Coordinated beamforming for cognitive multi-cell networks with wiretap channels
Owing to the coupling among the vectors to be optimized，the problem becomes non-convex and non-linear.Accordingly，a centralized coordinated beamforming design method was proposed by constraining the leakage interference and using the semi-definite relaxation，and on the base of it，a decentralized alg...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2014-11-01
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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.2014.11.010/ |
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| _version_ | 1850122494784045056 |
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| author | Dong-hua CHEN Xiu-xiu ZHANG Wei-bo XIE |
| author_facet | Dong-hua CHEN Xiu-xiu ZHANG Wei-bo XIE |
| author_sort | Dong-hua CHEN |
| collection | DOAJ |
| description | Owing to the coupling among the vectors to be optimized，the problem becomes non-convex and non-linear.Accordingly，a centralized coordinated beamforming design method was proposed by constraining the leakage interference and using the semi-definite relaxation，and on the base of it，a decentralized algorithm was also proposed by decomposing the centralized design problem into a group of sub-problems on each cell’s base by using dual decomposition.Simulation results show that the proposed schemes make effective reduction in power consumption while guarantee the legal users’ secrecy rate requirement and the cognitive interference constraint.Moreover，the proposed decentralized method not only reduces the computational complexity，but also has the same performance as the centralized algorithm. |
| format | Article |
| id | doaj-art-e2238ca6dc974ea5ba387b78c5ec3783 |
| institution | OA Journals |
| issn | 1000-436X |
| language | zho |
| publishDate | 2014-11-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-e2238ca6dc974ea5ba387b78c5ec37832025-08-20T02:34:49ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2014-11-0135899559686229Coordinated beamforming for cognitive multi-cell networks with wiretap channelsDong-hua CHENXiu-xiu ZHANGWei-bo XIEOwing to the coupling among the vectors to be optimized，the problem becomes non-convex and non-linear.Accordingly，a centralized coordinated beamforming design method was proposed by constraining the leakage interference and using the semi-definite relaxation，and on the base of it，a decentralized algorithm was also proposed by decomposing the centralized design problem into a group of sub-problems on each cell’s base by using dual decomposition.Simulation results show that the proposed schemes make effective reduction in power consumption while guarantee the legal users’ secrecy rate requirement and the cognitive interference constraint.Moreover，the proposed decentralized method not only reduces the computational complexity，but also has the same performance as the centralized algorithm.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2014.11.010/physical layer securitycognitive radio networksmulti-cellbeamformingdistributed |
| spellingShingle | Dong-hua CHEN Xiu-xiu ZHANG Wei-bo XIE Coordinated beamforming for cognitive multi-cell networks with wiretap channels Tongxin xuebao physical layer security cognitive radio networks multi-cell beamforming distributed |
| title | Coordinated beamforming for cognitive multi-cell networks with wiretap channels |
| title_full | Coordinated beamforming for cognitive multi-cell networks with wiretap channels |
| title_fullStr | Coordinated beamforming for cognitive multi-cell networks with wiretap channels |
| title_full_unstemmed | Coordinated beamforming for cognitive multi-cell networks with wiretap channels |
| title_short | Coordinated beamforming for cognitive multi-cell networks with wiretap channels |
| title_sort | coordinated beamforming for cognitive multi cell networks with wiretap channels |
| topic | physical layer security cognitive radio networks multi-cell beamforming distributed |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2014.11.010/ |
| work_keys_str_mv | AT donghuachen coordinatedbeamformingforcognitivemulticellnetworkswithwiretapchannels AT xiuxiuzhang coordinatedbeamformingforcognitivemulticellnetworkswithwiretapchannels AT weiboxie coordinatedbeamformingforcognitivemulticellnetworkswithwiretapchannels |