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Communication Dans Un Congrès Année : 1999

Blind spatio-temporal Decision Feedback Equalization : a Self Adaptative Structure Approach

Joël Labat
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Christophe Laot

Résumé

It is well known that the performances of any receiver can be improved by means of equalization and diversity combining. However, the problem of the blind adaptation is entirely open in the case of decision feedback equalization. This paper attempts to introduce a new scheme of blind spatio-temporal equalizer whose main feature is its ability to self-adapt both its structure and its criteria to the encountered situations. Simulations results are given for a 4-QAM signal and compared to those of the classical constant modulus algorithm (CMA) spatio-temporal equalizer. The results are really convincing : it clearly appears that the new equalizer exhibits very good performances in terms of mean square erro, bit error rate as well as convergence speed. From all these points of view, it largely outperforms the classical CMA linear equalizer. As a result, this new blind spatio-temporal equalizer turns out to be very attractive for many applications
It is well known that the performances of any receiver can be improved by means of equalization and diversity combining. However, the problem of the blind adaptation is entirely open in the case of decision feedback equalization. This paper attempts to introduce a new scheme of blind spatio-temporal equalizer whose main feature is its ability to self-adapt both its structure and its criteria to the encountered situations. Simulations results are given for a 4-QAM signal and compared to those of the classical constant modulus algorithm (CMA) spatio-temporal equalizer. The results are really convincing : it clearly appears that the new equalizer exhibits very good performances in terms of mean square erro, bit error rate as well as convergence speed. From all these points of view, it largely outperforms the classical CMA linear equalizer. As a result, this new blind spatio-temporal equalizer turns out to be very attractive for many applications.
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Dates et versions

hal-02146220 , version 1 (03-06-2019)

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  • HAL Id : hal-02146220 , version 1

Citer

Joël Labat, Christophe Laot. Blind spatio-temporal Decision Feedback Equalization : a Self Adaptative Structure Approach. 99 Globecom, Dec 1999, Rio De Janeiro, Brésil. pp.2301 - 2305. ⟨hal-02146220⟩
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