Least Square Channel Estimation Scheme of OFDM System using Fuzzy Inference Method

퍼지 추론법을 적용한 OFDM 시스템의 LS(Least Square) 채널추정 기법

  • 김남 (충북대학교 전기전자컴퓨터공학부) ;
  • 최정훈 (충북대학교 정보통신공학과)
  • Published : 2009.05.28


In this paper, the new channel estimation was proposed that have the low complexity and high performance using Fuzzy inference method uses recently from various field for estimation about uncertainty in channel estimation of OFDM. Proposed method is channel estimation performance improve, calculation and interpolation for statistics character of channel using the pilot before LS channel estimation by Fuzzy inference method. Simulation result in QPSK proposed channel estimation method shows the enhancement of 5.5dB compared to the LS channel estimation and the deterioration of 1.3dB compared to the MMSE channel estimation in mean square error point $10^{-3}$. symbol error rate shows similarity performance the MMSE $10^{-1.96}$, proposed channel estimation $10^{-1.93}$ and enhancement of $10^{-0.35}$ compared to the LS channel estimation in signal to noise ratio point 20dB.


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