Performance Improvement of LMMSE Channel Estimation Method for OFDM Systems 


Vol. 30,  No. 2, pp. 43-50, Feb.  2005


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  Abstract

In this paper, we present an improved channel estimation method for orthogonal frequency division multipexing systems using pilot symbol assisted modulation(PSAM). Conventional linear minimum mean square error(LMMSE) channel estimation method uses only pilot symbols for channel estimation. So, as the fading channel varies rapidly, the system performance is degraded. The basic idea of the proposed scheme is that we firstly estimate channel coefficients at the middle point between two pilot symbols and then compute the channel attenuation by using LMMSE method. Superior performance achieved with the proposed method is illustrated by simulation experiments with the Doppler frequency of 36Hz and 185Hz in comparison with conventional LMMSE channel estimator.

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  Cite this article

[IEEE Style]

Y. Kang, Y. Kim, D. Suh, J. Kim, "Performance Improvement of LMMSE Channel Estimation Method for OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 2, pp. 43-50, 2005. DOI: .

[ACM Style]

Yeon-Seok Kang, Young-Soo Kim, Doug-Young Suh, and Jin-Sang Kim. 2005. Performance Improvement of LMMSE Channel Estimation Method for OFDM Systems. The Journal of Korean Institute of Communications and Information Sciences, 30, 2, (2005), 43-50. DOI: .

[KICS Style]

Yeon-Seok Kang, Young-Soo Kim, Doug-Young Suh, Jin-Sang Kim, "Performance Improvement of LMMSE Channel Estimation Method for OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 30, no. 2, pp. 43-50, 2. 2005.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880