Spatially-coupled codes for side-information problems Conference Paper uri icon

abstract

  • For compound LDGM/LDPC codes with maximum a posteriori (MAP) processing, Wainwright and Martinian showed that the information-theoretic rate regions of the Wyner-Ziv (WZ) and Gelfand-Pinsker (GP) problems are achievable. For the same ensemble, these rates do not appear to be achievable with message-passing guided decimation (GD). Fortunately, spatially-coupled (SC) codes seem to provide an elegant remedy when iterative decoding falls short of MAP decoding. In particular, Aref et al. recently introduced SC LDGM codes that approach the rate-distortion region with belief-propagation guided decimation (BPGD). In this paper, we show that SC compound LDGM/LDPC codes with BPGD can approach the rate regions of the WZ and GP problems. 2014 IEEE.

name of conference

  • 2014 IEEE International Symposium on Information Theory (ISIT)

published proceedings

  • 2014 IEEE International Symposium on Information Theory

author list (cited authors)

  • Kumar, S., Vem, A., Narayanan, K., & Pfister, H. D.

citation count

  • 3

complete list of authors

  • Kumar, Santhosh||Vem, Avinash||Narayanan, Krishna||Pfister, Henry D

publication date

  • June 2014

publisher