Joint Transceiver Optimization for Multiuser Multi-Antenna Relay Systems With Energy Harvesting
In this paper, a multiuser multi-antenna relay system with wireless power transfer is investigated, where the relay node harvests energy from the radio frequency signal sent from the source node and utilizes the harvested energy to forward the information signal to users. Under the transmit power co...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2019-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8867890/ |
| _version_ | 1818911302888718336 |
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| author | Jinlong Wang Gang Wang Hongjuan Yang Bo Li Tong Zhang |
| author_facet | Jinlong Wang Gang Wang Hongjuan Yang Bo Li Tong Zhang |
| author_sort | Jinlong Wang |
| collection | DOAJ |
| description | In this paper, a multiuser multi-antenna relay system with wireless power transfer is investigated, where the relay node harvests energy from the radio frequency signal sent from the source node and utilizes the harvested energy to forward the information signal to users. Under the transmit power constraints at all nodes, the optimization problem is formulated which maximizes the achievable sum rate of the relay system by optimizing the time switching (TS) factor and the source and the relay precoding matrixes. We divide the complex non-convex objective problem into several subproblems which are solved by the proposed alternating optimization (AO) scheme. We also propose a novel power allocation scheme across subchannels to maximize the sum rate. Since the objective function to optimize the relay power allocation is not convex, difference of convex programming is adopted to transform the original non-convex problems into convex optimization problems. Simulation results are provided to verify the analysis and demonstrate the efficiency of the proposed AO scheme. |
| first_indexed | 2024-12-19T22:56:33Z |
| format | Article |
| id | doaj.art-13cc2715b9cb4d5ab63655186085f279 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-19T22:56:33Z |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-13cc2715b9cb4d5ab63655186085f2792022-12-21T20:02:37ZengIEEEIEEE Access2169-35362019-01-01715115615116710.1109/ACCESS.2019.29471718867890Joint Transceiver Optimization for Multiuser Multi-Antenna Relay Systems With Energy HarvestingJinlong Wang0Gang Wang1Hongjuan Yang2https://orcid.org/0000-0001-5231-7331Bo Li3https://orcid.org/0000-0003-3950-2019Tong Zhang4Communication Research Center, Harbin Institute of Technology, Harbin, ChinaCommunication Research Center, Harbin Institute of Technology, Harbin, ChinaCommunication Research Center, Harbin Institute of Technology, Harbin, ChinaCommunication Research Center, Harbin Institute of Technology, Harbin, ChinaCommunication Research Center, Harbin Institute of Technology, Harbin, ChinaIn this paper, a multiuser multi-antenna relay system with wireless power transfer is investigated, where the relay node harvests energy from the radio frequency signal sent from the source node and utilizes the harvested energy to forward the information signal to users. Under the transmit power constraints at all nodes, the optimization problem is formulated which maximizes the achievable sum rate of the relay system by optimizing the time switching (TS) factor and the source and the relay precoding matrixes. We divide the complex non-convex objective problem into several subproblems which are solved by the proposed alternating optimization (AO) scheme. We also propose a novel power allocation scheme across subchannels to maximize the sum rate. Since the objective function to optimize the relay power allocation is not convex, difference of convex programming is adopted to transform the original non-convex problems into convex optimization problems. Simulation results are provided to verify the analysis and demonstrate the efficiency of the proposed AO scheme.https://ieeexplore.ieee.org/document/8867890/Multiuserenergy harvestingMIMO relaytime switching (TS)alternating optimization |
| spellingShingle | Jinlong Wang Gang Wang Hongjuan Yang Bo Li Tong Zhang Joint Transceiver Optimization for Multiuser Multi-Antenna Relay Systems With Energy Harvesting IEEE Access Multiuser energy harvesting MIMO relay time switching (TS) alternating optimization |
| title | Joint Transceiver Optimization for Multiuser Multi-Antenna Relay Systems With Energy Harvesting |
| title_full | Joint Transceiver Optimization for Multiuser Multi-Antenna Relay Systems With Energy Harvesting |
| title_fullStr | Joint Transceiver Optimization for Multiuser Multi-Antenna Relay Systems With Energy Harvesting |
| title_full_unstemmed | Joint Transceiver Optimization for Multiuser Multi-Antenna Relay Systems With Energy Harvesting |
| title_short | Joint Transceiver Optimization for Multiuser Multi-Antenna Relay Systems With Energy Harvesting |
| title_sort | joint transceiver optimization for multiuser multi antenna relay systems with energy harvesting |
| topic | Multiuser energy harvesting MIMO relay time switching (TS) alternating optimization |
| url | https://ieeexplore.ieee.org/document/8867890/ |
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