Hybrid precoding based on distributed partially-connected structure for multiuser massive MIMO
For multiuser massive multiple-input multiple-output (MIMO) systems, to solve the problem of underutilized spatial resources caused by centralized partially-connected structure (PCS) and fixed-matching phase-control algorithm in conventional schemes, a low complexity phased zero-forcing (PZF) hybrid...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2022-01-01
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| Series: | Tongxin xuebao |
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| Online Access: | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2022008/ |
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| author | Lei ZHANG Qin WANG |
| author_facet | Lei ZHANG Qin WANG |
| author_sort | Lei ZHANG |
| collection | DOAJ |
| description | For multiuser massive multiple-input multiple-output (MIMO) systems, to solve the problem of underutilized spatial resources caused by centralized partially-connected structure (PCS) and fixed-matching phase-control algorithm in conventional schemes, a low complexity phased zero-forcing (PZF) hybrid precoding scheme based on distributed PCS was proposed.The logical antenna subarrays with more than the number of radio frequency (RF) chains were designed, so that each RF chain could be connected to multiple distributed subarrays to provide higher spatial diversity gain.Further, by analyzing the influence of phase-control analog precoding on zero-forcing digital precoding, a phase-control analog precoding algorithm via successively maximizing users’ total subarray gains was proposed to maximize the upper bound of system spectral efficiency.Analysis and simulation results show that, compared with the conventional schemes, the proposed scheme can significantly improve the system spectral efficiency while slightly increases the computational complexity, and it is also insensitive to imperfect channel state information. |
| format | Article |
| id | doaj-art-0c242798d5a74f2db5498516c7519f82 |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2022-01-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-0c242798d5a74f2db5498516c7519f822025-01-14T06:30:28ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2022-01-014310411659398437Hybrid precoding based on distributed partially-connected structure for multiuser massive MIMOLei ZHANGQin WANGFor multiuser massive multiple-input multiple-output (MIMO) systems, to solve the problem of underutilized spatial resources caused by centralized partially-connected structure (PCS) and fixed-matching phase-control algorithm in conventional schemes, a low complexity phased zero-forcing (PZF) hybrid precoding scheme based on distributed PCS was proposed.The logical antenna subarrays with more than the number of radio frequency (RF) chains were designed, so that each RF chain could be connected to multiple distributed subarrays to provide higher spatial diversity gain.Further, by analyzing the influence of phase-control analog precoding on zero-forcing digital precoding, a phase-control analog precoding algorithm via successively maximizing users’ total subarray gains was proposed to maximize the upper bound of system spectral efficiency.Analysis and simulation results show that, compared with the conventional schemes, the proposed scheme can significantly improve the system spectral efficiency while slightly increases the computational complexity, and it is also insensitive to imperfect channel state information.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2022008/massive MIMOhybrid precodingpartially-connected structurephase-control analog precodingsubarray gain |
| spellingShingle | Lei ZHANG Qin WANG Hybrid precoding based on distributed partially-connected structure for multiuser massive MIMO Tongxin xuebao massive MIMO hybrid precoding partially-connected structure phase-control analog precoding subarray gain |
| title | Hybrid precoding based on distributed partially-connected structure for multiuser massive MIMO |
| title_full | Hybrid precoding based on distributed partially-connected structure for multiuser massive MIMO |
| title_fullStr | Hybrid precoding based on distributed partially-connected structure for multiuser massive MIMO |
| title_full_unstemmed | Hybrid precoding based on distributed partially-connected structure for multiuser massive MIMO |
| title_short | Hybrid precoding based on distributed partially-connected structure for multiuser massive MIMO |
| title_sort | hybrid precoding based on distributed partially connected structure for multiuser massive mimo |
| topic | massive MIMO hybrid precoding partially-connected structure phase-control analog precoding subarray gain |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2022008/ |
| work_keys_str_mv | AT leizhang hybridprecodingbasedondistributedpartiallyconnectedstructureformultiusermassivemimo AT qinwang hybridprecodingbasedondistributedpartiallyconnectedstructureformultiusermassivemimo |