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Analysis of low-density parity-check codes based on EXIT functions

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3 Author(s)
Sharon, E. ; Dept. of Electr. Eng. systems, Tel Aviv Univ., Ramat-Aviv ; Ashikhmin, A. ; Litsyn, S.

We exploit extrinsic information transfer functions of single parity-check and repetition codes over the binary input additive white Gaussian noise (biAWGN) channel, derived by the authors, for asymptotic performance analysis of belief propagation decoding of low-density parity-check codes. The approach is based on a Gaussian approximation (GA) of the density evolution algorithm using the mutual information measure. We show that this method allows more accurate prediction of the decoding threshold in the biAWGN channel than the earlier known GA methods

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Communications, IEEE Transactions on  (Volume:54 ,  Issue: 8 )