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The performance of a belief propagation decoder for low-density parity-check codes is limited by the presence of trapping sets in the code’s graph. This leads to an error floor at higher signal-to-noise ratios. We propose the use of an augmented decoder which operates by iteratively decoding on a set of graphs which have a subset of repeated check nodes. We compare the augmented decoder to other modified belief propagation decoders that have been presented in the literature. We show that for all the codes considered, the augmented decoder yields the best frame error rate in the error floor region.

Item Type:	Refereed Article
Keywords:	LDPC codes, BP decoding, trapping sets, error floor mitigation
Research Division:	Engineering
Research Group:	Electrical engineering
Research Field:	Electrical circuits and systems
Objective Division:	Environmental Policy, Climate Change and Natural Hazards
Objective Group:	Environmental policy, legislation and standards
Objective Field:	Environmental policy, legislation and standards not elsewhere classified
UTAS Author:	Rigby, AR (Mr Alex Rigby)
UTAS Author:	Olivier, JC (Professor JC Olivier)
UTAS Author:	Salmon, BP (Dr Brian Salmon)
ID Code:	128015
Year Published:	2018
Web of Science® Times Cited:	17
Deposited By:	Engineering
Deposited On:	2018-08-28
Last Modified:	2021-06-30
Downloads:	77 View Download Statistics