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http://dx.doi.org/10.6109/jkiice.2013.17.12.2818

A Channel Estimation Method by Orthogonalizing of the time domain training signals in MIMO-OFDM systems  

Jeon, Hyoung-Goo (Department of Information Communication Engineering, Dong-Eui University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.17, no.12, 2013 , pp. 2818-2825 More about this Journal
Abstract
In this paper, a channel estimation method by orthogonalizing of the time domain training signal in MIMO-OFDM systems is proposed. It has shown that Jeon's method[8] cannot be directly used in 4 Tx antenna MIMO-OFDM systems since the delayed Rx signals interfere the orthogonal property of the time domain training signals. As a possible solution to the problem, in this paper, a guard interval is inserted into the center of the training signals so that the orthogonal property between the Rx training signals can be maintained. It is shown by using computer simulations that the proposed method can estimate the channel response in time domain in 4 Tx antenna MIMO-OFDM systems.
Keywords
MIMO; OFDM; Channel estimation; Orthogonal training signal; Time domain channel estimation;
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