DFT-based decision directed channel estimation algorithm for OFDM systems

Authors:
Jun-Hee Jang;Se-Bin Im;Hyung-Jin Choi;Hee-Jin Roh
Affiliations:
Sungkyunkwan University, Korea;Sungkyunkwan University, Korea;Sungkyunkwan University, Korea;SAMSUNG Electronics, CO., LTD, Korea
Venue:
Proceedings of the 2nd international conference on Ubiquitous information management and communication
Year:
2008

Citing 4
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Abstract

An enhanced discrete Fourier transform (DFT)-based channel estimation for OFDM system is proposed. Conventional DFT-based channel estimations improve the performance by suppressing time domain noise. However, the disadvantage is that the effect of noise reduction is dependent upon the number of pilot signals. In order to overcome the disadvantage, the proposed algorithm improves performance by using the decision directed method for data subcarriers, and it is confirmed by computer simulation. Simulation results demonstrate that the proposed algorithm outperforms the conventional DFT-based estimation in terms of BER and MSE performance.