Upper bound of degrees of freedom in cognitive MIMO interference network with user cooperation
In(K+1)-user cognitive MIMO interference network,conventional algorithms distinguish the interference of primary users and secondary users by aligning them to the different interference space,separately.Therefore,it leads to the loss of spatial degrees of freedom(DoF).From the perspective of multipl...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2015-08-01
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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.2015206/ |
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| author | Shi-lei ZHU Na-e ZHENG Sheng WANG Han-ying HU |
| author_facet | Shi-lei ZHU Na-e ZHENG Sheng WANG Han-ying HU |
| author_sort | Shi-lei ZHU |
| collection | DOAJ |
| description | In(K+1)-user cognitive MIMO interference network,conventional algorithms distinguish the interference of primary users and secondary users by aligning them to the different interference space,separately.Therefore,it leads to the loss of spatial degrees of freedom(DoF).From the perspective of multiplexing the interference space,a new upper bound of DoF and its necessary condition was deduced.Furthermore,to verify the rationality and validity of the new upper bound,a cooperative joint interference alignment algorithm,in which a joint interference alignment indicator was designed and proposed based on norm theory and Rayleigh-Ritz theorem.The effectiveness of the algorithm was analyzed.Theoretical analysis and simulation results show that the new upper bound of DoF breaks upper bound given in the existing papers,and it can be achieved by the proposed algorithm. |
| format | Article |
| id | doaj-art-35ff8a26d4f1428497982a7e20ad43cc |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2015-08-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-35ff8a26d4f1428497982a7e20ad43cc2025-01-14T06:53:25ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2015-08-013615316059695056Upper bound of degrees of freedom in cognitive MIMO interference network with user cooperationShi-lei ZHUNa-e ZHENGSheng WANGHan-ying HUIn(K+1)-user cognitive MIMO interference network,conventional algorithms distinguish the interference of primary users and secondary users by aligning them to the different interference space,separately.Therefore,it leads to the loss of spatial degrees of freedom(DoF).From the perspective of multiplexing the interference space,a new upper bound of DoF and its necessary condition was deduced.Furthermore,to verify the rationality and validity of the new upper bound,a cooperative joint interference alignment algorithm,in which a joint interference alignment indicator was designed and proposed based on norm theory and Rayleigh-Ritz theorem.The effectiveness of the algorithm was analyzed.Theoretical analysis and simulation results show that the new upper bound of DoF breaks upper bound given in the existing papers,and it can be achieved by the proposed algorithm.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2015206/cognitive MIMOuser cooperationinterference alignmentdegrees of freedom |
| spellingShingle | Shi-lei ZHU Na-e ZHENG Sheng WANG Han-ying HU Upper bound of degrees of freedom in cognitive MIMO interference network with user cooperation Tongxin xuebao cognitive MIMO user cooperation interference alignment degrees of freedom |
| title | Upper bound of degrees of freedom in cognitive MIMO interference network with user cooperation |
| title_full | Upper bound of degrees of freedom in cognitive MIMO interference network with user cooperation |
| title_fullStr | Upper bound of degrees of freedom in cognitive MIMO interference network with user cooperation |
| title_full_unstemmed | Upper bound of degrees of freedom in cognitive MIMO interference network with user cooperation |
| title_short | Upper bound of degrees of freedom in cognitive MIMO interference network with user cooperation |
| title_sort | upper bound of degrees of freedom in cognitive mimo interference network with user cooperation |
| topic | cognitive MIMO user cooperation interference alignment degrees of freedom |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2015206/ |
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