On Generic Erasure Correcting Sets and Related Problems
Rudolf Ahlswede, Harout Aydinian · IEEE Transactions on Information Theory · 2012
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 codimensionra parity check matrix that allows iterative decoding of all correctable erasure patterns of sizesor less. The problem is to derive bounds on the minimum sizeF(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 sizeG(r,s) . Here also we improve these bounds. We observe that these two conceps are closely related to so calleds-wise intersecting codes, an area, in whichG(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.