Semi-dynamic pilot allocation based on graph coloring in massive MIMO systems
To alleviate the performance loss caused by pilot contamination in massive multiple-input multiple-output (MIMO) systems,a semi-dynamic pilot allocation scheme based on graph coloring was proposed.Firstly,a pilot reuse threshold was derived for users.Then,based on the pilot reuse threshold,users of...
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| Format: | Article |
| Language: | zho |
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Beijing Xintong Media Co., Ltd
2020-11-01
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| Series: | Dianxin kexue |
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| Online Access: | http://www.telecomsci.com/zh/article/doi/10.11959/j.issn.1000-0801.2020184/ |
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| _version_ | 1841528928017055744 |
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| author | Fangmin XU Hui QIAN Haiyan CAO |
| author_facet | Fangmin XU Hui QIAN Haiyan CAO |
| author_sort | Fangmin XU |
| collection | DOAJ |
| description | To alleviate the performance loss caused by pilot contamination in massive multiple-input multiple-output (MIMO) systems,a semi-dynamic pilot allocation scheme based on graph coloring was proposed.Firstly,a pilot reuse threshold was derived for users.Then,based on the pilot reuse threshold,users of each cell are divided into cell-center users and cell-edge users,where cell-center users were allowed to reuse the same pilot.Finally,based on the graph coloring theory,the pilot resources were allocated to cell-edge users with serious pilot interference by multi-cell coordination.The simulation results show that the proposed pilot allocation scheme reduces the pilot interference and improves the uplink achievable rate of the whole system effectively. |
| format | Article |
| id | doaj-art-360260a1ca4443089c538ac3b46b643a |
| institution | Kabale University |
| issn | 1000-0801 |
| language | zho |
| publishDate | 2020-11-01 |
| publisher | Beijing Xintong Media Co., Ltd |
| record_format | Article |
| series | Dianxin kexue |
| spelling | doaj-art-360260a1ca4443089c538ac3b46b643a2025-01-15T03:32:02ZzhoBeijing Xintong Media Co., LtdDianxin kexue1000-08012020-11-0136394659813091Semi-dynamic pilot allocation based on graph coloring in massive MIMO systemsFangmin XUHui QIANHaiyan CAOTo alleviate the performance loss caused by pilot contamination in massive multiple-input multiple-output (MIMO) systems,a semi-dynamic pilot allocation scheme based on graph coloring was proposed.Firstly,a pilot reuse threshold was derived for users.Then,based on the pilot reuse threshold,users of each cell are divided into cell-center users and cell-edge users,where cell-center users were allowed to reuse the same pilot.Finally,based on the graph coloring theory,the pilot resources were allocated to cell-edge users with serious pilot interference by multi-cell coordination.The simulation results show that the proposed pilot allocation scheme reduces the pilot interference and improves the uplink achievable rate of the whole system effectively.http://www.telecomsci.com/zh/article/doi/10.11959/j.issn.1000-0801.2020184/massive MIMOpilot contaminationgraph coloringtotal achievable rate |
| spellingShingle | Fangmin XU Hui QIAN Haiyan CAO Semi-dynamic pilot allocation based on graph coloring in massive MIMO systems Dianxin kexue massive MIMO pilot contamination graph coloring total achievable rate |
| title | Semi-dynamic pilot allocation based on graph coloring in massive MIMO systems |
| title_full | Semi-dynamic pilot allocation based on graph coloring in massive MIMO systems |
| title_fullStr | Semi-dynamic pilot allocation based on graph coloring in massive MIMO systems |
| title_full_unstemmed | Semi-dynamic pilot allocation based on graph coloring in massive MIMO systems |
| title_short | Semi-dynamic pilot allocation based on graph coloring in massive MIMO systems |
| title_sort | semi dynamic pilot allocation based on graph coloring in massive mimo systems |
| topic | massive MIMO pilot contamination graph coloring total achievable rate |
| url | http://www.telecomsci.com/zh/article/doi/10.11959/j.issn.1000-0801.2020184/ |
| work_keys_str_mv | AT fangminxu semidynamicpilotallocationbasedongraphcoloringinmassivemimosystems AT huiqian semidynamicpilotallocationbasedongraphcoloringinmassivemimosystems AT haiyancao semidynamicpilotallocationbasedongraphcoloringinmassivemimosystems |