Joint optimization of beamforming and power allocation for DAJ‐based untrusted relay networks
Destination‐assisted jamming (DAJ) is usually used to protect confidential information against untrusted relays and eavesdroppers in wireless networks. In this paper, a DAJ‐based untrusted relay network with multiple antennas installed is presented. To increase the secrecy, a joint optimization of b...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Electronics and Telecommunications Research Institute (ETRI)
2018-10-01
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| Series: | ETRI Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.4218/etrij.2018-0145 |
| _version_ | 1818261182108139520 |
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| author | Rugui Yao Yanan Lu Tamer Mekkawy Fei Xu Xiaoya Zuo |
| author_facet | Rugui Yao Yanan Lu Tamer Mekkawy Fei Xu Xiaoya Zuo |
| author_sort | Rugui Yao |
| collection | DOAJ |
| description | Destination‐assisted jamming (DAJ) is usually used to protect confidential information against untrusted relays and eavesdroppers in wireless networks. In this paper, a DAJ‐based untrusted relay network with multiple antennas installed is presented. To increase the secrecy, a joint optimization of beamforming and power allocation at the source and destination is studied. A matched‐filter precoder is introduced to maximize the cooperative jamming signal by directing cooperative jamming signals toward untrusted relays. Then, based on generalized singular‐value decomposition (GSVD), a novel transmitted precoder for confidential signals is devised to align the signal into the subspace corresponding to the confidential transmission channel. To decouple the precoder design and optimal power allocation, an iterative algorithm is proposed to jointly optimize the above parameters. Numerical results validate the effectiveness of the proposed scheme. Compared with other schemes, the proposed scheme shows significant improvement in terms of security performance. |
| first_indexed | 2024-12-12T18:43:09Z |
| format | Article |
| id | doaj.art-b42ed1e5f7ec4c40b12e6b5fbc1fc46c |
| institution | Directory Open Access Journal |
| issn | 1225-6463 2233-7326 |
| language | English |
| last_indexed | 2024-12-12T18:43:09Z |
| publishDate | 2018-10-01 |
| publisher | Electronics and Telecommunications Research Institute (ETRI) |
| record_format | Article |
| series | ETRI Journal |
| spelling | doaj.art-b42ed1e5f7ec4c40b12e6b5fbc1fc46c2022-12-22T00:15:36ZengElectronics and Telecommunications Research Institute (ETRI)ETRI Journal1225-64632233-73262018-10-0140671472510.4218/etrij.2018-014510.4218/etrij.2018-0145Joint optimization of beamforming and power allocation for DAJ‐based untrusted relay networksRugui YaoYanan LuTamer MekkawyFei XuXiaoya ZuoDestination‐assisted jamming (DAJ) is usually used to protect confidential information against untrusted relays and eavesdroppers in wireless networks. In this paper, a DAJ‐based untrusted relay network with multiple antennas installed is presented. To increase the secrecy, a joint optimization of beamforming and power allocation at the source and destination is studied. A matched‐filter precoder is introduced to maximize the cooperative jamming signal by directing cooperative jamming signals toward untrusted relays. Then, based on generalized singular‐value decomposition (GSVD), a novel transmitted precoder for confidential signals is devised to align the signal into the subspace corresponding to the confidential transmission channel. To decouple the precoder design and optimal power allocation, an iterative algorithm is proposed to jointly optimize the above parameters. Numerical results validate the effectiveness of the proposed scheme. Compared with other schemes, the proposed scheme shows significant improvement in terms of security performance.https://doi.org/10.4218/etrij.2018-0145destination‐assisted jammingoptimal power allocationphysical layer securitysecrecy rateuntrusted relay network |
| spellingShingle | Rugui Yao Yanan Lu Tamer Mekkawy Fei Xu Xiaoya Zuo Joint optimization of beamforming and power allocation for DAJ‐based untrusted relay networks ETRI Journal destination‐assisted jamming optimal power allocation physical layer security secrecy rate untrusted relay network |
| title | Joint optimization of beamforming and power allocation for DAJ‐based untrusted relay networks |
| title_full | Joint optimization of beamforming and power allocation for DAJ‐based untrusted relay networks |
| title_fullStr | Joint optimization of beamforming and power allocation for DAJ‐based untrusted relay networks |
| title_full_unstemmed | Joint optimization of beamforming and power allocation for DAJ‐based untrusted relay networks |
| title_short | Joint optimization of beamforming and power allocation for DAJ‐based untrusted relay networks |
| title_sort | joint optimization of beamforming and power allocation for daj based untrusted relay networks |
| topic | destination‐assisted jamming optimal power allocation physical layer security secrecy rate untrusted relay network |
| url | https://doi.org/10.4218/etrij.2018-0145 |
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