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Channel Estimation Scheme Using Modified ICA in MIMO-OFDM Systems  

Kim Jong-Deuk (시립인천대학교 전자공학과 신호처리 연구실)
Byun Youn-Shik (시립인천대학교 전자공학과 신호처리 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.5A, 2006 , pp. 475-483 More about this Journal
Abstract
If channel coefficients errors exist in MIMO-OFDM systems, the performance degradation of systems will occurs. In order to improve the performance of MIMO-OFDM systems, the technique of obtaining accurate channel estimation in multipath fading channel is necessary. In this paper, we introduce and propose new channel estimation-modified ICA algorithm. Simulation results shows from BER and SER curves which compare the proposed algorithm under time-varying Rayleigh fading with perfect known channel. The result of channel estimation by the proposed algorithm in this simulation, it shows that PDF(amplitude of channel) are close to the case with perfect known channel at the receiver with respect to uncoded QPSK/16-QAM/64-QAM modulation. Also, we can see that BER and SER curves are very close to the case with perfect known channel. Therefore, we see that the proposed algorithm have a good performance in MIMO-OFDM systems.
Keywords
MIMO-OFDM; Channel Estimation; Modified ICA; Rotating Phasor;
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