Low-density parity-check codes for nonergodic block-fading channels

  • Authors:
  • Joseph Jean Boutros;Albert Guillén i Fàbregas;Ezio Biglieri;Gilles Zémor

  • Affiliations:
  • Texas A&M Umverslty at Qatar, Doha, Qatar;Department of Engineering, University of Cambridge, Cambridge, UK;Universitat Pompeu Fabra, Barcelona, Spain;Institut de Mathématiques de Bordeaux, Univesité de Bordeaux 1, Bordeaux, France

  • Venue:
  • IEEE Transactions on Information Theory
  • Year:
  • 2010

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We design powerful low-density parity-check (LDPC) codes with iterative decoding for the block-fading channel. We first study the case of maximum-likelihood decoding, and show that the design criterion is rather straightforward. Since optimal constructions for maximum-likelihood decoding do not perform well under iterative decoding, we introduce a new family of full-diversity LDPC codes that exhibit near-outage-limit performance under iterative decoding for all block-lengths. This family competes favorably with multiplexed parallel turbo codes for nonergodic channels.