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Coordinated direct and relay transmission with NOMA and network coding in Nakagami-m fading channel
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Xu, Y., Li, B., Zhao, N., Chen, Yunfei, Wang, G., Ding, Z. and Wang, X. (2021) Coordinated direct and relay transmission with NOMA and network coding in Nakagami-m fading channel. IEEE Transactions on Communications, 69 (1). pp. 207-222. doi:10.1109/TCOMM.2020.3025555
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Official URL: https://doi.org/10.1109/TCOMM.2020.3025555
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.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||
| Divisions: | Faculty of Science > Engineering | ||||||
| Library of Congress Subject Headings (LCSH): | Wireless communication systems | ||||||
| Journal or Publication Title: | IEEE Transactions on Communications | ||||||
| Publisher: | IEEE | ||||||
| ISSN: | 0090-6778 | ||||||
| Official Date: | January 2021 | ||||||
| Dates: |
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| Volume: | 69 | ||||||
| Number: | 1 | ||||||
| Page Range: | pp. 207-222 | ||||||
| DOI: | 10.1109/TCOMM.2020.3025555 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Publisher Statement: | © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
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