MIMO-OFDM系统中基于导频辅助的信道估计

周鹏; 赵春明; 盛彬

doi:10.3724/SP.J.1146.2005.00470

MIMO-OFDM系统中基于导频辅助的信道估计

doi: 10.3724/SP.J.1146.2005.00470

基金项目:

国家自然科学基金(60496311)资助课题

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出版历程
- 收稿日期: 2005-04-25
- 修回日期: 2005-09-30
- 刊出日期: 2007-01-19

Channel Estimation Based on Pilot-Assisted for MIMO-OFDM Systems

摘要

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。
- MIMO-OFDM;导频辅助的信道估计;LS;LMMSE;MSE下界
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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参考文献(1)

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