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Braided Convolutional Codes - A Class of Spatially Coupled Turbo-Like Codes

Lentmaier, Michael LU ; Moloudi, Saeedeh LU and Graell i Amat, Alexandre (2014) International Conference on Signal Processing and Communications (SPCOM) In [Host publication title missing]
Abstract
In this paper, we investigate the impact of spatial coupling on the thresholds of turbo-like codes. Parallel concatenated and serially concatenated convolutional codes as well as braided convolutional codes (BCCs) are compared by means of an exact density evolution (DE) analysis for the binary erasure channel (BEC). We propose two extensions of the original BCC ensemble to improve its threshold and demonstrate that their BP thresholds approach the maximum-a posteriori (MAP) threshold of the uncoupled ensemble. A comparison of the different ensembles shows that parallel concatenated ensembles can be outperformed by both serially concatenated and BCC ensembles, although they have the best BP thresholds in the uncoupled case.
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
turbo codes, braided codes, braided convolutional codes, LDPC convolutional codes, spatial coupling
in
[Host publication title missing]
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
International Conference on Signal Processing and Communications (SPCOM)
external identifiers
  • WOS:000364936400029
  • Scopus:84920722408
language
English
LU publication?
yes
id
f8c92d1c-ed52-4083-831d-46a1119549f8 (old id 4469395)
date added to LUP
2014-07-24 11:22:49
date last changed
2016-10-13 04:46:55
@misc{f8c92d1c-ed52-4083-831d-46a1119549f8,
  abstract     = {In this paper, we investigate the impact of spatial coupling on the thresholds of turbo-like codes. Parallel concatenated and serially concatenated convolutional codes as well as braided convolutional codes (BCCs) are compared by means of an exact density evolution (DE) analysis for the binary erasure channel (BEC). We propose two extensions of the original BCC ensemble to improve its threshold and demonstrate that their BP thresholds approach the maximum-a posteriori (MAP) threshold of the uncoupled ensemble. A comparison of the different ensembles shows that parallel concatenated ensembles can be outperformed by both serially concatenated and BCC ensembles, although they have the best BP thresholds in the uncoupled case.},
  author       = {Lentmaier, Michael and Moloudi, Saeedeh and Graell i Amat, Alexandre},
  keyword      = {turbo codes,braided codes,braided convolutional codes,LDPC convolutional codes,spatial coupling},
  language     = {eng},
  publisher    = {ARRAY(0xb4aff50)},
  series       = {[Host publication title missing]},
  title        = {Braided Convolutional Codes - A Class of Spatially Coupled Turbo-Like Codes},
  year         = {2014},
}