Turbo equalization effect for nonbinary LDPC code in BPM R/W channel

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

doi:10.1109/TMAG.2012.2194989

Turbo equalization effect for nonbinary LDPC code in BPM R/W channel

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

Broadband Engineering Division

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

It is expected for the nonbinary low-density parity-check (LDPC) coding and iterative decoding system to introduce the turbo equalization in order to enhance the error correction ability in the bit-patterned medium (BPM) R/W channel. In this paper, we investigate the effect of the turbo equalization on the bit-error rate (BER) performance of nonbinary LDPC coding and iterative decoding system over Galois filed GF(2 ⁸) in BPM R/W channel with write-error at an areal recording density of 2 Tbit/inch ² considering the coding rate loss. The performance of turbo equalization using the nonbinary LDPC coding and iterative decoding system is evaluated by computer simulation, and it is compared to that without turbo equalization. The results show that the nonbinary LDPC and iterative decoding system with the turbo equalization has the larger write-margin compared to that without turbo equalization.

Original language	English
Article number	6332861
Pages (from-to)	4602-4605
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	48
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2012.2194989
Publication status	Published - 2012

Keywords

Bit-patterned media (BPM)
Nonbinary low-density parity-check (LDPC) code
Turbo equalization

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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title = "Turbo equalization effect for nonbinary LDPC code in BPM R/W channel",

abstract = "It is expected for the nonbinary low-density parity-check (LDPC) coding and iterative decoding system to introduce the turbo equalization in order to enhance the error correction ability in the bit-patterned medium (BPM) R/W channel. In this paper, we investigate the effect of the turbo equalization on the bit-error rate (BER) performance of nonbinary LDPC coding and iterative decoding system over Galois filed GF(2 8) in BPM R/W channel with write-error at an areal recording density of 2 Tbit/inch 2 considering the coding rate loss. The performance of turbo equalization using the nonbinary LDPC coding and iterative decoding system is evaluated by computer simulation, and it is compared to that without turbo equalization. The results show that the nonbinary LDPC and iterative decoding system with the turbo equalization has the larger write-margin compared to that without turbo equalization.",

keywords = "Bit-patterned media (BPM), Nonbinary low-density parity-check (LDPC) code, Turbo equalization",

author = "Yasuaki Nakamura and Yasuhisa Bandai and Yoshihiro Okamoto and Hisashi Osawa and Hajime Aoi and Hiroaki Muraoka",

note = "Funding Information: ACKNOWLEDGMENT The authors would like to thank Associate Prof. S. Greaves of Tohoku University, Assistant Prof. K. Miura of Tohoku University, and Prof. Y. Kanai of Niigata Institute of Technology for their helpful discussions. This work was supported in part by the Storage Research Consortium (SRC), Japan, under Grants-in-Aid and in part by the Japan Society for the Promotion of Science (JSPS) under Gants-in-Aid for Scientific Research (B) 21360188 and (C) 2360457.",

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AU - Bandai, Yasuhisa

AU - Okamoto, Yoshihiro

AU - Osawa, Hisashi

AU - Aoi, Hajime

AU - Muraoka, Hiroaki

N1 - Funding Information: ACKNOWLEDGMENT The authors would like to thank Associate Prof. S. Greaves of Tohoku University, Assistant Prof. K. Miura of Tohoku University, and Prof. Y. Kanai of Niigata Institute of Technology for their helpful discussions. This work was supported in part by the Storage Research Consortium (SRC), Japan, under Grants-in-Aid and in part by the Japan Society for the Promotion of Science (JSPS) under Gants-in-Aid for Scientific Research (B) 21360188 and (C) 2360457.

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N2 - It is expected for the nonbinary low-density parity-check (LDPC) coding and iterative decoding system to introduce the turbo equalization in order to enhance the error correction ability in the bit-patterned medium (BPM) R/W channel. In this paper, we investigate the effect of the turbo equalization on the bit-error rate (BER) performance of nonbinary LDPC coding and iterative decoding system over Galois filed GF(2 8) in BPM R/W channel with write-error at an areal recording density of 2 Tbit/inch 2 considering the coding rate loss. The performance of turbo equalization using the nonbinary LDPC coding and iterative decoding system is evaluated by computer simulation, and it is compared to that without turbo equalization. The results show that the nonbinary LDPC and iterative decoding system with the turbo equalization has the larger write-margin compared to that without turbo equalization.

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