NDLI: Iterative detection and decoding for non-binary LDPC coded partial-response channels with written-in errors

Content Provider	IET Digital Library
Author	Qin, Zhiliang Cai, Kui Ng, Yibin
Abstract	In this study, the authors investigate the performance of iterative detection and decoding for non-binary low-density parity-check (LDPC) coded partial-response (PR) channels, where written-in errors are present to introduce bit-flipping to LDPC code bits prior to the transmission over PR channels. From a probabilistic perspective, the written-in errors are modelled as the output of a binary symmetrical channel (BSC) with crossover probability equal to the write error probability. Several iterative receivers are presented for the considered system. Specifically, the authors propose a symbol-level Bahl-Cocke-Jelinek-Raviv (BCJR) channel detector based on a sectionalised representation of the joint BSC and PR trellis to produce directly the soft information of non-binary LDPC code symbols, thus avoiding suboptimal symbol/bit log-likelihood ratio conversions as required in bit-level detection schemes. Simulation results show that the proposed symbol-level iterative receiver provides much better bit-error-rate performance over bit-level schemes. Moreover, the proposed receiver enables non-binary LDPC codes to achieve a notable coding gain over their binary counterparts for channels affected with written-in errors.
Starting Page	399
Ending Page	406
Page Count	8
ISSN	17518628
Volume Number	10
e-ISSN	17518636
Issue Number	Issue 4, Mar (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/10/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2015.0615
Journal	IET Communications
Publisher Date	2016-03-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Binary Codes Binary Symmetrical Channel Bit-error-rate Performance Bit-level Detection Scheme BSC Channel Coding Code Crossover Write Error Probability Error Statistics Iterative Decoding Iterative Detection Low-density Parity-check Code Nonbinary LDPC Coded Partial-response Channel Parity Check Code PR Channel Probabilistic Perspective Probability Sectionalised Representation Statistics Suboptimal Symbol-bit Log-likelihood Ratio Conversion Symbol-level BCJR Channel Detector Symbol-level Iterative Receiver Trellis Code Written-in Error
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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