DocumentCode :
3547963
Title :
EXIT-chart-based threshold calculation of LDPC code in 2D ISI channels
Author :
Lingjun Kong ; Yong Liang Guan ; Guojun Han ; Kui Cai ; Kheong-Sann Chan
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
fYear :
2013
fDate :
29-31 Aug. 2013
Firstpage :
287
Lastpage :
292
Abstract :
An algorithm based on the fitting of modified Extrinsic Information Transfer (EXIT) chart is proposed to calculate the thresholds of low-density parity-check (LDPC) codes optimized for the two-dimensional (2D) intersymbol interference (ISI) channels encountered in high-density magnetic recording, such as bit-patterned magnetic recording (BPMR) and two-dimensional magnetic recording (TDMR). The modified EXIT chart algorithm determines the LDPC threshold by fitting the EXIT curve of the variable node decoder (VND) combined with 2D detector (2D-DET) to the EXIT curve of the check node decoder (CND). Both the optimal Bahl-Cocke-Jelinek-Raviv (BCJR) 2D-DET and reduced-complexity Gaussian-approximated iterative row-column 2D-DET are considered.
Keywords :
intersymbol interference; iterative methods; parity check codes; 2D ISI channels; BCJR 2D-DET; BPMR; Bahl-Cocke-Jelinek-Raviv 2D-DET; CND; EXIT-chart-based threshold calculation; ISI channels; LDPC code; TDMR; VND; bit-patterned magnetic recording; check node decoder; high-density magnetic recording; low-density parity-check codes; modified extrinsic information transfer chart; reduced-complexity Gaussian-approximated iterative row-column 2D-DET; two-dimensional intersymbol interference channels; two-dimensional magnetic recording; variable node decoder; Bit error rate; Decoding; Detectors; Iterative decoding; Magnetic recording; Mutual information;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications (APCC), 2013 19th Asia-Pacific Conference on
Conference_Location :
Denpasar
Print_ISBN :
978-1-4673-6048-7
Type :
conf
DOI :
10.1109/APCC.2013.6765958
Filename :
6765958
Link To Document :
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