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Quasi-cyclic Generalized LDPC codes with low error floors

Liva, Gianluigi and Ryan, William E. and Chiani, Marco (2008) Quasi-cyclic Generalized LDPC codes with low error floors. IEEE Transactions on Communications, 56 (1), pp. 49-57. IEEE. DOI: 10.1109/TCOMM.2008.050600.

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In this paper, a novel methodology for designing structured generalized LDPC (G-LDPC) codes is presented. The proposed design results in quasi-cyclic G-LDPC codes for which efficient encoding is feasible through shift-register-based circuits. The structure imposed on the bipartite graphs, together with the choice of simple component codes, leads to a class of codes suitable for fast iterative decoding. A pragmatic approach to the construction of G-LDPC codes is proposed. The approach is based on the substitution of check nodes in the protograph of a low-density parity-check code with stronger nodes based, for instance, on Hamming codes. Such a design approach, which we call LDPC code doping, leads to low-rate quasi-cyclic G-LDPC codes with excellent performance in both the error floor and waterfall regions on the additive white Gaussian noise channel.

Document Type:Article
Title:Quasi-cyclic Generalized LDPC codes with low error floors
AuthorsInstitution or Email of Authors
Liva, GianluigiUNSPECIFIED
Ryan, William E.University of Arizona
Chiani, MarcoUniversity of Bologna
Date:1 January 2008
Journal or Publication Title:IEEE Transactions on Communications
Page Range:pp. 49-57
Keywords:Low-density parity-check codes, Generalized LDPC, turbo codes
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignement
DLR - Research area:Space
DLR - Program:W - no assignement
DLR - Research theme (Project):W -- no assignement (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Digital Networks
Deposited By: Dr. Gianluigi Liva
Deposited On:27 May 2008
Last Modified:12 Dec 2013 20:23

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