Parallel access by butterfly networks for any degree permutation polynomial and ARP interleavers |
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Authors: | Lucian Trifina Daniela Tarniceriu |
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Institution: | Department of Telecommunications and Information Technologies, “Gheorghe Asachi” Technical University, Faculty of Electronics, Telecommunications and Information Technology, Bd. Carol I, no. 11A, Iasi 700506, Romania |
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Abstract: | Using more processors for parallel turbo decoding is an important issue to speed up the processing at the receiver of a communication system. Butterfly networks used to map the addresses of extrinsic values represent an elegant and simple solution in parallel turbo decoding. Recently, it has been shown that quadratic permutation polynomial (QPP) interleavers allow an easy way to compute the control bits for a butterfly network. In this paper we show that not only QPP interleavers, but any degree permutation polynomial (PP) interleavers and almost regular permutation (ARP) interleavers also allow the same easy way to compute the control bits required in butterfly networks. As a consequence, it is useful to apply the butterfly networks in parallel turbo decoding when using these performant algebraic interleavers. |
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Keywords: | Corresponding author |
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