Title :
Mitigating error propagation effects in a decision feedback equalizer
Author :
Reuter, Michael ; Allen, Jeffery C. ; Zeidler, James R. ; North, Richard C.
Author_Institution :
SSC, San Diego, CA, USA
fDate :
11/1/2001 12:00:00 AM
Abstract :
We present an approximate analysis approach to the computation of the 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. We use this technique 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. We apply the DFE design and analysis approach to a dispersive multipath propagation environment
Keywords :
Markov processes; approximation theory; decision feedback equalisers; dispersive channels; error statistics; interference suppression; intersymbol interference; multipath channels; phase shift keying; DFE; DFE design; ISI suppression; M-PSK; M-ary phase shift keying; approximate analysis; decision errors feedback; decision feedback equalizer; dispersive multipath propagation environment; error probability; error propagation effects mitigation; feedback filter weights; intersymbol interference; linear modulation formats; mean burst error length; norm constraint; reduced-state Markov model; soft decision device; Computer errors; Decision feedback equalizers; Dispersion; Error analysis; Filters; Helium; Intersymbol interference; Markov processes; Modulation; Propagation delay;
Journal_Title :
Communications, IEEE Transactions on
