Channel Estimation for OFDM-Based Amplify-and-Forward Cooperative System Using Relay-Superimposed Pilots
For the OFDM-based Amplify-and-Forward cooperative system, a novel relay-superimposed pilot strategy is proposed, where the source pilot symbols are frequency division multiplexed to estimate the cascaded channel while relay pilot sequence is superimposed onto the top of the cooperative data stream...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
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| Series: | International Journal of Digital Multimedia Broadcasting |
| Online Access: | http://dx.doi.org/10.1155/2018/9618147 |
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| _version_ | 1832553389210206208 |
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| author | Xianwen He Gaoqi Dou Jun Gao |
| author_facet | Xianwen He Gaoqi Dou Jun Gao |
| author_sort | Xianwen He |
| collection | DOAJ |
| description | For the OFDM-based Amplify-and-Forward cooperative system, a novel relay-superimposed pilot strategy is proposed, where the source pilot symbols are frequency division multiplexed to estimate the cascaded channel while relay pilot sequence is superimposed onto the top of the cooperative data stream for second-hop channel estimation. This method avoids the loss of data rate for additional pilot subcarriers but results in the interference of unknown cooperative data. To remove the interference of cooperative data during the estimation of second-hop channel, the Cooperative Interference Cancelation scheme assisted by cooperative data from direct link is proposed. We derive the approximated lower bound for the MSE of second-hop channel estimation. Simulation results are presented to validate the performance of the proposed schemes. |
| format | Article |
| id | doaj-art-3e013bee623d41ceb95f4f17641a1cd6 |
| institution | Kabale University |
| issn | 1687-7578 1687-7586 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Digital Multimedia Broadcasting |
| spelling | doaj-art-3e013bee623d41ceb95f4f17641a1cd62025-02-03T05:54:01ZengWileyInternational Journal of Digital Multimedia Broadcasting1687-75781687-75862018-01-01201810.1155/2018/96181479618147Channel Estimation for OFDM-Based Amplify-and-Forward Cooperative System Using Relay-Superimposed PilotsXianwen He0Gaoqi Dou1Jun Gao2Department of Communication Engineering, Naval University of Engineering, Wuhan 430033, ChinaDepartment of Communication Engineering, Naval University of Engineering, Wuhan 430033, ChinaDepartment of Communication Engineering, Naval University of Engineering, Wuhan 430033, ChinaFor the OFDM-based Amplify-and-Forward cooperative system, a novel relay-superimposed pilot strategy is proposed, where the source pilot symbols are frequency division multiplexed to estimate the cascaded channel while relay pilot sequence is superimposed onto the top of the cooperative data stream for second-hop channel estimation. This method avoids the loss of data rate for additional pilot subcarriers but results in the interference of unknown cooperative data. To remove the interference of cooperative data during the estimation of second-hop channel, the Cooperative Interference Cancelation scheme assisted by cooperative data from direct link is proposed. We derive the approximated lower bound for the MSE of second-hop channel estimation. Simulation results are presented to validate the performance of the proposed schemes.http://dx.doi.org/10.1155/2018/9618147 |
| spellingShingle | Xianwen He Gaoqi Dou Jun Gao Channel Estimation for OFDM-Based Amplify-and-Forward Cooperative System Using Relay-Superimposed Pilots International Journal of Digital Multimedia Broadcasting |
| title | Channel Estimation for OFDM-Based Amplify-and-Forward Cooperative System Using Relay-Superimposed Pilots |
| title_full | Channel Estimation for OFDM-Based Amplify-and-Forward Cooperative System Using Relay-Superimposed Pilots |
| title_fullStr | Channel Estimation for OFDM-Based Amplify-and-Forward Cooperative System Using Relay-Superimposed Pilots |
| title_full_unstemmed | Channel Estimation for OFDM-Based Amplify-and-Forward Cooperative System Using Relay-Superimposed Pilots |
| title_short | Channel Estimation for OFDM-Based Amplify-and-Forward Cooperative System Using Relay-Superimposed Pilots |
| title_sort | channel estimation for ofdm based amplify and forward cooperative system using relay superimposed pilots |
| url | http://dx.doi.org/10.1155/2018/9618147 |
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