Design of repeat-accumulate codes for iterative detection and decoding

  • Authors:
  • S. ten Brink;G. Kramer

  • Affiliations:
  • Bell Labs., Crawford Hill, NJ, USA;-

  • Venue:
  • IEEE Transactions on Signal Processing
  • Year:
  • 2003

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Abstract

Extrinsic information transfer (EXIT) charts are used to design systematic and nonsystematic repeat-accumulate (RA) codes for iterative detection and decoding. The convergence problems of nonsystematic RA codes are solved by introducing a biregular, or doped, layer of check nodes. As examples, such nonsystematic codes are designed for multi-input/multi-output (MIMO) fading channels and are shown to operate close to capacity.