Relay-Aided Uplink NOMA Under Non-Orthogonal CCI and Imperfect SIC in 6G Networks
Sixth generation (6G) networks must guarantee radio-resource availability for coexisting users and machines. Here, non-orthogonal multiple access (NOMA) can address resource limitations by serving multiple devices on the same spectral and temporal resources. Meanwhile, cooperative relays can mitigat...
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IEEE
2024-01-01
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| Series: | IEEE Open Journal of Vehicular Technology |
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| Online Access: | https://ieeexplore.ieee.org/document/10508052/ |
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| author | Volkan Ozduran Nikolaos Nomikos Ehsan Soleimani-Nasab Imran Shafique Ansari Panagiotis Trakadas |
| author_facet | Volkan Ozduran Nikolaos Nomikos Ehsan Soleimani-Nasab Imran Shafique Ansari Panagiotis Trakadas |
| author_sort | Volkan Ozduran |
| collection | DOAJ |
| description | Sixth generation (6G) networks must guarantee radio-resource availability for coexisting users and machines. Here, non-orthogonal multiple access (NOMA) can address resource limitations by serving multiple devices on the same spectral and temporal resources. Meanwhile, cooperative relays can mitigate the impact with excessive large- and small-scale fading and interference. Still, to unlock the full potential of NOMA in 6G deployments, its performance must be analyzed under interference-limited scenarios with NOMA communications occuring across multiple cells. In this paper, the detrimental effect of co-channel interference (CCI) from nearby NOMA transmissions on a relay-aided NOMA network is examined. More specifically, randomly deployed CCI terminals communicate using NOMA and degrade the uplink communication. Network performance is thoroughly analyzed for various metrics, considering independent and identically distributed non-orthogonal CCI. Furthermore, for improved performance, transmit power, power allocation, and relay location optimization is presented. This scenario can correspond to Industry 4.0 settings, relying on private networks that can adjust the transmit power of interferers within the network. Our analytical findings are verified through Monte-Carlo simulations, revealing that non-orthogonal CCI degrades the system performance, causing system coding gain losses. Nonetheless, the proposed optimization framework can mitigate the impact of non-orthogonal CCI and ensure improved uplink performance. |
| format | Article |
| id | doaj-art-fc4e235f48fc40f9967657ce7052194d |
| institution | Kabale University |
| issn | 2644-1330 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Vehicular Technology |
| spelling | doaj-art-fc4e235f48fc40f9967657ce7052194d2025-01-30T00:04:13ZengIEEEIEEE Open Journal of Vehicular Technology2644-13302024-01-01565868010.1109/OJVT.2024.339295110508052Relay-Aided Uplink NOMA Under Non-Orthogonal CCI and Imperfect SIC in 6G NetworksVolkan Ozduran0https://orcid.org/0000-0002-9442-9099Nikolaos Nomikos1https://orcid.org/0000-0002-9210-9796Ehsan Soleimani-Nasab2https://orcid.org/0000-0002-7205-4628Imran Shafique Ansari3https://orcid.org/0000-0001-8461-6547Panagiotis Trakadas4https://orcid.org/0000-0002-5146-5954İstanbul University-Cerrahpaşa, Istanbul, TürkiyeDepartment of Ports Management and Shipping, National and Kapodistrian University of Athens, Euboea, GreeceDepartment of Electrical and Computer Engineering, Graduate University of Advanced Technology, Kerman, IranJames Watt School of Engineering, University of Glasgow, Glasgow, U.K.Department of Ports Management and Shipping, National and Kapodistrian University of Athens, Euboea, GreeceSixth generation (6G) networks must guarantee radio-resource availability for coexisting users and machines. Here, non-orthogonal multiple access (NOMA) can address resource limitations by serving multiple devices on the same spectral and temporal resources. Meanwhile, cooperative relays can mitigate the impact with excessive large- and small-scale fading and interference. Still, to unlock the full potential of NOMA in 6G deployments, its performance must be analyzed under interference-limited scenarios with NOMA communications occuring across multiple cells. In this paper, the detrimental effect of co-channel interference (CCI) from nearby NOMA transmissions on a relay-aided NOMA network is examined. More specifically, randomly deployed CCI terminals communicate using NOMA and degrade the uplink communication. Network performance is thoroughly analyzed for various metrics, considering independent and identically distributed non-orthogonal CCI. Furthermore, for improved performance, transmit power, power allocation, and relay location optimization is presented. This scenario can correspond to Industry 4.0 settings, relying on private networks that can adjust the transmit power of interferers within the network. Our analytical findings are verified through Monte-Carlo simulations, revealing that non-orthogonal CCI degrades the system performance, causing system coding gain losses. Nonetheless, the proposed optimization framework can mitigate the impact of non-orthogonal CCI and ensure improved uplink performance.https://ieeexplore.ieee.org/document/10508052/Sixth generation (6G)co-channel interference (CCI)cooperative relayingnon-orthogonal multiple access (NOMA)performance analysis |
| spellingShingle | Volkan Ozduran Nikolaos Nomikos Ehsan Soleimani-Nasab Imran Shafique Ansari Panagiotis Trakadas Relay-Aided Uplink NOMA Under Non-Orthogonal CCI and Imperfect SIC in 6G Networks IEEE Open Journal of Vehicular Technology Sixth generation (6G) co-channel interference (CCI) cooperative relaying non-orthogonal multiple access (NOMA) performance analysis |
| title | Relay-Aided Uplink NOMA Under Non-Orthogonal CCI and Imperfect SIC in 6G Networks |
| title_full | Relay-Aided Uplink NOMA Under Non-Orthogonal CCI and Imperfect SIC in 6G Networks |
| title_fullStr | Relay-Aided Uplink NOMA Under Non-Orthogonal CCI and Imperfect SIC in 6G Networks |
| title_full_unstemmed | Relay-Aided Uplink NOMA Under Non-Orthogonal CCI and Imperfect SIC in 6G Networks |
| title_short | Relay-Aided Uplink NOMA Under Non-Orthogonal CCI and Imperfect SIC in 6G Networks |
| title_sort | relay aided uplink noma under non orthogonal cci and imperfect sic in 6g networks |
| topic | Sixth generation (6G) co-channel interference (CCI) cooperative relaying non-orthogonal multiple access (NOMA) performance analysis |
| url | https://ieeexplore.ieee.org/document/10508052/ |
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