Performance Optimization of Hybrid Satellite-Terrestrial Relay Network Based on CR-NOMA
The non-orthogonal multiple access (NOMA) scheme realizes the transmission of multiple user signals at the same time and frequency resource block through power domain multiplexing, which improves the system transmission rate and user fairness. In this paper, we propose a joint relay-and-antenna sele...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/18/5177 |
| _version_ | 1827706484407926784 |
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| author | Long Zhao Tao Liang Kang An |
| author_facet | Long Zhao Tao Liang Kang An |
| author_sort | Long Zhao |
| collection | DOAJ |
| description | The non-orthogonal multiple access (NOMA) scheme realizes the transmission of multiple user signals at the same time and frequency resource block through power domain multiplexing, which improves the system transmission rate and user fairness. In this paper, we propose a joint relay-and-antenna selection scheme based on the cognitive radio scenario. This scheme can achieve the maximum communication rate of the secondary user when the primary user maintains the optimal outage performance. In the considered system both terrestrial relays and users are deployed with multi-antenna configurations and the terrestrial relays adopt the decode-and-forward (DF) strategy to achieve communication between satellites and users. Then, we derive the exact outage probability expression of each user in the system and the asymptotic probability expression under high signal-to-noise ratio (SNR). Numeric results demonstrate that increasing the number of relays and antennas on the terrestrial nodes can both improve system outage performance. Moreover, the number of relays imposes a more obvious effect on the achievable system performance. |
| first_indexed | 2024-03-10T16:26:00Z |
| format | Article |
| id | doaj.art-f6e237b61c324f478b22db7f1167f8f5 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T16:26:00Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-f6e237b61c324f478b22db7f1167f8f52023-11-20T13:19:04ZengMDPI AGSensors1424-82202020-09-012018517710.3390/s20185177Performance Optimization of Hybrid Satellite-Terrestrial Relay Network Based on CR-NOMALong Zhao0Tao Liang1Kang An2College of Communications Engineering, Army Engineering University, Nanjing 210007, ChinaSixty-Third Research Institute, National University of Defense Technology, Nanjing 210007, ChinaSixty-Third Research Institute, National University of Defense Technology, Nanjing 210007, ChinaThe non-orthogonal multiple access (NOMA) scheme realizes the transmission of multiple user signals at the same time and frequency resource block through power domain multiplexing, which improves the system transmission rate and user fairness. In this paper, we propose a joint relay-and-antenna selection scheme based on the cognitive radio scenario. This scheme can achieve the maximum communication rate of the secondary user when the primary user maintains the optimal outage performance. In the considered system both terrestrial relays and users are deployed with multi-antenna configurations and the terrestrial relays adopt the decode-and-forward (DF) strategy to achieve communication between satellites and users. Then, we derive the exact outage probability expression of each user in the system and the asymptotic probability expression under high signal-to-noise ratio (SNR). Numeric results demonstrate that increasing the number of relays and antennas on the terrestrial nodes can both improve system outage performance. Moreover, the number of relays imposes a more obvious effect on the achievable system performance.https://www.mdpi.com/1424-8220/20/18/5177satellite communicationnon-orthogonal multiple accessdecode-and-forwardrelay selectionantenna selectionoutage probability |
| spellingShingle | Long Zhao Tao Liang Kang An Performance Optimization of Hybrid Satellite-Terrestrial Relay Network Based on CR-NOMA Sensors satellite communication non-orthogonal multiple access decode-and-forward relay selection antenna selection outage probability |
| title | Performance Optimization of Hybrid Satellite-Terrestrial Relay Network Based on CR-NOMA |
| title_full | Performance Optimization of Hybrid Satellite-Terrestrial Relay Network Based on CR-NOMA |
| title_fullStr | Performance Optimization of Hybrid Satellite-Terrestrial Relay Network Based on CR-NOMA |
| title_full_unstemmed | Performance Optimization of Hybrid Satellite-Terrestrial Relay Network Based on CR-NOMA |
| title_short | Performance Optimization of Hybrid Satellite-Terrestrial Relay Network Based on CR-NOMA |
| title_sort | performance optimization of hybrid satellite terrestrial relay network based on cr noma |
| topic | satellite communication non-orthogonal multiple access decode-and-forward relay selection antenna selection outage probability |
| url | https://www.mdpi.com/1424-8220/20/18/5177 |
| work_keys_str_mv | AT longzhao performanceoptimizationofhybridsatelliteterrestrialrelaynetworkbasedoncrnoma AT taoliang performanceoptimizationofhybridsatelliteterrestrialrelaynetworkbasedoncrnoma AT kangan performanceoptimizationofhybridsatelliteterrestrialrelaynetworkbasedoncrnoma |