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Performance Analysis of Block Turbo Coded OFDM System Using Channel State Information

채널상태정보를 이용하는 블록터보 부호화된 OFDM 시스템의 성능 분석

  • Kim, Han-Jong (School of Information Technology, Korea University of Technology and Education)
  • 김한종 (한국기술교육대학교 정보기술공학부)
  • Received : 2010.01.27
  • Accepted : 2010.12.23
  • Published : 2011.02.28

Abstract

In this paper, the new decoding algorithm of Block Turbo Codes using Channel State Information(CSI), which is estimated to compensate for the distorted signal caused by multi-path fading, is proposed in order to improve error correction capacity during decoding procedure in OFDM system. The performance of the new decoding algorithm is compared to that of the conventional decoding algorithm without using channel state information under the Rayleigh fading channel. Experimental results showed that in case of only one iteration coding gains of up to 5.0dB~9.0dB can be obtained by applying the channel state information to the conventional decoding algorithm according to the modulation methods. In addition to that, the new decoding algorithm using channel state information at only one iteration shows a performance improvement of 3.5dB to 5.0dB when compared to the conventional decoding algorithm after four iterations. This leads to reduce the considerable amount of computation.

Keywords

OFDM;Channel state information;Block turbo code

References

  1. S. Kalyani, V. Raj and K. Giridhar, "Narrowband Interference Mitigation in Turbo-Coded OFDM Systems," IEEE ICC'07 Conference, pp. 1059-1064, 2007
  2. S. Kalyani, V. Raj and K. Giridhar, "Narrowband Interference Mitigation in Turbo-Coded OFDM Systems," IEEE ICC'07 Conference, pp. 1059-1064, 2007
  3. A. Al-Dweik, A. Goff and B. Sharif, "A Hybris Decoder for Block Turbo Codes," IEEE Trans. Comm., Vol 57, No. 5, pp. 1229-1232, May. 2009 https://doi.org/10.1109/TCOMM.2009.05.070107
  4. R. Pyndish, A. Glavieux, A. Picart and S. Jacq, "Near optimum decoding of product codes," in Proc. IEEE Globecom Conference (San Francisco, CA, Nov.1994), pp.339-343 https://doi.org/10.1109/GLOCOM.1994.513494
  5. R. Pyndish, A.Glavieux, A. Picart and S.Jacq, "Near optimum decoding of product codes," in proc. of IEEE GLOBECOM '94 Conference, vol. 1/3, Nov.-Dec. 1994 https://doi.org/10.1109/GLOCOM.1994.513494
  6. D. Chase, "A class of algorithms for decoding block codes with channel measurement information," IEEE Trans. Inform. Theory, vol. IT-18, pp.170-182, Jan. 1972 https://doi.org/10.1109/TIT.1972.1054746
  7. 이정익, "유비쿼터스 개념을 도입한 스마트웨어," 한국 산학기술학회 논문집. vol. 10, No. 5, pp923-928, 2009. 5 https://doi.org/10.5762/KAIS.2009.10.5.923