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Equalizers for transmultiplexers in orthogonal multiple carrier data transmission

ÉGaliseurs pour transmultiplexeurs en transmission de donnÉes par porteuses multiples orthogonales

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Abstract

Orthogonal multiple carrier data transmission systems are efficiently realized using modified dft transmultiplexer filter banks. In data transmission applications, a non-ideal transmission channel causes distortions such as intersymbol interference and crosstalk between the subrate bands of the transmultiplexer. Hence, in order to equalize these distortions, subband equalizers, which affect the intersymbol interference and crosstalk behavior, are considered for implementation. The special structure of modified dft transmultiplexers requires a discussion concerning the various possibilities of placing the subband equalizers at the receiver. Wiener solutions and lms adaptive algorithms for various new subband equalizer structures are derived and compared by means of simulation results.

Résumé

Les systèmes de transmission de données par porteuses multiples orthogonales sont réalisés efficacement en utilisant des bancs de filtres de transmultiplexeur avec tfd modifiée. Dans les applications de transmission de données, un canal non idéal produit des distorsions, notamment de ľinterférence entre symboles et de la diaphonie entre les sous-canaux du transmultiplexeur. Par suite, des égaliseurs de sous-bande sont mis en æuvre pour agir sur ľinterférence et la diaphonie. La structure spéciale des transmultiplexeurs avec tfd modifiée nécessite un examen des différentes possibilités pour placer les égaliseurs de sous-bande dans le récepteur. Des solutions de Wiener et des algorithmes adaptatifs lms sont élaborés pour différentes structures ďégaliseurs et comparés par simulation.

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Authors and Affiliations

  1. Telecommunications Institute, University of Erlangen-Nuremberg, Cauerstr. 7/NT, D-91058, Erlangen, Allemagne

    Thomas Wiegand

  2. Telecommunications Institute, Hamburg University of Technology, Eissendorfer Str. 40, D-21071, Hamburg, Allemagne

    Norbert J. Fliege

Authors
  1. Thomas Wiegand
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  2. Norbert J. Fliege
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Correspondence to Thomas Wiegand or Norbert J. Fliege.

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Wiegand, T., Fliege, N.J. Equalizers for transmultiplexers in orthogonal multiple carrier data transmission. Ann. Télécommun. 52, 39–45 (1997). https://doi.org/10.1007/BF03001048

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  • DOI: https://doi.org/10.1007/BF03001048

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