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Paper detail

Searching for Voltage Graph-Based LDPC Tailbiting Codes with Large Girth

The relation between parity-check matrices of quasi-cyclic (QC) low-density parity-check (LDPC) codes and biadjacency matrices of bipartite graphs supports searching for powerful LDPC block codes. Using the principle of tailbiting, compact representations of bipartite graphs based on convolutional codes can be found. Bounds on the girth and the minimum distance of LDPC block codes constructed in such a way are discussed. Algorithms for searching iteratively for LDPC block codes with large girth and for determining their minimum distance are presented. Constructions based on all-ones matrices, Steiner Triple Systems, and QC block codes are introduced. Finally, new QC regular LDPC block codes with girth up to 24 are given.

preprint2011arXivOpen access
Irina E. BocharovaFlorian HugRolf JohannessonBoris D. KudryashovRoman V. Satyukov
math.ITInformation Theory
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Irina E. BocharovaFlorian HugRolf JohannessonBoris D. KudryashovRoman V. Satyukov

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