Artificial noise aided secure beamforming for multi-antenna relay systems
In the amplify-and-forward (AF) relay systems，the confidential information forwarded by the relay can be intercepted by the eavesdroppers.For guaranteeing the secure communications，an artificial noise aided secure beamforming method is proposed.The goal is to maximize the secrecy rate of the system...
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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 |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2014.11.009/ |
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| _version_ | 1841539725640335360 |
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| author | Li-jian ZHANG Liang JIN Lu LIU Wen-yu LUO |
| author_facet | Li-jian ZHANG Liang JIN Lu LIU Wen-yu LUO |
| author_sort | Li-jian ZHANG |
| collection | DOAJ |
| description | In the amplify-and-forward (AF) relay systems，the confidential information forwarded by the relay can be intercepted by the eavesdroppers.For guaranteeing the secure communications，an artificial noise aided secure beamforming method is proposed.The goal is to maximize the secrecy rate of the system by jointly designing the beamforming matrix and the artificial noise (AN) covariance matrix at the relay subject to the total power and the per-antenna power constraints.This non-convex secrecy rate maximization (SRM) problem can be recast as a two-level optimization problem.The outer part can be solved by performing a one-dimensional search，and the inner part can be handled by the semidefinite relaxation (SDR) technique and interior-point methods.It is shown that there always exists a rank-one optimal solution for the SDR problem，i.e.，the relaxation is tight to the original problem.Simulation results demonstrate that the proposed method can improve the security performance of the system significantly. |
| format | Article |
| id | doaj-art-4a8c37d2601b4b86b2fe004a16dec5f7 |
| institution | Kabale University |
| 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-4a8c37d2601b4b86b2fe004a16dec5f72025-01-14T06:44:10ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2014-11-0135818859686228Artificial noise aided secure beamforming for multi-antenna relay systemsLi-jian ZHANGLiang JINLu LIUWen-yu LUOIn the amplify-and-forward (AF) relay systems，the confidential information forwarded by the relay can be intercepted by the eavesdroppers.For guaranteeing the secure communications，an artificial noise aided secure beamforming method is proposed.The goal is to maximize the secrecy rate of the system by jointly designing the beamforming matrix and the artificial noise (AN) covariance matrix at the relay subject to the total power and the per-antenna power constraints.This non-convex secrecy rate maximization (SRM) problem can be recast as a two-level optimization problem.The outer part can be solved by performing a one-dimensional search，and the inner part can be handled by the semidefinite relaxation (SDR) technique and interior-point methods.It is shown that there always exists a rank-one optimal solution for the SDR problem，i.e.，the relaxation is tight to the original problem.Simulation results demonstrate that the proposed method can improve the security performance of the system significantly.http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2014.11.009/amplify-and-forwardartificial noisebeamformingsecrecy rate maximizationsemidefinite programming |
| spellingShingle | Li-jian ZHANG Liang JIN Lu LIU Wen-yu LUO Artificial noise aided secure beamforming for multi-antenna relay systems Tongxin xuebao amplify-and-forward artificial noise beamforming secrecy rate maximization semidefinite programming |
| title | Artificial noise aided secure beamforming for multi-antenna relay systems |
| title_full | Artificial noise aided secure beamforming for multi-antenna relay systems |
| title_fullStr | Artificial noise aided secure beamforming for multi-antenna relay systems |
| title_full_unstemmed | Artificial noise aided secure beamforming for multi-antenna relay systems |
| title_short | Artificial noise aided secure beamforming for multi-antenna relay systems |
| title_sort | artificial noise aided secure beamforming for multi antenna relay systems |
| topic | amplify-and-forward artificial noise beamforming secrecy rate maximization semidefinite programming |
| url | http://www.joconline.com.cn/zh/article/doi/10.11959/j.issn.1000-436x.2014.11.009/ |
| work_keys_str_mv | AT lijianzhang artificialnoiseaidedsecurebeamformingformultiantennarelaysystems AT liangjin artificialnoiseaidedsecurebeamformingformultiantennarelaysystems AT luliu artificialnoiseaidedsecurebeamformingformultiantennarelaysystems AT wenyuluo artificialnoiseaidedsecurebeamformingformultiantennarelaysystems |