Optimal Training Design and Placement for MIMO Orthogonal Frequency Division Multiplexing Channel Estimation

This paper deals with optimal training design and placement over multiple orthogonal frequency division multiplexing （OFDM） symbols for the least squares （LS） channel estimation in multiple-input multipleoutput （MIMO） OFDM systems. First, the optimal pilot sequences over multiple OFDM symbols are de...

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Bibliographic Details
Published in:Shanghai jiao tong da xue xue bao 2010-02, Vol.15 (1), p.58-63
Main Author: 林成裕 钱良 张文军 徐友云 李洪烈
Format: Article
Language:English
Subjects:
Architecture
Computer Science
Electrical Engineering
Engineering
Life Sciences
Materials Science
MIMO
OFDM系统
优化设计
信道估计
多输入输出系统
正交频分复用
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Summary:This paper deals with optimal training design and placement over multiple orthogonal frequency division multiplexing （OFDM） symbols for the least squares （LS） channel estimation in multiple-input multipleoutput （MIMO） OFDM systems. First, the optimal pilot sequences over multiple OFDM symbols are derived by co-cyclic Jacket matrices based on the minimum mean square error （MSE） of the LS channel estimation. Then, an enhanced channel estimation method using sliding window is proposed to improve further the performance for the optimal pilot sequences in fast-varying channels. Simulation results show that the enhanced method can efficiently improve the performances for the optimal pilot sequences over two and four OFDM symbols, especially in fast-varying channels.
ISSN:1007-1172
1995-8188
DOI:10.1007/s12204-010-8102-1