Improved and efficient EM channel estimation algorithm for MIMO-OFDM systems
For multiple-input multiple-output with orthogonal frequency division multiplexing（MIMO-OFDM） systems,the error floor（EF） phenomenon at high signal noise rate（SNR） was induced by the expectation maximum（EM） channel estimation algorithm.In addition,the data transmission efficiency was declined obviou...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Journal on Communications
2011-01-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/74418321/ |
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| _version_ | 1841537766576357376 |
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| author | XU Peng1 WANG Jin-kuan1 QI Feng2 |
| author_facet | XU Peng1 WANG Jin-kuan1 QI Feng2 |
| author_sort | XU Peng1 |
| collection | DOAJ |
| description | For multiple-input multiple-output with orthogonal frequency division multiplexing（MIMO-OFDM） systems,the error floor（EF） phenomenon at high signal noise rate（SNR） was induced by the expectation maximum（EM） channel estimation algorithm.In addition,the data transmission efficiency was declined obviously with the increasing number of transmit antennas.According to these problems,an improved and efficient EM channel estimation algorithm was pro-posed.Firstly,an accurate and equivalent signal model was introduced to derive a modified EM algorithm,which im-proved the estimation performance at high SNR.Next,to enhance the data transmission efficiency and further the esti-mate performance of the proposed algorithm,phase orthogonal pilots sequences and joint estimation were carried out over multiple OFDM symbols respectively.Simulation results show that the proposed algorithm has better estimation performance and higher data transmission efficiency. |
| format | Article |
| id | doaj-art-188933b0df5c4c5e9a8c31a941b93ecc |
| institution | Kabale University |
| issn | 1000-436X |
| language | zho |
| publishDate | 2011-01-01 |
| publisher | Editorial Department of Journal on Communications |
| record_format | Article |
| series | Tongxin xuebao |
| spelling | doaj-art-188933b0df5c4c5e9a8c31a941b93ecc2025-01-14T08:22:37ZzhoEditorial Department of Journal on CommunicationsTongxin xuebao1000-436X2011-01-0132879374418321Improved and efficient EM channel estimation algorithm for MIMO-OFDM systemsXU Peng1WANG Jin-kuan1QI Feng2For multiple-input multiple-output with orthogonal frequency division multiplexing（MIMO-OFDM） systems,the error floor（EF） phenomenon at high signal noise rate（SNR） was induced by the expectation maximum（EM） channel estimation algorithm.In addition,the data transmission efficiency was declined obviously with the increasing number of transmit antennas.According to these problems,an improved and efficient EM channel estimation algorithm was pro-posed.Firstly,an accurate and equivalent signal model was introduced to derive a modified EM algorithm,which im-proved the estimation performance at high SNR.Next,to enhance the data transmission efficiency and further the esti-mate performance of the proposed algorithm,phase orthogonal pilots sequences and joint estimation were carried out over multiple OFDM symbols respectively.Simulation results show that the proposed algorithm has better estimation performance and higher data transmission efficiency.http://www.joconline.com.cn/zh/article/74418321/MIMOOFDMchannel estimationEMerror floor |
| spellingShingle | XU Peng1 WANG Jin-kuan1 QI Feng2 Improved and efficient EM channel estimation algorithm for MIMO-OFDM systems Tongxin xuebao MIMO OFDM channel estimation EM error floor |
| title | Improved and efficient EM channel estimation algorithm for MIMO-OFDM systems |
| title_full | Improved and efficient EM channel estimation algorithm for MIMO-OFDM systems |
| title_fullStr | Improved and efficient EM channel estimation algorithm for MIMO-OFDM systems |
| title_full_unstemmed | Improved and efficient EM channel estimation algorithm for MIMO-OFDM systems |
| title_short | Improved and efficient EM channel estimation algorithm for MIMO-OFDM systems |
| title_sort | improved and efficient em channel estimation algorithm for mimo ofdm systems |
| topic | MIMO OFDM channel estimation EM error floor |
| url | http://www.joconline.com.cn/zh/article/74418321/ |
| work_keys_str_mv | AT xupeng1 improvedandefficientemchannelestimationalgorithmformimoofdmsystems AT wangjinkuan1 improvedandefficientemchannelestimationalgorithmformimoofdmsystems AT qifeng2 improvedandefficientemchannelestimationalgorithmformimoofdmsystems |