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- W2950429483 abstract "For a given family of spatially coupled codes, we prove that the threshold on the BSC of the graph cover ensemble is the same as the threshold on the BSC of the derived spatially coupled ensemble. This result is in contrast with the fact that the BP threshold of the derived spatially coupled ensemble is believed to be larger than the BP threshold of the graph cover ensemble as noted by the work of Kudekar et al. (2011, 2012). To prove this, we establish some properties related to the dual witness for decoding which was introduced by Feldman et al. (2007) and simplified by Daskalakis et al. (2008). More precisely, we prove that the existence of a dual witness which was previously known to be sufficient for decoding success is also necessary and is equivalent to the existence of certain acyclic hyperflows. We also derive a sublinear (in the block length) upper bound on the weight of any edge in such hyperflows, both for regular LPDC codes and for spatially coupled codes and we prove that the bound is asymptotically tight for regular LDPC codes. Moreover, we show how to trade crossover probability for LP excess on all the variable nodes, for any binary linear code." @default.
- W2950429483 created "2019-06-27" @default.
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- W2950429483 date "2013-01-27" @default.
- W2950429483 modified "2023-10-01" @default.
- W2950429483 title "Linear Programming Decoding of Spatially Coupled Codes" @default.
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