Individual Channel Estimation in a Diamond Relay Network Using Relay-Assisted Training
We consider the training design and channel estimation in the amplify-and-forward (AF) diamond relay network. Our strategy is to transmit the source training in time-multiplexing (TM) mode while each relay node superimposes its own relay training over the amplified received data signal without bandw...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | International Journal of Digital Multimedia Broadcasting |
| Online Access: | http://dx.doi.org/10.1155/2017/1320689 |
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| _version_ | 1832562146770157568 |
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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 | We consider the training design and channel estimation in the amplify-and-forward (AF) diamond relay network. Our strategy is to transmit the source training in time-multiplexing (TM) mode while each relay node superimposes its own relay training over the amplified received data signal without bandwidth expansion. The principal challenge is to obtain accurate channel state information (CSI) of second-hop link due to the multiaccess interference (MAI) and cooperative data interference (CDI). To maintain the orthogonality between data and training, a modified relay-assisted training scheme is proposed to migrate the CDI, where some of the cooperative data at the relay are discarded to accommodate relay training. Meanwhile, a couple of optimal zero-correlation zone (ZCZ) relay-assisted sequences are designed to avoid MAI. At the destination node, the received signals from the two relay nodes are combined to achieve spatial diversity and enhanced data reliability. The simulation results are presented to validate the performance of the proposed schemes. |
| format | Article |
| id | doaj-art-0f0c20ab580d4164aa3a6abf85e512f4 |
| institution | Kabale University |
| issn | 1687-7578 1687-7586 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Digital Multimedia Broadcasting |
| spelling | doaj-art-0f0c20ab580d4164aa3a6abf85e512f42025-02-03T01:23:19ZengWileyInternational Journal of Digital Multimedia Broadcasting1687-75781687-75862017-01-01201710.1155/2017/13206891320689Individual Channel Estimation in a Diamond Relay Network Using Relay-Assisted TrainingXianwen He0Gaoqi Dou1Jun Gao2College of Electronic Engineering, Naval University of Engineering, Wuhan 430033, ChinaCollege of Electronic Engineering, Naval University of Engineering, Wuhan 430033, ChinaCollege of Electronic Engineering, Naval University of Engineering, Wuhan 430033, ChinaWe consider the training design and channel estimation in the amplify-and-forward (AF) diamond relay network. Our strategy is to transmit the source training in time-multiplexing (TM) mode while each relay node superimposes its own relay training over the amplified received data signal without bandwidth expansion. The principal challenge is to obtain accurate channel state information (CSI) of second-hop link due to the multiaccess interference (MAI) and cooperative data interference (CDI). To maintain the orthogonality between data and training, a modified relay-assisted training scheme is proposed to migrate the CDI, where some of the cooperative data at the relay are discarded to accommodate relay training. Meanwhile, a couple of optimal zero-correlation zone (ZCZ) relay-assisted sequences are designed to avoid MAI. At the destination node, the received signals from the two relay nodes are combined to achieve spatial diversity and enhanced data reliability. The simulation results are presented to validate the performance of the proposed schemes.http://dx.doi.org/10.1155/2017/1320689 |
| spellingShingle | Xianwen He Gaoqi Dou Jun Gao Individual Channel Estimation in a Diamond Relay Network Using Relay-Assisted Training International Journal of Digital Multimedia Broadcasting |
| title | Individual Channel Estimation in a Diamond Relay Network Using Relay-Assisted Training |
| title_full | Individual Channel Estimation in a Diamond Relay Network Using Relay-Assisted Training |
| title_fullStr | Individual Channel Estimation in a Diamond Relay Network Using Relay-Assisted Training |
| title_full_unstemmed | Individual Channel Estimation in a Diamond Relay Network Using Relay-Assisted Training |
| title_short | Individual Channel Estimation in a Diamond Relay Network Using Relay-Assisted Training |
| title_sort | individual channel estimation in a diamond relay network using relay assisted training |
| url | http://dx.doi.org/10.1155/2017/1320689 |
| work_keys_str_mv | AT xianwenhe individualchannelestimationinadiamondrelaynetworkusingrelayassistedtraining AT gaoqidou individualchannelestimationinadiamondrelaynetworkusingrelayassistedtraining AT jungao individualchannelestimationinadiamondrelaynetworkusingrelayassistedtraining |