Mitigation Of Error Propagation In Decision Feedback Equalization
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Mitigating Error Propagation Effects in a Decision Feedback Equalizer
This paper presents an approximate analysis approach to the computation of probability of error and mean burst error length for a decision feedback equalizer (DFE) that takes into account feedback of decision errors. The method uses a reduced-state Markov model of the feedback process and is applicable to linear modulation formats. This technique was used to analyze a DFE design that mitigates the effects of feedback error by incorporating a soft decision device into the feedback path and a norm constraint on the feedback filter weights. The DFE design and analysis approach was applied to a dispersive multipath propagation environment.