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[Keyword] baudrate sampling(1hit)

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  • A Fast Timing Recovery Method with a Decision Feedback Equalizer for Baudrate Sampling

    Akihiko SUGIYAMA  Tomokazu ITO  

     
    PAPER-Digital Signal Processing

      Vol:
    E79-A No:8
      Page(s):
    1267-1273

    This paper proposes a fast timing recovery method with a decision feedback equalizer for baudrate sampling. The proposed method features two special techniques. The first one is for coarse estimation of the sampling phase. Internal signals of the oversampled analog-to-digital converter at different phases are directly taken out for parallel evaluation. The second technique provides fine tuning with a phase-modification stepsize which is adaptively controlled by the residual intersymbol interference. Simulation results by a full-duplex digital transmission system with a multilevel line code show superiority of the proposed method. The coarse timing estimation and the fine tuning reduce 75% and 40% of the time required by the conventional method,respectively. The overall saving in timing recovery is almost 60% over the conventional method. The proposed method could easily be extended to other applications with a decision feedback equalizer.