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arXiv · 1204.4864

Tight lower bound of consecutive lengths for QC-LDPC codes with girth twelve

Zhang GuoHua·Wang XinMei
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Abstract

For an arbitrary (3,L) QC-LDPC code with a girth of twelve, a tight lower bound of the consecutive lengths is proposed. For an arbitrary length above the bound the resultant code necessarily has a girth of twelve, and for the length meeting the bound, the corresponding code inevitably has a girth smaller than twelve. The conclusion can play an important role in the proofs of the existence of large-girth QC-LDPC codes, the construction of large-girth QC-LDPC codes based on the Chinese remainder theorem, and the construction of LDPC codes with the guaranteed error correction capability.

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Zhang GuoHua, Wang XinMei. 2012-04-22. Tight lower bound of consecutive lengths for QC-LDPC codes with girth twelve. https://arxiv.org/abs/1204.4864

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