated direct and relayed transmission (CDRT) scheme for a relay-assisted downlink system with two users. The proposed scheme is based on backscatter communication (BC) and non-orthogonal multiple access (NOMA) technique. With the proposed BC-NOMA-CDRT scheme, both users can receive one packet within one time slot. In contrast, in existing NOMA-CDRT schemes, the far user is only able to receive one packet in two time slots due to the half-duplex operation of the relay. We investigate the outage of the BC-NOMA-CDRT scheme, and derive the outage probability expressions in closed-form based on Gamma distribution approximation and Gaussian approximation. Numerical results show that the analytical results are accurate and the BC-NOMA-CDRT scheme outperforms the conventional NOMA-CDRT significantly.