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Spatial coupling for distributed storage and diversity applications

Abstract : Low-density parity-check codes are considered for erasure channels, mainly Root-LDPC codes that include a special type of checknodes. Spatial coupling is applied on parity bits of a Root-LDPC ensemble designed for a channel with 4 block-erasure states and a maximal design rate of 3/4 attaining double diversity. The advantage of spatial coupling is shown in the erasure plane as an improvement of a threshold boundary, under independent erasures. The spatial coupling maintains the double diversity because it connects parity bits only. The drawback of this partial coupling is a weak saturation of the threshold boundary towards the capacity boundary.
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Contributor : Léna Le Roy <>
Submitted on : Tuesday, July 17, 2018 - 2:35:42 PM
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F. Jardel, J.J. Boutros, V. Dedeoglu, M. Sarkiss, Ghaya Rekaya-Ben Othman. Spatial coupling for distributed storage and diversity applications. 2015 5th International Conference on Communications and Networking (COMNET), Nov 2016, Tunis, Tunisia. ⟨10.1109/COMNET.2015.7566624⟩. ⟨cea-01841673⟩



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