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Reliability Based Soft Transition Technique for Dual-Mode Blind Equalizers

Summary: Reliability Based Soft Transition Technique for
Dual-Mode Blind Equalizers
Wee Gin Lim, Rodney A. Kennedy, and Thushara D. Abhayapala
Department of Telecommunication Engineering,
Australian National University
Canberra, ACT, 0200, Australia
[WeeGin.Lim, Rodney.Kennedy, Thushara.Abhayapala]@anu.edu.au
Abstract-- In this paper, we propose a new technique that
facilitates soft transition between a startup algorithm and a
decision directed (DD) algorithm in blind adaptive equalizers.
The algorithm-pair is combined using a reliability measure that
is proportional to an estimate of the probability of the equalizer
detecting a correct symbol. This measure takes into account both
the equalized signal and its statistical distribution. The main
feature of the technique is in the smooth and automatic switching
from the startup algorithm to the DD algorithm and vice versa
depending on the value of the reliability measure. This technique
has been compared with the popular Benveniste-Goursat and
Stop-And-Go algorithms and is shown to exhibit a faster rate of
convergence and lower steady state error.


Source: Abhayapala, Thushara D. - Department of Information Engineering, Australian National University


Collections: Computer Technologies and Information Sciences