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一种减小DTV接收机DFE误差传播的新算法

DOI: 10.11834/jig.2006011273

Keywords: 判决反馈均衡器,误差传播,软判决

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Abstract:

对于减少基于残留边带调制(VSB)的数字电视(DTV)接收机的符号间干扰(ISI),尽管判决反馈均衡器(DFE)是一种非常有效的方案,但这种方案由于受误差传播的影响而降低了接收质量。为减少误差传播,提出了一种使用软判决的DFE算法。该优化算法在判决器中使用了双曲正切函数,以改善DFE对抗误差传播的能力。此外,为了加快误差传播的仿真过程,还对反馈部分的抽头权值更新过程做了一个简单而有效的修改。计算机仿真结果表明,新算法对抗误差传播的性能远优于疑符算法,与理想DFE具有近似的表现。

References

[1]  Russel M,Bergmans J W M.A technique to reduce error propagation in M-ary decision feedback equalization[J].IEEE Transactions on Communication,1995,43(12):2878~2881.
[2]  Fertner A.Improvement of bit-error-rate in decision feedback equalizer by preventing decision error propagation[J].IEEE Transactions on Signal Processing,1998,46(7):1872 ~ 1877.
[3]  Lin C,Wu A.Soft-threshold-based multilayer decision feedback equalizer(STM-DFE) algorithm and VLSI architecture[J].IEEE Transactions on Signal Processing,2005,53 (8):1872 ~ 1877.
[4]  Balakrishnan J,Viswanatan H,Johnson Jr C R.Decision device optimization for soft decision feedback equalization[A].In:IEEE Conference on Information Sciences and System[C],Princeton University,New Jersey,USA,Mar.2000.
[5]  Chiani M.Introducing erasures in decision-feedback equalization to reduce error propagation[J].IEEE Transactions on Communication,1997,45(7):757 ~760.
[6]  Zhao F,Mathew G,Farhang-Boroujeny B.Techniques for minimizing error propagation in decision feedback detectors for recording channels[J].IEEE Transactions on Magnetic,2001,37 (1):592 ~ 602.
[7]  ATSC(Advanced Television Systems Committee).Digital television standard revision B,with amendment 1[S].Doc.A/53B ITU-T,August 2001.

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