An optimized initialization for LDPC decoding over GF(q) in impulsive noise environments.

Modern navigation satellite communication has the characteristic of high transmitting rate. To avoid bit errors in data transmission, low density parity check (LDPC) codes are widely recognized as efficient ways for navigation communication. Conventionally, the LDPC decoding is applied for additive...

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Autores principales:	Haoqiang Liu, Hongbo Zhao, Xiaowen Chen, Wenquan Feng
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c26a4522e80d401e8ff3976eba991191
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spelling	oai:doaj.org-article:c26a4522e80d401e8ff3976eba9911912021-11-25T05:54:16ZAn optimized initialization for LDPC decoding over GF(q) in impulsive noise environments.1932-620310.1371/journal.pone.0250930https://doaj.org/article/c26a4522e80d401e8ff3976eba9911912021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0250930https://doaj.org/toc/1932-6203Modern navigation satellite communication has the characteristic of high transmitting rate. To avoid bit errors in data transmission, low density parity check (LDPC) codes are widely recognized as efficient ways for navigation communication. Conventionally, the LDPC decoding is applied for additive white Gaussian noise (AWGN) channel and degrades severely while facing the impulsive noise. However, navigation communication often suffers from impulsive interference due to the occurrence of high amplitude "spikes". At this time, the conventional Gaussian noise assumption is inadequate. The impulsive component of interference has been found to be significant which influences the reliability of transmitted information. Therefore the LDPC decoding algorithms for AWGN channel are not suitable for impulsive noise environments. Consider that LDPC codes over GF(q) perform better than binary LDPC in resisting burst errors for current navigation system, it is necessary to conduct research on LDPC codes over GF(q). In this paper, an optimized initialization by calculating posterior probabilities of received symbols is proposed for non-binary LDPC decoding on additive white Class A noise (AWAN) channel. To verify the performance of the proposed initialization, extensive experiments are performed in terms of convergence, validity, and robustness. Preliminary results demonstrate that the decoding algorithm with the optimized initialization for non-binary LDPC codes performs better than the competing methods and that of binary LDPC codes on AWAN channel.Haoqiang LiuHongbo ZhaoXiaowen ChenWenquan FengPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 5, p e0250930 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Haoqiang Liu Hongbo Zhao Xiaowen Chen Wenquan Feng An optimized initialization for LDPC decoding over GF(q) in impulsive noise environments.
description	Modern navigation satellite communication has the characteristic of high transmitting rate. To avoid bit errors in data transmission, low density parity check (LDPC) codes are widely recognized as efficient ways for navigation communication. Conventionally, the LDPC decoding is applied for additive white Gaussian noise (AWGN) channel and degrades severely while facing the impulsive noise. However, navigation communication often suffers from impulsive interference due to the occurrence of high amplitude "spikes". At this time, the conventional Gaussian noise assumption is inadequate. The impulsive component of interference has been found to be significant which influences the reliability of transmitted information. Therefore the LDPC decoding algorithms for AWGN channel are not suitable for impulsive noise environments. Consider that LDPC codes over GF(q) perform better than binary LDPC in resisting burst errors for current navigation system, it is necessary to conduct research on LDPC codes over GF(q). In this paper, an optimized initialization by calculating posterior probabilities of received symbols is proposed for non-binary LDPC decoding on additive white Class A noise (AWAN) channel. To verify the performance of the proposed initialization, extensive experiments are performed in terms of convergence, validity, and robustness. Preliminary results demonstrate that the decoding algorithm with the optimized initialization for non-binary LDPC codes performs better than the competing methods and that of binary LDPC codes on AWAN channel.
format	article
author	Haoqiang Liu Hongbo Zhao Xiaowen Chen Wenquan Feng
author_facet	Haoqiang Liu Hongbo Zhao Xiaowen Chen Wenquan Feng
author_sort	Haoqiang Liu
title	An optimized initialization for LDPC decoding over GF(q) in impulsive noise environments.
title_short	An optimized initialization for LDPC decoding over GF(q) in impulsive noise environments.
title_full	An optimized initialization for LDPC decoding over GF(q) in impulsive noise environments.
title_fullStr	An optimized initialization for LDPC decoding over GF(q) in impulsive noise environments.
title_full_unstemmed	An optimized initialization for LDPC decoding over GF(q) in impulsive noise environments.
title_sort	optimized initialization for ldpc decoding over gf(q) in impulsive noise environments.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/c26a4522e80d401e8ff3976eba991191
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An optimized initialization for LDPC decoding over GF(q) in impulsive noise environments.

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