Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Channel Estimation and Detection Techniques for OFDM Systems in Time Varying Channels

OFDM 시스템에서의 시변 채널 추정 및 신호 검출

  • 김형중 (연세대학교 전기전자공학과 정보통신연구실) ;
  • 박정호 (연세대학교 전기전자공학과 정보통신연구실) ;
  • 박병준 (연세대학교 전기전자공학과 정보통신연구실) ;
  • 김지형 (연세대학교 전기전자공학과 정보통신연구실) ;
  • 강창언 (연세대학교 전기전자공학과 정보통신연구실) ;
  • 홍대식 (연세대학교 전기전자공학과 정보통신연구실)
  • Published : 2003.07.01
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Abstract

In this thesis, a new channel estimation technique is proposed for orthogonal frequency division multiplexing (OFDM) over time varying channels. The channel estimation algorithm exploits the fact that the estimated channel impulse response (CIR) by using pilot signal is the average value of the CIR variation within an OFDM symbol period. With this fact, the CIR variation is simply estimated through lowpass interpolation of the CIRs of the adjacent OFDM symbols. For signal detection, a time domain equalizer is used in this thesis. Simulation results show that the proposed system improves the bit error rate (BER) over time varying channels.

Keywords