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Systematic Doping of SC-LDPC Codes

Zhu, Min ; Mitchell, David G.M. ; Lentmaier, Michael LU and Costello, Daniel J. (2022) 2022 IEEE International Symposium on Information Theory, ISIT 2022 p.536-541
Abstract

In this paper, we examine variable node (VN) doping to mitigate the error propagation problem in sliding window decoding (SWD) of spatially coupled LDPC (SC-LDPC) codes from the point of view of the encoding process. More specifically, in order to simplify the process of generating an encoded sequence with some number of doped code bits, we propose to employ systematic encoding and to limit doping to systematic bits only. Numerical results show that doping of systematic bits only achieves comparable performance to employing general (nonsystematic) encoding and full doping of all the code bits at each doping position, while benefiting from a much simpler encoding process. We then show that the inherent rate loss due to doping can be... (More)

In this paper, we examine variable node (VN) doping to mitigate the error propagation problem in sliding window decoding (SWD) of spatially coupled LDPC (SC-LDPC) codes from the point of view of the encoding process. More specifically, in order to simplify the process of generating an encoded sequence with some number of doped code bits, we propose to employ systematic encoding and to limit doping to systematic bits only. Numerical results show that doping of systematic bits only achieves comparable performance to employing general (nonsystematic) encoding and full doping of all the code bits at each doping position, while benefiting from a much simpler encoding process. We then show that the inherent rate loss due to doping can be reduced by doping only a fraction of the variable nodes at each doping position with only a minor impact on performance.

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Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
decoder error propagation, fractional doping, sliding window decoding, systematic doping, variable node doping
host publication
2022 IEEE International Symposium on Information Theory, ISIT 2022
pages
6 pages
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
conference name
2022 IEEE International Symposium on Information Theory, ISIT 2022
conference location
Espoo, Finland
conference dates
2022-06-26 - 2022-07-01
external identifiers
  • scopus:85136282243
ISBN
9781665421591
DOI
10.1109/ISIT50566.2022.9834590
language
English
LU publication?
yes
id
32f19f3e-7035-4647-8a28-6a6a17470510
date added to LUP
2022-09-12 14:51:40
date last changed
2023-11-21 11:16:59
@inproceedings{32f19f3e-7035-4647-8a28-6a6a17470510,
  abstract     = {{<p>In this paper, we examine variable node (VN) doping to mitigate the error propagation problem in sliding window decoding (SWD) of spatially coupled LDPC (SC-LDPC) codes from the point of view of the encoding process. More specifically, in order to simplify the process of generating an encoded sequence with some number of doped code bits, we propose to employ systematic encoding and to limit doping to systematic bits only. Numerical results show that doping of systematic bits only achieves comparable performance to employing general (nonsystematic) encoding and full doping of all the code bits at each doping position, while benefiting from a much simpler encoding process. We then show that the inherent rate loss due to doping can be reduced by doping only a fraction of the variable nodes at each doping position with only a minor impact on performance.</p>}},
  author       = {{Zhu, Min and Mitchell, David G.M. and Lentmaier, Michael and Costello, Daniel J.}},
  booktitle    = {{2022 IEEE International Symposium on Information Theory, ISIT 2022}},
  isbn         = {{9781665421591}},
  keywords     = {{decoder error propagation; fractional doping; sliding window decoding; systematic doping; variable node doping}},
  language     = {{eng}},
  pages        = {{536--541}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  title        = {{Systematic Doping of SC-LDPC Codes}},
  url          = {{http://dx.doi.org/10.1109/ISIT50566.2022.9834590}},
  doi          = {{10.1109/ISIT50566.2022.9834590}},
  year         = {{2022}},
}