| MIMO-OFDM系统中基于导频辅助的信道估计 |
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| 引用本文： | 周鹏,赵春明,盛彬.MIMO-OFDM系统中基于导频辅助的信道估计[J].电子与信息学报,2007,29(1):133-137. |
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| 作者姓名： | 周鹏 赵春明 盛彬 |
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| 作者单位： | 东南大学移动通信国家重点实验室,南京,210096;东南大学移动通信国家重点实验室,南京,210096;东南大学移动通信国家重点实验室,南京,210096 |
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| 摘 要： | 该文对MIMO-OFDM系统中基于导频辅助的LMMSE信道估计算法进行了研究，导出了其估计均方差的下界。为降低算法复杂度，首先利用奇异值分解给出一种低阶近似的信道估计器结构；其次提出了一种基于最优导频设计的简化算法。该简化算法不仅降低了算法复杂度，且能有效地获得最优估计性能。最后文中给出了估计信道特性的方法。
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| 关 键 词： | MIMO-OFDM 导频辅助的信道估计 LS LMMSE MSE下界 |
| 文章编号： | 1009-5896（2007）01-0133-05 |
| 收稿时间： | 2005-04-25 |
| 修稿时间： | 2005-09-30 |
Channel Estimation Based on Pilot-Assisted for MIMO-OFDM Systems |
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| Zhou Peng,Zhao Chun-ming,Sheng Bin.Channel Estimation Based on Pilot-Assisted for MIMO-OFDM Systems[J].Journal of Electronics & Information Technology,2007,29(1):133-137. |
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| Authors: | Zhou Peng Zhao Chun-ming Sheng Bin |
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| Affiliation: | National Mobile Communication Research Lab., Southeast University, Nanjing 210096, China |
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| Abstract: | The LMMSE channel estimation algorithms based on Pilot-Assisted is investigated for MIMO-OFDM systems,and the Low-Bound of MSE for LMMSE channel estimation is derived. A low rank channel estimator, at first, by using Singular Value Decomposition (SVD) is presented to reduce the complexity; Secondly, a simplified algorithm by using optimal pilot design is proposed. The simplified algorithm reduces not only the complexity evidently, but also attains the best estimation performance; Finally, The methods for estimating channel properties are developed. |
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| Keywords: | MIMO-OFDM Pilot-assisted channel estimation LS LMMSE Low-Bound of MSE |
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