Design of fairness-driven RSMA-SDMA precoding
In view of the minimum user rate and system fairness when the transmit power was limited, a user access mode selection transmission strategy by joint rate-splitting multiple access (RSMA) and space division multiple access (SDMA) was proposed.The precoding design problem of maximizing system fairnes...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2022-04-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2022085/ |
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| _version_ | 1841539962059620352 |
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| author | Yanjing SUN Fengzhi CHENG Jiasi ZHOU Song LI |
| author_facet | Yanjing SUN Fengzhi CHENG Jiasi ZHOU Song LI |
| author_sort | Yanjing SUN |
| collection | DOAJ |
| description | In view of the minimum user rate and system fairness when the transmit power was limited, a user access mode selection transmission strategy by joint rate-splitting multiple access (RSMA) and space division multiple access (SDMA) was proposed.The precoding design problem of maximizing system fairness was modeled.In order to solve the discrete non-convex optimization problem formed, it was decomposed into two non-convex sub-problems, such as the user access mode selection and the inner optimal precoding design.For the precoding design, a quadratic transform of multidimensional and complex FP was used to transform the precoding design into double rotation, and the closed-form expression of the optimal solution for the outer user access mode selection was obtained.Convex optimization was used to solve the inner precoding design problem, and successively optimize the user access mode selection.An algorithm based on fractional optimization was proposed for the problem, and the optimal precoding vector was designed using the quadratic transform of multidimensional and complex FP to maximize the minimum user rate under power constraints.The simulation results prove that compared with RSMA, SDMA and other transmission strategies, the fairness-driven RSMA-SDMA precoding design improves the minimum user rate of the system and guarantees the system fairness. |
| format | Article |
| id | doaj-art-2e7c3093d9f34137bcb914aed0a49f6e |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2022-04-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-2e7c3093d9f34137bcb914aed0a49f6e2025-01-14T06:30:20ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2022-04-014317718559397010Design of fairness-driven RSMA-SDMA precodingYanjing SUNFengzhi CHENGJiasi ZHOUSong LIIn view of the minimum user rate and system fairness when the transmit power was limited, a user access mode selection transmission strategy by joint rate-splitting multiple access (RSMA) and space division multiple access (SDMA) was proposed.The precoding design problem of maximizing system fairness was modeled.In order to solve the discrete non-convex optimization problem formed, it was decomposed into two non-convex sub-problems, such as the user access mode selection and the inner optimal precoding design.For the precoding design, a quadratic transform of multidimensional and complex FP was used to transform the precoding design into double rotation, and the closed-form expression of the optimal solution for the outer user access mode selection was obtained.Convex optimization was used to solve the inner precoding design problem, and successively optimize the user access mode selection.An algorithm based on fractional optimization was proposed for the problem, and the optimal precoding vector was designed using the quadratic transform of multidimensional and complex FP to maximize the minimum user rate under power constraints.The simulation results prove that compared with RSMA, SDMA and other transmission strategies, the fairness-driven RSMA-SDMA precoding design improves the minimum user rate of the system and guarantees the system fairness.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2022085/RSMA-SDMAprecoding designsystem fairnessdouble rotation |
| spellingShingle | Yanjing SUN Fengzhi CHENG Jiasi ZHOU Song LI Design of fairness-driven RSMA-SDMA precoding Tongxin xuebao RSMA-SDMA precoding design system fairness double rotation |
| title | Design of fairness-driven RSMA-SDMA precoding |
| title_full | Design of fairness-driven RSMA-SDMA precoding |
| title_fullStr | Design of fairness-driven RSMA-SDMA precoding |
| title_full_unstemmed | Design of fairness-driven RSMA-SDMA precoding |
| title_short | Design of fairness-driven RSMA-SDMA precoding |
| title_sort | design of fairness driven rsma sdma precoding |
| topic | RSMA-SDMA precoding design system fairness double rotation |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2022085/ |
| work_keys_str_mv | AT yanjingsun designoffairnessdrivenrsmasdmaprecoding AT fengzhicheng designoffairnessdrivenrsmasdmaprecoding AT jiasizhou designoffairnessdrivenrsmasdmaprecoding AT songli designoffairnessdrivenrsmasdmaprecoding |