Outage Analysis of Transmit Beamforming and Relay Selection with Outdated Channel Estimates over Nakagami- Fading Channels
We investigate the joint effects of feedback delay and channel estimation errors (CEE) over Nakagami- m fading channels for two-hop amplify-and-forward (AF) relaying systems with transmit beamforming (TB) and relay selection (RS). We derive new closed-form expressions for the system outage performan...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2015-07-01
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| Series: | International Journal of Distributed Sensor Networks |
| Online Access: | https://doi.org/10.1155/2015/389287 |
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| _version_ | 1849686193251287040 |
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| author | Lei Wang Yueming Cai Liang Zhang Weiwei Yang |
| author_facet | Lei Wang Yueming Cai Liang Zhang Weiwei Yang |
| author_sort | Lei Wang |
| collection | DOAJ |
| description | We investigate the joint effects of feedback delay and channel estimation errors (CEE) over Nakagami- m fading channels for two-hop amplify-and-forward (AF) relaying systems with transmit beamforming (TB) and relay selection (RS). We derive new closed-form expressions for the system outage performance including the exact analysis and informative high SNR asymptotic approximations, which indicate that TB feedback delay reduces the achievable diversity order to one, regardless of Nakagami- m fading parameters. Whereas RS delay reduces the diversity order to a case without relay selection and CEE merely result in coding gain loss, numerical results verify the theoretical analysis and illustrate that the outage performance is more sensitive to the TB feedback delay. |
| format | Article |
| id | doaj-art-b6e77604808445e1917eb72f8a22dc35 |
| institution | DOAJ |
| issn | 1550-1477 |
| language | English |
| publishDate | 2015-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Distributed Sensor Networks |
| spelling | doaj-art-b6e77604808445e1917eb72f8a22dc352025-08-20T03:22:48ZengWileyInternational Journal of Distributed Sensor Networks1550-14772015-07-011110.1155/2015/389287389287Outage Analysis of Transmit Beamforming and Relay Selection with Outdated Channel Estimates over Nakagami- Fading ChannelsLei Wang0Yueming Cai1Liang Zhang2Weiwei Yang3 College of Communications Engineering, PLA University of Science and Technology, Nanjing 210007, China College of Communications Engineering, PLA University of Science and Technology, Nanjing 210007, China New Star Research Institute of Applied Technology, Hefei 230031, China College of Communications Engineering, PLA University of Science and Technology, Nanjing 210007, ChinaWe investigate the joint effects of feedback delay and channel estimation errors (CEE) over Nakagami- m fading channels for two-hop amplify-and-forward (AF) relaying systems with transmit beamforming (TB) and relay selection (RS). We derive new closed-form expressions for the system outage performance including the exact analysis and informative high SNR asymptotic approximations, which indicate that TB feedback delay reduces the achievable diversity order to one, regardless of Nakagami- m fading parameters. Whereas RS delay reduces the diversity order to a case without relay selection and CEE merely result in coding gain loss, numerical results verify the theoretical analysis and illustrate that the outage performance is more sensitive to the TB feedback delay.https://doi.org/10.1155/2015/389287 |
| spellingShingle | Lei Wang Yueming Cai Liang Zhang Weiwei Yang Outage Analysis of Transmit Beamforming and Relay Selection with Outdated Channel Estimates over Nakagami- Fading Channels International Journal of Distributed Sensor Networks |
| title | Outage Analysis of Transmit Beamforming and Relay Selection with Outdated Channel Estimates over Nakagami- Fading Channels |
| title_full | Outage Analysis of Transmit Beamforming and Relay Selection with Outdated Channel Estimates over Nakagami- Fading Channels |
| title_fullStr | Outage Analysis of Transmit Beamforming and Relay Selection with Outdated Channel Estimates over Nakagami- Fading Channels |
| title_full_unstemmed | Outage Analysis of Transmit Beamforming and Relay Selection with Outdated Channel Estimates over Nakagami- Fading Channels |
| title_short | Outage Analysis of Transmit Beamforming and Relay Selection with Outdated Channel Estimates over Nakagami- Fading Channels |
| title_sort | outage analysis of transmit beamforming and relay selection with outdated channel estimates over nakagami fading channels |
| url | https://doi.org/10.1155/2015/389287 |
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