On Generic Erasure Correcting Sets and Related Problems

被引:6
作者
Ahlswede, Rudolf [1 ]
Aydinian, Harout [1 ]
机构
[1] Univ Bielefeld, Dept Math, D-33501 Bielefeld, Germany
关键词
Generic erasure correcting set; intersecting code; iterative decoding; stopping redundancy; STOPPING REDUNDANCY; CODES; BOUNDS;
D O I
10.1109/TIT.2011.2173729
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Motivated by iterative decoding techniques for the binary erasure channel Hollmann and Tolhuizen introduced and studied the notion of generic erasure correcting sets for linear codes. A generic (r, s)-erasure correcting set generates for all codes of codimension a parity check matrix that allows iterative decoding of all correctable erasure patterns of size or less. The problem is to derive bounds on the minimum size F(r, s) of generic erasure correcting sets and to find constructions for such sets. In this paper, we continue the study of these sets. We derive better lower and upper bounds. Hollmann and Tolhuizen also introduced the stronger notion of (r, s)-sets and derived bounds for their minimum size G(r, s). Here also we improve these bounds. We observe that these two conceps are closely related to so called s-wise intersecting codes, an area, in which G(r, s) has been studied primarily with respect to ratewise performance. We derive connections. Finally, we observed that hypergraph covering can be used for both problems to derive good upper bounds.
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页码:501 / 508
页数:8
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