Partial-Response and Decision-Feedback Equalization

  • Jan W. M. Bergmans


The perpetual push for higher bit rates and higher storage densities spurs a steady increment of the amplitude distortion of many types of transmission and storage channels. The linear equalizer (LE), discussed in Chapter 5, is ill-matched to this trend because its noise enhancement will increase and eventually become untolerable. In the present chapter we discuss two receiver types that run much less rapidly out of steam. These are the partial-response equalizer (PRE) and the decision-feedback equalizer (DFE). Both are rooted in old telegraph tricks and just as the LE they take instantaneous decisions with respect to the incoming data The DFE is more powerful than the PRE and is, in fact, the optimum receiver with no detection delay. Performance improvements beyond the DFE rest in the capability to defer decisions for some time. This capability is a distinguishing feature of the Viterbi detector, discussed in Chapter 7.


Impulse Response Minimum Phase Linear Equalizer Transmit Filter Symbol Interval 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media Dordrecht 1996

Authors and Affiliations

  • Jan W. M. Bergmans
    • 1
  1. 1.Philips ResearchEindhovenThe Netherlands

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