Robust DFE's, NUTEK-conf. in Uppsala 1992

Robust Decision Feedback Equalizers

NUTEK Workshop on Digital Communications,
Uppsala, Sweden, May 25-26, 1992.

Outline:: When digital data are transmitted over dispersive radio channels, a Decision Feedback Equalizer (DFE) can be utilized to estimate transmitted symbols. The paper presents a model-bases methodology for robust design, aimed at reducing the effect of model uncertainties and of decision errors in the feedback loop.
Abstract:: Design equations are presented for robust and realizable decision feedback equalizers, for IIR channels with coloured noise. Given a probabilistic measure of model uncertainty, the mean MSE, averaged over the whole class of possible models, is minimized. A robustification parameter, which trades off error propagation against theoretical performance, is also introduced. The resulting design equations define a large class of equalizers, with DFE's and linear equalizers based on nominal models being special cases.
Related publications:: Conference paper in IEEE ICASSP'93 on the above theme.
Licentiate Thesis by Erik Lindskog, May 1995, which includes ICASSP paper.
Robustification against time-variations within a GSM TDMA frame.
Robust filter design and uncertainty modelling, as described in Automatica 1993.

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