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Volume 25 Issue 11
Nov.  2003
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Ma Zhangyong, Liu Yaran, Zhao Chunming, You Xiaohu . The joint inerative channel estimation and decoder algorithm for the ofdm system[J]. Journal of Electronics & Information Technology, 2003, 25(11): 1441-1446.
Citation: Ma Zhangyong, Liu Yaran, Zhao Chunming, You Xiaohu . The joint inerative channel estimation and decoder algorithm for the ofdm system[J]. Journal of Electronics & Information Technology, 2003, 25(11): 1441-1446.

The joint inerative channel estimation and decoder algorithm for the ofdm system

  • Received Date: 2002-07-01
  • Rev Recd Date: 2002-10-11
  • Publish Date: 2003-11-19
  • For the QPSK-modulated OFDM system, the channel estimation accuracy can be improved using of the soft information which is based on the iterative decoder principle of Turbo. Meanwhile, in order to avoid serious error propagation due to the error decision of the decoder, the weighted iterative estimation algorithm is proposed. The simulation results show that the proposed algorithm improves the system performance dramatically compared with the conventional scheme.
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  • M.C. Valenti, B. D. Woerner, Iterative channel estimation and decoding of pilot symbol assisted Turbo codes over flat-fading channels, IEEE J. on SAC, 2001, 19(9), 1697-1705.[2]J.K. Moon, S. I. Choi, Performance of channel estimation methods for OFDM systems in a multiple fading channels, IEEE Trans. on Consumer Electronics, 2000, 46(1), 161-170.[3]F. Said, A. H. Aghvami, Two dimensional pilot assisted channel estimation for turbo coded OFDM systems, Turbo Codes in Digital Broadcasting, IEE Colloquium on, London, 1999, 19/1-19/6.[4]E. Jaffrot, M. Siala, Turbo channel estimation for OFDM systems on highly time and frequency selective channels, Proc. IEEE ICASSP00. Istanbul, Turkey, 2000, Vol.5, 2977-2980.[5]Hsuan-Jung Su and E. Geraniotis, Low-complexity joint channel estimation and decoding for pilot symbol-assisted modulation and multiple differential detection systems with correlated Rayleigh fading, IEEE Trans. on Commun., 2002, 50(2), 249-261.[6]Ye Li, Pilot-symbol-aided channel estimation for OFDM in wireless systems, IEEE Trans. on Vehicular Technology, 2000, 49(7), 1207-1215.[7]H. Rohling, T. May, OFDM systems with differential modulation schemes and turbo decoding techniques, Proc. Broadband Communications, Zurich, 2000, 251-255.[8]H. Hisata, J. Horikoshi, Turbo codes with RLS-MLSE channel estimation in the co-channel interference environment, PIMRC, London, 2000, Vol. 2,903-907.[9]Q. Li, C. N. Georghiades, X. Wang, An iterative decoding scheme for pilot-assisted modulation in fading channels, GLOBECOM00. IEEE, San Francisco, 2000, Vol. 2,807-811.
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