Feedback bit allocation in distributed antenna array systems
In a frequency division duplex communication system,precoding at the base station usually requires terminal feedback channel state information.In a distributed array system,the channel conditions between the terminal and different access nodes in the cell are different because multiple access nodes...
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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.1000-0801.2020300/ |
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| _version_ | 1841528977952342016 |
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| author | Shuai ZHANG Peng PAN Cui WANG |
| author_facet | Shuai ZHANG Peng PAN Cui WANG |
| author_sort | Shuai ZHANG |
| collection | DOAJ |
| description | In a frequency division duplex communication system,precoding at the base station usually requires terminal feedback channel state information.In a distributed array system,the channel conditions between the terminal and different access nodes in the cell are different because multiple access nodes are arranged at different locations in the cell.When the resources for feedback channel state information are limited,the allocation method of feedback bit needs to be optimized to improve the overall performance of the system.In a multi-user distributed array system,an access node selection method based on distance threshold was adopted.Based on this method,the quantization characteristics of the random vector quantization codebook and the Taylor expansion method were used to derive the system quantization capacity loss,and then an approximate expression was given.Based on this expression,a feedback bit allocation method was proposed.Compared with other allocation methods,the method of this paper was more universal because it did not limit the number of access nodes selected by the user.The simulation results show that the strategy proposed is superior to the traditional equal-bit allocation scheme and can obtain better performance when the feedback resources are limited. |
| format | Article |
| id | doaj-art-f40a120d9dc64c5aa1a6cb5e802ccd68 |
| 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-f40a120d9dc64c5aa1a6cb5e802ccd682025-01-15T03:32:04ZzhoBeijing Xintong Media Co., LtdDianxin kexue1000-08012020-11-0136798859813213Feedback bit allocation in distributed antenna array systemsShuai ZHANGPeng PANCui WANGIn a frequency division duplex communication system,precoding at the base station usually requires terminal feedback channel state information.In a distributed array system,the channel conditions between the terminal and different access nodes in the cell are different because multiple access nodes are arranged at different locations in the cell.When the resources for feedback channel state information are limited,the allocation method of feedback bit needs to be optimized to improve the overall performance of the system.In a multi-user distributed array system,an access node selection method based on distance threshold was adopted.Based on this method,the quantization characteristics of the random vector quantization codebook and the Taylor expansion method were used to derive the system quantization capacity loss,and then an approximate expression was given.Based on this expression,a feedback bit allocation method was proposed.Compared with other allocation methods,the method of this paper was more universal because it did not limit the number of access nodes selected by the user.The simulation results show that the strategy proposed is superior to the traditional equal-bit allocation scheme and can obtain better performance when the feedback resources are limited.http://www.telecomsci.com/zh/article/doi/10.11959/j.issn.1000-0801.2020300/distributed antenna arraylimited feedbackmulti-userbit allocationprecoding |
| spellingShingle | Shuai ZHANG Peng PAN Cui WANG Feedback bit allocation in distributed antenna array systems Dianxin kexue distributed antenna array limited feedback multi-user bit allocation precoding |
| title | Feedback bit allocation in distributed antenna array systems |
| title_full | Feedback bit allocation in distributed antenna array systems |
| title_fullStr | Feedback bit allocation in distributed antenna array systems |
| title_full_unstemmed | Feedback bit allocation in distributed antenna array systems |
| title_short | Feedback bit allocation in distributed antenna array systems |
| title_sort | feedback bit allocation in distributed antenna array systems |
| topic | distributed antenna array limited feedback multi-user bit allocation precoding |
| url | http://www.telecomsci.com/zh/article/doi/10.11959/j.issn.1000-0801.2020300/ |
| work_keys_str_mv | AT shuaizhang feedbackbitallocationindistributedantennaarraysystems AT pengpan feedbackbitallocationindistributedantennaarraysystems AT cuiwang feedbackbitallocationindistributedantennaarraysystems |