Rate-Compatible Spatially-Coupled LDPC Code Ensembles With Nearly-Regular Degree Distributions
(2015) IEEE International Symposium on Information Theory (ISIT), 2015 p.41-45- Abstract
- Spatially-coupled regular LDPC code ensembles have outstanding performance with belief propagation decoding and can perform arbitrarily close to the Shannon limit without requiring irregular graph structures. In this paper, we are concerned with the performance and complexity of spatially-coupled ensembles with a rate-compatibility constraint. Spatially-coupled regular ensembles that support rate-compatibility through extension have been proposed before and show very good performance if the node degrees and the coupling width are chosen appropriately. But due to the strict constraint of maintaining a regular degree, there exist certain unfavorable rates that exhibit bad performance and high decoding complexity. We introduce an altered LDPC... (More)
- Spatially-coupled regular LDPC code ensembles have outstanding performance with belief propagation decoding and can perform arbitrarily close to the Shannon limit without requiring irregular graph structures. In this paper, we are concerned with the performance and complexity of spatially-coupled ensembles with a rate-compatibility constraint. Spatially-coupled regular ensembles that support rate-compatibility through extension have been proposed before and show very good performance if the node degrees and the coupling width are chosen appropriately. But due to the strict constraint of maintaining a regular degree, there exist certain unfavorable rates that exhibit bad performance and high decoding complexity. We introduce an altered LDPC ensemble construction that changes the evolution of degrees over subsequent incremental redundancy steps in such a way, that the degrees can be kept low to achieve outstanding performance close to Shannon limit for all rates. These ensembles always outperform their regular counterparts at small coupling width. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/7442603
- author
- Nitzold, Walter ; Lentmaier, Michael LU and Fettweis, Gerhard
- organization
- publishing date
- 2015
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- incremental redundancy, spatially coupled codes, spatial coupling, LDPC codes, rate-compatible
- host publication
- 2015 IEEE International Symposium on Information Theory (ISIT)
- pages
- 5 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- conference name
- IEEE International Symposium on Information Theory (ISIT), 2015
- conference location
- Hong Kong, China
- conference dates
- 2015-06-14 - 2015-06-19
- external identifiers
-
- scopus:84969771749
- ISBN
- 978-1-4673-7704-1
- DOI
- 10.1109/ISIT.2015.7282413
- language
- English
- LU publication?
- yes
- id
- 3ec9e859-cac9-42b4-83a0-27ae84dda4fe (old id 7442603)
- date added to LUP
- 2016-04-04 11:06:26
- date last changed
- 2022-01-29 21:20:12
@inproceedings{3ec9e859-cac9-42b4-83a0-27ae84dda4fe,
abstract = {{Spatially-coupled regular LDPC code ensembles have outstanding performance with belief propagation decoding and can perform arbitrarily close to the Shannon limit without requiring irregular graph structures. In this paper, we are concerned with the performance and complexity of spatially-coupled ensembles with a rate-compatibility constraint. Spatially-coupled regular ensembles that support rate-compatibility through extension have been proposed before and show very good performance if the node degrees and the coupling width are chosen appropriately. But due to the strict constraint of maintaining a regular degree, there exist certain unfavorable rates that exhibit bad performance and high decoding complexity. We introduce an altered LDPC ensemble construction that changes the evolution of degrees over subsequent incremental redundancy steps in such a way, that the degrees can be kept low to achieve outstanding performance close to Shannon limit for all rates. These ensembles always outperform their regular counterparts at small coupling width.}},
author = {{Nitzold, Walter and Lentmaier, Michael and Fettweis, Gerhard}},
booktitle = {{2015 IEEE International Symposium on Information Theory (ISIT)}},
isbn = {{978-1-4673-7704-1}},
keywords = {{incremental redundancy; spatially coupled codes; spatial coupling; LDPC codes; rate-compatible}},
language = {{eng}},
pages = {{41--45}},
publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
title = {{Rate-Compatible Spatially-Coupled LDPC Code Ensembles With Nearly-Regular Degree Distributions}},
url = {{https://lup.lub.lu.se/search/files/5695971/7442609.pdf}},
doi = {{10.1109/ISIT.2015.7282413}},
year = {{2015}},
}