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Spatially-Coupled Nearly-Regular LDPC Code Ensembles for Rate-Flexible Code Design

Nitzold, Walter; Lentmaier, Michael LU and Fettweis, Gerhard (2014) IEEE International Conference on Communications (ICC), 2014 In [Host publication title missing]
Abstract
Spatially coupled regular LDPC code ensembles have outstanding performance with belief propagation decoding and can perform close to the Shannon limit. In this paper we investigate the suitability of coupled regular LDPC code ensembles with respect to rate-flexibility. Regular ensembles with good performance and low complexity exist for a variety of specific code rates. On the other hand it can be observed that outside this set of favorable rational rates the complexity and performance become unreasonably high. We therefore propose ensembles with slight irregularity that allow us to smoothly cover the complete range of rational rates. Our simple construction allows a performance with negligible gap to the Shannon limit while maintaining... (More)
Spatially coupled regular LDPC code ensembles have outstanding performance with belief propagation decoding and can perform close to the Shannon limit. In this paper we investigate the suitability of coupled regular LDPC code ensembles with respect to rate-flexibility. Regular ensembles with good performance and low complexity exist for a variety of specific code rates. On the other hand it can be observed that outside this set of favorable rational rates the complexity and performance become unreasonably high. We therefore propose ensembles with slight irregularity that allow us to smoothly cover the complete range of rational rates. Our simple construction allows a performance with negligible gap to the Shannon limit while maintaining complexity as low as for the best regular code ensembles. At the same time the construction guarantees that asymptotically the minimum distance grows linearly with the length of the coupled blocks. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
LDPC codes, spatial coupling, LDPC convolutional codes
in
[Host publication title missing]
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE International Conference on Communications (ICC), 2014
external identifiers
  • Scopus:84907001186
language
English
LU publication?
yes
id
5c1d6392-823f-47ac-9a3e-5ec271dd11be (old id 4248121)
date added to LUP
2014-01-21 10:54:38
date last changed
2016-10-13 04:47:14
@misc{5c1d6392-823f-47ac-9a3e-5ec271dd11be,
  abstract     = {Spatially coupled regular LDPC code ensembles have outstanding performance with belief propagation decoding and can perform close to the Shannon limit. In this paper we investigate the suitability of coupled regular LDPC code ensembles with respect to rate-flexibility. Regular ensembles with good performance and low complexity exist for a variety of specific code rates. On the other hand it can be observed that outside this set of favorable rational rates the complexity and performance become unreasonably high. We therefore propose ensembles with slight irregularity that allow us to smoothly cover the complete range of rational rates. Our simple construction allows a performance with negligible gap to the Shannon limit while maintaining complexity as low as for the best regular code ensembles. At the same time the construction guarantees that asymptotically the minimum distance grows linearly with the length of the coupled blocks.},
  author       = {Nitzold, Walter and Lentmaier, Michael and Fettweis, Gerhard},
  keyword      = {LDPC codes,spatial coupling,LDPC convolutional codes},
  language     = {eng},
  publisher    = {ARRAY(0x92d6b90)},
  series       = {[Host publication title missing]},
  title        = {Spatially-Coupled Nearly-Regular LDPC Code Ensembles for Rate-Flexible Code Design},
  year         = {2014},
}