Weight distribution and decoding of codes on hypergraphs
Dept. of ECE and Institute for Systems Research, University of Maryland, College Park, MD 20742
Department of Electrical and Computer Engineering, University of Maryland, College Park, MD 20742, United States
Institut de Mathématiques de Bordeaux, Université de Bordeaux 1, 351 cours de la Libération, 33405 Talence, France
In this paper we study two aspects of hypergraph codes. First, we compute the weight enumerators of several ensembles of such codes, establishing conditions under which they attain the Gilbert-Varshamov bound and deriving estimates of their distance. In particular, we show that this bound is attained by codes constructed on a fixed bipartite graph with a large spectral gap.
We also suggest a new decoding algorithm of hypergraph codes that corrects a constant fraction of errors, improving upon the algorithm of Bilu and Hoory.
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