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- Publisher Website: 10.1109/TWC.2017.2767601
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Article: Hybrid Half-Duplex/Full-Duplex Cooperative Non-Orthogonal Multiple Access with Transmit Power Adaptation
Title | Hybrid Half-Duplex/Full-Duplex Cooperative Non-Orthogonal Multiple Access with Transmit Power Adaptation |
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Authors | |
Keywords | 5G cooperative NOMA full-duplex relaying half-duplex relaying power allocation |
Issue Date | 2018 |
Citation | IEEE Transactions on Wireless Communications, 2018, v. 17, n. 1, p. 506-519 How to Cite? |
Abstract | Power allocation is an important issue in order to optimize the performance of non-orthogonal multiple access (NOMA) systems. However, the power allocation problem for cooperative NOMA systems has not been well investigated. In this paper, we investigate the power allocation problems for half-duplex cooperative NOMA (HD-CNOMA) and full-duplex cooperative NOMA (FD-CNOMA) systems, respectively. From the fairness standpoint, the optimization problem for each system is formulated to maximize the minimum achievable user rate in a NOMA user pair. Even though both of the formulated problems are neither concave nor quasi-concave, the optimal closed-form solutions of both cases are still obtained with the proposed two-step method. First, we transform the initial problem into a quasi-concave problem by treating the relay transmit power, namely P R, as a constant, and then solve the obtained quasi-concave problem. Second, we convert the original problem into a univariate problem of PR based on the results of the first step, and eventually obtain the optimal power allocation. In addition, a hybrid half/full-duplex cooperative NOMA scheme, which dynamically switches between the HD-CNOMA and FD-CNOMA mode, is proposed. After that, a relay selection scheme is also investigated to extend the hybrid scheme into general networks with multiple users. Numerical results demonstrate that the proposed hybrid relaying scheme can achieve a significant performance improvement with respect to the conventional NOMA, HD-CNOMA, and FD-CNOMA scheme. |
Persistent Identifier | http://hdl.handle.net/10722/316482 |
ISSN | 2023 Impact Factor: 8.9 2023 SCImago Journal Rankings: 5.371 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Liu, Gang | - |
dc.contributor.author | Chen, Xianhao | - |
dc.contributor.author | Ding, Zhiguo | - |
dc.contributor.author | Ma, Zheng | - |
dc.contributor.author | Yu, F. Richard | - |
dc.date.accessioned | 2022-09-14T11:40:33Z | - |
dc.date.available | 2022-09-14T11:40:33Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | IEEE Transactions on Wireless Communications, 2018, v. 17, n. 1, p. 506-519 | - |
dc.identifier.issn | 1536-1276 | - |
dc.identifier.uri | http://hdl.handle.net/10722/316482 | - |
dc.description.abstract | Power allocation is an important issue in order to optimize the performance of non-orthogonal multiple access (NOMA) systems. However, the power allocation problem for cooperative NOMA systems has not been well investigated. In this paper, we investigate the power allocation problems for half-duplex cooperative NOMA (HD-CNOMA) and full-duplex cooperative NOMA (FD-CNOMA) systems, respectively. From the fairness standpoint, the optimization problem for each system is formulated to maximize the minimum achievable user rate in a NOMA user pair. Even though both of the formulated problems are neither concave nor quasi-concave, the optimal closed-form solutions of both cases are still obtained with the proposed two-step method. First, we transform the initial problem into a quasi-concave problem by treating the relay transmit power, namely P R, as a constant, and then solve the obtained quasi-concave problem. Second, we convert the original problem into a univariate problem of PR based on the results of the first step, and eventually obtain the optimal power allocation. In addition, a hybrid half/full-duplex cooperative NOMA scheme, which dynamically switches between the HD-CNOMA and FD-CNOMA mode, is proposed. After that, a relay selection scheme is also investigated to extend the hybrid scheme into general networks with multiple users. Numerical results demonstrate that the proposed hybrid relaying scheme can achieve a significant performance improvement with respect to the conventional NOMA, HD-CNOMA, and FD-CNOMA scheme. | - |
dc.language | eng | - |
dc.relation.ispartof | IEEE Transactions on Wireless Communications | - |
dc.subject | 5G | - |
dc.subject | cooperative NOMA | - |
dc.subject | full-duplex relaying | - |
dc.subject | half-duplex relaying | - |
dc.subject | power allocation | - |
dc.title | Hybrid Half-Duplex/Full-Duplex Cooperative Non-Orthogonal Multiple Access with Transmit Power Adaptation | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1109/TWC.2017.2767601 | - |
dc.identifier.scopus | eid_2-s2.0-85033723918 | - |
dc.identifier.volume | 17 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | 506 | - |
dc.identifier.epage | 519 | - |
dc.identifier.isi | WOS:000422945400037 | - |