Paper Info
Title
Coordinated Direct and Relay Transmission With NOMA and Network Coding in Nakagami-<italic>m</italic> Fading Channels
Abstract
Although the use of coordinated direct and relay transmission (CDRT) in non-orthogonal multiple access (NOMA) can extend the coverage, its duplicated transmission reduces the spectrum efficiency (SE) of NOMA. To improve the SE, we propose a spectrum-efficient scheme for NOMA-based CDRT over Nakagami-m fading channels. In this scheme, the base station (BS) connects with a cell-center user (CCU) directly while communicating with a cell-edge user (CEU) via a relay and the CCU. Then, the relay and the CCU use network coding to process and retransmit the signals sent by the BS first and the CEU later. Finally, the BS and the relay simultaneously broadcast downlink signals. We derive the closed-form expressions for the average SE, the user fairness index and the energy efficiency (EE) as well as the asymptotic average SE using both perfect and imperfect successive interference cancellation (SIC). Simulations verify the correctness of our theoretical analysis and the superiority of the proposed scheme in SE and EE.
Year
DOI
Venue
2021
10.1109/TCOMM.2020.3025555
IEEE Transactions on Communications
Keywords
DocType
Volume
Coordinated direct and relay transmission,Nakagami-m fading,non-orthogonal multiple access (NOMA),spectrum efficiency,successive interference cancellation (SIC)
Journal
69
Issue
ISSN
Citations 
1
0090-6778
2
PageRank 
References 
Authors
0.36
0
7
Name
Order
Citations
PageRank
Y. Xu1139.41
Bo Li2615.69
Nan Zhao31591123.85
Yunfei Chen430628.07
Gang Wang5114.01
Zhiguo Ding67031399.47
Xianbin Wang72365223.86