Non-redundant Precoding Based Blind Channel Estimation Scheme for OFDM Systems 


Vol. 37,  No. 6, pp. 450-457, Jun.  2012


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  Abstract

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.

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  Cite this article

[IEEE Style]

B. Seo, "Non-redundant Precoding Based Blind Channel Estimation Scheme for OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 37, no. 6, pp. 450-457, 2012. DOI: .

[ACM Style]

Bangwon Seo. 2012. Non-redundant Precoding Based Blind Channel Estimation Scheme for OFDM Systems. The Journal of Korean Institute of Communications and Information Sciences, 37, 6, (2012), 450-457. DOI: .

[KICS Style]

Bangwon Seo, "Non-redundant Precoding Based Blind Channel Estimation Scheme for OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 37, no. 6, pp. 450-457, 6. 2012.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880