Abstract
An upper bound for the minimum distance of turbo codes with Welch-Costas interleavers is established. This paper also proposes a modified Welch-Costas interleaver for which the obtained minimum distance is larger than the established upper bound. At the cost of a slight increase of memory compared to the classic Welch-Costas interleaver, the minimum distance obtained by the proposed method is comparable to that corresponding to the S-random interleaver.
Résumé
Une limite supérieure pour la distance minimale des turbocodes avec des entrelaceurs de Welch-Costas est établie. Cet article propose aussi un entrelaceur Welch-Costas modifié pour lequel la distance minimale obtenue est plus grande que la limite supérieure établie. Au coût d’une légère augmentation de mémoire par rapport à Ventrelaceur classique Welch-Costas, la distance minimale obtenue par la méthode proposée est comparable à celle correspondant à Ventrelaceur S-aléatoire.
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Trifina, L., Munteanu, V. & Tarniceriu, D. Turbo codes with modified welch-costas interleavers. Ann. Telecommun. 62, 1045–1052 (2007). https://doi.org/10.1007/BF03253305
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DOI: https://doi.org/10.1007/BF03253305