Pilot interference mitigation for TDD cell-free massive MIMO systems
To alleviate the pilot interference for cell-free massive multi-input multi-output (MIMO) system and improve system’s performance, a comprehensive approach including the pilot reuse, access point (AP) selection and power allocation was proposed.Firstly, to alleviate the pilot contamination, the pilo...
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| Format: | Article |
| Language: | zho |
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Beijing Xintong Media Co., Ltd
2022-05-01
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| Series: | Dianxin kexue |
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| Online Access: | http://www.telecomsci.com/zh/article/doi/10.11959/j.issn.1000-0801.2022071/ |
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| _version_ | 1841529004130041856 |
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| author | Yue WANG Fangmin XU Haiyan CAO |
| author_facet | Yue WANG Fangmin XU Haiyan CAO |
| author_sort | Yue WANG |
| collection | DOAJ |
| description | To alleviate the pilot interference for cell-free massive multi-input multi-output (MIMO) system and improve system’s performance, a comprehensive approach including the pilot reuse, access point (AP) selection and power allocation was proposed.Firstly, to alleviate the pilot contamination, the pilot assignment based on the order of user distance was proposed, in which the pilot sharing was only allowed when the distance between two users is large enough to reduce the impact of pilot reuse.Then, by AP selection, only the APs which have main impact on the macro diversity gain were selected as the user’s serving APs.Finally, a modified max-min power control algorithm was proposed to improve the system’s average throughput.Simulation results show that the pilot interference mitigation strategy proposed improves the performance of the system significantly. |
| format | Article |
| id | doaj-art-37336ec45b644f2c94e862392b128813 |
| institution | Kabale University |
| issn | 1000-0801 |
| language | zho |
| publishDate | 2022-05-01 |
| publisher | Beijing Xintong Media Co., Ltd |
| record_format | Article |
| series | Dianxin kexue |
| spelling | doaj-art-37336ec45b644f2c94e862392b1288132025-01-15T03:27:06ZzhoBeijing Xintong Media Co., LtdDianxin kexue1000-08012022-05-0138879459810797Pilot interference mitigation for TDD cell-free massive MIMO systemsYue WANGFangmin XUHaiyan CAOTo alleviate the pilot interference for cell-free massive multi-input multi-output (MIMO) system and improve system’s performance, a comprehensive approach including the pilot reuse, access point (AP) selection and power allocation was proposed.Firstly, to alleviate the pilot contamination, the pilot assignment based on the order of user distance was proposed, in which the pilot sharing was only allowed when the distance between two users is large enough to reduce the impact of pilot reuse.Then, by AP selection, only the APs which have main impact on the macro diversity gain were selected as the user’s serving APs.Finally, a modified max-min power control algorithm was proposed to improve the system’s average throughput.Simulation results show that the pilot interference mitigation strategy proposed improves the performance of the system significantly.http://www.telecomsci.com/zh/article/doi/10.11959/j.issn.1000-0801.2022071/cell-free massive MIMOpilot reusepilot contaminationAP selectionpower control |
| spellingShingle | Yue WANG Fangmin XU Haiyan CAO Pilot interference mitigation for TDD cell-free massive MIMO systems Dianxin kexue cell-free massive MIMO pilot reuse pilot contamination AP selection power control |
| title | Pilot interference mitigation for TDD cell-free massive MIMO systems |
| title_full | Pilot interference mitigation for TDD cell-free massive MIMO systems |
| title_fullStr | Pilot interference mitigation for TDD cell-free massive MIMO systems |
| title_full_unstemmed | Pilot interference mitigation for TDD cell-free massive MIMO systems |
| title_short | Pilot interference mitigation for TDD cell-free massive MIMO systems |
| title_sort | pilot interference mitigation for tdd cell free massive mimo systems |
| topic | cell-free massive MIMO pilot reuse pilot contamination AP selection power control |
| url | http://www.telecomsci.com/zh/article/doi/10.11959/j.issn.1000-0801.2022071/ |
| work_keys_str_mv | AT yuewang pilotinterferencemitigationfortddcellfreemassivemimosystems AT fangminxu pilotinterferencemitigationfortddcellfreemassivemimosystems AT haiyancao pilotinterferencemitigationfortddcellfreemassivemimosystems |