Improved H-infinity channel estimator based on EM for MIMO-OFDM systems
文献类型：期刊论文
| 作者 | Xu Peng2; Wang Jinkuan2; Qi Feng1 |
| 刊名 | JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS
 |
| 出版日期 | 2011 |
| 卷号 | 22期号:4页码:572-578 |
| 关键词 | LINEAR-ESTIMATION WIRELESS SYSTEMS KREIN SPACES DESIGN multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) channel estimation H-infinity expectation maximization (EM) angle domain |
| ISSN号 | 1004-4132 |
| 其他题名 | Improved H-infinity channel estimator based on EM for MIMO-OFDM systems |
| 英文摘要 | H-infinity estimator is generally implemented in time-variant state-space models, but it leads to high complexity when the model is used for multiple input multiple output with orthogonal frequency division multiplexing (MIMO-OFDM) systems. Thus, an H-infinity estimator over time-invariant system models is proposed, which modifies the Krein space accordingly. In order to avoid the large matrix inversion and multiplication required in each OFDM symbol from different transmit antennas, expectation maximization (EM) is developed to reduce the high computational load. Joint estimation over multiple OFDM symbols is used to resist the high pilot overhead generated by the increasing number of transmit antennas. Finally, the performance of the proposed estimator is enhanced via an angle-domain process. Through performance analysis and simulation experiments, it is indicated that the proposed algorithm has a better mean square error (MSE) and bit error rate (BER) performance than the optimal least square (LS) estimator. Joint estimation over multiple OFDM symbols can not only reduce the pilot overhead but also promote the channel performance. What is more, an obvious improvement can be obtained by using the angle-domain filter. |
| 资助项目 | [National Natural Science Foundation of China] ; [Bureau of Education of Hebei Province] ; [Funds of Central Colleges Basic Scientific Operating Expense] |
| 语种 | 英语 |
| CSCD记录号 | CSCD:4308893 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/142730]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.Katholieke University Leuven, Elect Engn Dept ESAT Telecommun Microwaves TELEMI, B-3001 Heverlee, Belgium 2.中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Xu Peng,Wang Jinkuan,Qi Feng. Improved H-infinity channel estimator based on EM for MIMO-OFDM systems[J]. JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS,2011,22(4):572-578. |
| APA | Xu Peng,Wang Jinkuan,&Qi Feng.(2011).Improved H-infinity channel estimator based on EM for MIMO-OFDM systems.JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS,22(4),572-578. |
| MLA | Xu Peng,et al."Improved H-infinity channel estimator based on EM for MIMO-OFDM systems".JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS 22.4(2011):572-578. |
入库方式： OAI收割
来源：金属研究所
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