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Non-redundant Precoding Based Blind Channel Estimation Scheme for OFDM Systems
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 Title & Authors
Non-redundant Precoding Based Blind Channel Estimation Scheme for OFDM Systems
Seo, Bang-Won;
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For orthogonal frequency-division multiplexing (OFDM) systems, we propose a blind channel estimation scheme based on non-redundant precoding. In the proposed scheme, a modified covariance matrix is first obtained by dividing the covariance matrix of the received signal vector by the precoding matrix element-by-element. Then, the channel vector is estimated as an eigenvector corresponding to the largest eigenvalue of the modified covariance matrix. The eigenvector can be obtained by power method with low computational complexity instead of the complicated eigenvalue decomposition. We analytically derive a mean square error (MSE) of the proposed channel estimation scheme and show that the analysis result coincides well with the simulation result. Also, simulation results show that the proposed scheme has better MSE and bit error rate (BER) performance than conventional channel estimation schemes.
OFDM;channel estimation;precoding;
 Cited by
다중 셀 MIMO 하향채널에서의 UCD를 이용한 블록 대각 분해,박유한;박대영;

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