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OFDM系統(tǒng)中迭代信道估計(jì)和解碼研究

馬章勇 劉雅然 趙春明 尤肖虎

馬章勇, 劉雅然, 趙春明, 尤肖虎. OFDM系統(tǒng)中迭代信道估計(jì)和解碼研究[J]. 電子與信息學(xué)報(bào), 2003, 25(11): 1441-1446.
引用本文: 馬章勇, 劉雅然, 趙春明, 尤肖虎. OFDM系統(tǒng)中迭代信道估計(jì)和解碼研究[J]. 電子與信息學(xué)報(bào), 2003, 25(11): 1441-1446.
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.

OFDM系統(tǒng)中迭代信道估計(jì)和解碼研究

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

  • 摘要: 該文針對(duì) QPSK調(diào)制的 OFDM系統(tǒng),根據(jù) Turbo碼的迭代解碼原理,利用其軟信息對(duì)信道估計(jì)的精度進(jìn)行改進(jìn)。同時(shí)為了防止由于解碼器判決不準(zhǔn)確造成誤差的傳播,提出了一種加權(quán)迭代估計(jì)算法,仿真結(jié)果表明,該方法與傳統(tǒng)方法相比,能較顯著地提高系統(tǒng)的性能。
  • 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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出版歷程
  • 收稿日期:  2002-07-01
  • 修回日期:  2002-10-11
  • 刊出日期:  2003-11-19

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