Improving Windowed Decoding of SC LDPC Codes by Effective Decoding Termination, Message Reuse, and Amplification

In this paper, we address a number of weaknesses of the windowed decoding of spatially coupled low-density parity-check (SC LDPC) codes and propose three modifications that simultaneously improve its performance, complexity, and latency. An effective termination method of the windowed decoding and t...

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Main Authors:	Inayat Ali, Jong-Hwan Kim, Sang-Hyo Kim, Heeyoul Kwak, Jong-Seon No
Format:	Article
Language:	English
Published:	IEEE 2018-01-01
Series:	IEEE Access
Subjects:	Spatially coupled LDPC codes windowed decoder density evolution decoding termination
Online Access:	https://ieeexplore.ieee.org/document/8101470/

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spelling	doaj-667a98800f044eb7885ca7736b7e1e5c2021-03-29T20:34:58ZengIEEEIEEE Access2169-35362018-01-0169336934610.1109/ACCESS.2017.27713758101470Improving Windowed Decoding of SC LDPC Codes by Effective Decoding Termination, Message Reuse, and AmplificationInayat Ali0https://orcid.org/0000-0002-0566-6405Jong-Hwan Kim1Sang-Hyo Kim2https://orcid.org/0000-0002-0660-5516Heeyoul Kwak3Jong-Seon No4College of Information and Communication Engineering, Sungkyunkwan University, Suwon, South KoreaCollege of Information and Communication Engineering, Sungkyunkwan University, Suwon, South KoreaCollege of Information and Communication Engineering, Sungkyunkwan University, Suwon, South KoreaDepartment of Electrical and Computer Engineering, INMC, Seoul National University, Seoul, South KoreaDepartment of Electrical and Computer Engineering, INMC, Seoul National University, Seoul, South KoreaIn this paper, we address a number of weaknesses of the windowed decoding of spatially coupled low-density parity-check (SC LDPC) codes and propose three modifications that simultaneously improve its performance, complexity, and latency. An effective termination method of the windowed decoding and the reuse of edge messages of previous target symbols provide a good performance-latency tradeoff when compared with the conventional windowed decoder. Also, we propose a scheme that lowers the error floor, in which the amplified edge messages of the previous window are used in the present window. The proposed windowed decoding, consisting of the three schemes, provides a significant performance gain with smaller latency. The validity of the new windowed decoding is verified by the evaluation with codes from different SC LDPC ensembles.https://ieeexplore.ieee.org/document/8101470/Spatially coupled LDPC codeswindowed decoderdensity evolutiondecoding termination
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Inayat Ali Jong-Hwan Kim Sang-Hyo Kim Heeyoul Kwak Jong-Seon No
spellingShingle	Inayat Ali Jong-Hwan Kim Sang-Hyo Kim Heeyoul Kwak Jong-Seon No Improving Windowed Decoding of SC LDPC Codes by Effective Decoding Termination, Message Reuse, and Amplification IEEE Access Spatially coupled LDPC codes windowed decoder density evolution decoding termination
author_facet	Inayat Ali Jong-Hwan Kim Sang-Hyo Kim Heeyoul Kwak Jong-Seon No
author_sort	Inayat Ali
title	Improving Windowed Decoding of SC LDPC Codes by Effective Decoding Termination, Message Reuse, and Amplification
title_short	Improving Windowed Decoding of SC LDPC Codes by Effective Decoding Termination, Message Reuse, and Amplification
title_full	Improving Windowed Decoding of SC LDPC Codes by Effective Decoding Termination, Message Reuse, and Amplification
title_fullStr	Improving Windowed Decoding of SC LDPC Codes by Effective Decoding Termination, Message Reuse, and Amplification
title_full_unstemmed	Improving Windowed Decoding of SC LDPC Codes by Effective Decoding Termination, Message Reuse, and Amplification
title_sort	improving windowed decoding of sc ldpc codes by effective decoding termination, message reuse, and amplification
publisher	IEEE
series	IEEE Access
issn	2169-3536
publishDate	2018-01-01
description	In this paper, we address a number of weaknesses of the windowed decoding of spatially coupled low-density parity-check (SC LDPC) codes and propose three modifications that simultaneously improve its performance, complexity, and latency. An effective termination method of the windowed decoding and the reuse of edge messages of previous target symbols provide a good performance-latency tradeoff when compared with the conventional windowed decoder. Also, we propose a scheme that lowers the error floor, in which the amplified edge messages of the previous window are used in the present window. The proposed windowed decoding, consisting of the three schemes, provides a significant performance gain with smaller latency. The validity of the new windowed decoding is verified by the evaluation with codes from different SC LDPC ensembles.
topic	Spatially coupled LDPC codes windowed decoder density evolution decoding termination
url	https://ieeexplore.ieee.org/document/8101470/
work_keys_str_mv	AT inayatali improvingwindoweddecodingofscldpccodesbyeffectivedecodingterminationmessagereuseandamplification AT jonghwankim improvingwindoweddecodingofscldpccodesbyeffectivedecodingterminationmessagereuseandamplification AT sanghyokim improvingwindoweddecodingofscldpccodesbyeffectivedecodingterminationmessagereuseandamplification AT heeyoulkwak improvingwindoweddecodingofscldpccodesbyeffectivedecodingterminationmessagereuseandamplification AT jongseonno improvingwindoweddecodingofscldpccodesbyeffectivedecodingterminationmessagereuseandamplification
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Improving Windowed Decoding of SC LDPC Codes by Effective Decoding Termination, Message Reuse, and Amplification

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