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arXiv · 2103.09722

Moderate Density Parity-Check Codes from Projective Bundles

Jessica Bariffi·Sam Mattheus·Alessandro Neri·Joachim Rosenthal
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Abstract

A new construction for moderate density parity-check (MDPC) codes using finite geometry is proposed. We design a parity-check matrix for this family of binary codes as the concatenation of two matrices: the incidence matrix between points and lines of the Desarguesian projective plane and the incidence matrix between points and ovals of a projective bundle. A projective bundle is a special collection of ovals which pairwise meet in a unique point. We determine minimum distance and dimension of these codes, showing that they have a natural quasi-cyclic structure. In addition, we analyze the error-correction performance within one round of a modification of Gallager's bit-flipping decoding algorithm. In this setting, our codes have the best possible error-correction performance for this range of parameters.

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Jessica Bariffi, Sam Mattheus, Alessandro Neri, Joachim Rosenthal. 2021-03-17. Moderate Density Parity-Check Codes from Projective Bundles. https://arxiv.org/abs/2103.09722

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