Write-margin improvement of non-binary LDPC coding and iterative decoding system in BPM R/W channel with write-errors

Yasuaki Nakamura; Yoshihiro Okamoto; Hisashi Osawa; Hajime Aoi; Hiroaki Muraoka

doi:10.1109/GLOCOM.2012.6503609

Write-margin improvement of non-binary LDPC coding and iterative decoding system in BPM R/W channel with write-errors

Yasuaki Nakamura, Yoshihiro Okamoto, Hisashi Osawa, Hajime Aoi, Hiroaki Muraoka

Broadband Engineering Division

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The write-margin of the iterative decoding systems for the binary and non-binary low-density parity-check (LDPC) codes are studied in the magnetic recording system using a bit-patterned medium (BPM) R/W channel with write-errors caused by the write-head field gradient, the media switching field distribution (SFD), the magnetization fields from adjacent islands, and the island position deviation. The performances of iterative decoding systems using the binary and non-binary LDPC codes are evaluated by computer simulation at an areal recording density of 2 Tb/inch². The results show that the non-binary LDPC coding and iterative decoding system improves the write-margin compared with the binary LDPC system. Furthermore it is clarified that in order to obtain the sufficient write-margin, it is important to suppress the influence of the demagnetization fields from adjacent islands.

Original language	English
Title of host publication	2012 IEEE Global Communications Conference, GLOBECOM 2012
Pages	3214-3218
Number of pages	5
DOIs	https://doi.org/10.1109/GLOCOM.2012.6503609
Publication status	Published - 2012 Dec 1
Event	2012 IEEE Global Communications Conference, GLOBECOM 2012 - Anaheim, CA, United States Duration: 2012 Dec 3 → 2012 Dec 7

Publication series

Name	GLOBECOM - IEEE Global Telecommunications Conference

Other

Other	2012 IEEE Global Communications Conference, GLOBECOM 2012
Country/Territory	United States
City	Anaheim, CA
Period	12/12/3 → 12/12/7

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/GLOCOM.2012.6503609

Cite this

Nakamura, Y., Okamoto, Y., Osawa, H., Aoi, H., & Muraoka, H. (2012). Write-margin improvement of non-binary LDPC coding and iterative decoding system in BPM R/W channel with write-errors. In 2012 IEEE Global Communications Conference, GLOBECOM 2012 (pp. 3214-3218). [6503609] (GLOBECOM - IEEE Global Telecommunications Conference). https://doi.org/10.1109/GLOCOM.2012.6503609

Write-margin improvement of non-binary LDPC coding and iterative decoding system in BPM R/W channel with write-errors. / Nakamura, Yasuaki; Okamoto, Yoshihiro; Osawa, Hisashi et al.
2012 IEEE Global Communications Conference, GLOBECOM 2012. 2012. p. 3214-3218 6503609 (GLOBECOM - IEEE Global Telecommunications Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Nakamura, Y, Okamoto, Y, Osawa, H, Aoi, H & Muraoka, H 2012, Write-margin improvement of non-binary LDPC coding and iterative decoding system in BPM R/W channel with write-errors. in 2012 IEEE Global Communications Conference, GLOBECOM 2012., 6503609, GLOBECOM - IEEE Global Telecommunications Conference, pp. 3214-3218, 2012 IEEE Global Communications Conference, GLOBECOM 2012, Anaheim, CA, United States, 12/12/3. https://doi.org/10.1109/GLOCOM.2012.6503609

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abstract = "The write-margin of the iterative decoding systems for the binary and non-binary low-density parity-check (LDPC) codes are studied in the magnetic recording system using a bit-patterned medium (BPM) R/W channel with write-errors caused by the write-head field gradient, the media switching field distribution (SFD), the magnetization fields from adjacent islands, and the island position deviation. The performances of iterative decoding systems using the binary and non-binary LDPC codes are evaluated by computer simulation at an areal recording density of 2 Tb/inch2. The results show that the non-binary LDPC coding and iterative decoding system improves the write-margin compared with the binary LDPC system. Furthermore it is clarified that in order to obtain the sufficient write-margin, it is important to suppress the influence of the demagnetization fields from adjacent islands.",

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Write-margin improvement of non-binary LDPC coding and iterative decoding system in BPM R/W channel with write-errors

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