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Improving Short-Length LDPC Codes with a CRC and Iterative Ordered Statistic Decoding

Zhou, Wei LU and Lentmaier, Michael LU (2019) 53rd Conference on Information Sciences and Systems
Abstract
We present a CRC-aided decoding
scheme of LDPC codes that can outperform the underlying LDPC code under
ordered statistic decoding (OSD). In this scheme, the CRC is used
jointly with the LDPC code to construct a candidate list, instead
of conventionally being regarded as a detection code to prune
the list generated by the LDPC code alone. As an example we
consider a (128,64) 5G LDPC code with BP decoding, which we can
outperform by 2dB using a (128,72) LDPC code in combination
with a 8-bit CRC under OSD order of 3. The CRC-aided decoding scheme also achieves a better performance than the conventional one where CRC is used to prune the list. A manageable complexity can be achieved
with iterative... (More)
We present a CRC-aided decoding
scheme of LDPC codes that can outperform the underlying LDPC code under
ordered statistic decoding (OSD). In this scheme, the CRC is used
jointly with the LDPC code to construct a candidate list, instead
of conventionally being regarded as a detection code to prune
the list generated by the LDPC code alone. As an example we
consider a (128,64) 5G LDPC code with BP decoding, which we can
outperform by 2dB using a (128,72) LDPC code in combination
with a 8-bit CRC under OSD order of 3. The CRC-aided decoding scheme also achieves a better performance than the conventional one where CRC is used to prune the list. A manageable complexity can be achieved
with iterative reliability based OSD, which is demonstrated to
perform well with a small OSD order. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to conference
publication status
in press
subject
keywords
LDPC codes, CRC, Ordered Statistic Decoding, ML decoding
conference name
53rd Conference on Information Sciences and Systems
conference location
Baltimore, United States
conference dates
2019-03-20 - 2019-03-22
language
English
LU publication?
yes
id
a6b1d8ff-4fc3-414c-8532-ffa43b49864f
date added to LUP
2019-03-07 18:04:30
date last changed
2019-04-04 10:09:25
@misc{a6b1d8ff-4fc3-414c-8532-ffa43b49864f,
  abstract     = {We present a CRC-aided  decoding<br/>scheme of LDPC codes that can outperform the underlying LDPC code under<br/>ordered statistic decoding (OSD). In this scheme, the CRC is used<br/>jointly with the LDPC code to construct a candidate list, instead<br/>of conventionally being regarded as a detection code to prune<br/>the list generated by the LDPC code alone. As an example we<br/>consider a (128,64) 5G LDPC code with BP decoding, which we can<br/>outperform by 2dB using a (128,72) LDPC code in combination<br/>with a 8-bit CRC under OSD order of 3. The CRC-aided decoding scheme also achieves a better performance than the conventional  one where CRC is used to prune the list. A manageable complexity can be achieved<br/>with iterative reliability based OSD, which is demonstrated to<br/>perform well with a small OSD order.},
  author       = {Zhou, Wei and Lentmaier, Michael},
  keyword      = {LDPC codes,CRC,Ordered Statistic Decoding,ML decoding},
  language     = {eng},
  location     = {Baltimore, United States},
  title        = {Improving Short-Length LDPC Codes with a CRC and Iterative Ordered Statistic Decoding},
  year         = {2019},
}