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Volume 31 Issue 9
Dec.  2010
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Dou Gao-qi, Gao Jun, Tao Wei, Liu Bing. Sequence-based Block Decision-Aided Equalizer for Turbo Equalization[J]. Journal of Electronics & Information Technology, 2009, 31(9): 2152-2156. doi: 10.3724/SP.J.1146.2008.00916
Citation: Dou Gao-qi, Gao Jun, Tao Wei, Liu Bing. Sequence-based Block Decision-Aided Equalizer for Turbo Equalization[J]. Journal of Electronics & Information Technology, 2009, 31(9): 2152-2156. doi: 10.3724/SP.J.1146.2008.00916

Sequence-based Block Decision-Aided Equalizer for Turbo Equalization

doi: 10.3724/SP.J.1146.2008.00916
  • Received Date: 2008-07-18
  • Rev Recd Date: 2009-06-08
  • Publish Date: 2009-09-19
  • A sequenced-based Block Decision-Aided Equalizer (BDAE) for turbo equalization is proposed, which can overcome the deficiency of symbol-by-symbol detection equalizers that the A Posteriori Probability (APP) of each symbol is calculated individually based on a Gaussian distribution assumption of the equalizer output. The proposed equalizer used the full decoders information instead of the extrinsic information to improve the reliability of the estimated sequences. Replacing hard decision with soft decision reduces the effects of the error propagation. Meanwhile, combining soft decision with sequence-based detection provides more reliable information for the calculation of the APP. Simulation results show the new proposed equalizer leads to better performance compared to the Linear Minimum Mean Square Error (LMMSE) equalizers and the BDFE with hard feedback without sacrificing the computational complexity.
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