SEMI-BLIND CHANNEL ESTIMATION FOR OFDM SYSTEMS VIA AN EM-BLOCK ALGORITHM (FriAmOR5)
Author(s) :
Touati Sami (LSS, France)
Mamfoumbi Ocloo Jean-Marcel (LSS, France)
Alberge Florence (LSS, France)
Duhamel Pierre (LSS, France)
Abstract : In this paper, we propose a semi-blind channel estimation method based on an Expectation-Maximization Block algorithm (EM-Block). In the OFDM communication context, such an algorithm still have a linear arithmetical complexity. Morever, it yields to an SNR improvement going up to 3 dB compared to classical training sequences based channel estimation method in the context of 5 GHz OFDM WLANs. The new algorithm performs better than already existing recursive algorithms and use much less prior information on the channel coefficients.

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