LDPC product coding scheme with extrinsic information for bit patterned media recoding

Since the density limit of the current perpendicular magnetic storage system will soon be reached, bit patterned media recording (BPMR) is a promising candidate for the next generation storage system to achieve an areal density beyond 1 Tb/in2. Each recording bit is stored in a fabricated magnetic i...

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Veröffentlicht in:	AIP advances Jg. 7; H. 5; S. 056513 - 056513-4
Hauptverfasser:	Jeong, Seongkwon, Lee, Jaejin
Format:	Journal Article
Sprache:	Englisch
Veröffentlicht:	AIP Publishing LLC 01.05.2017
ISSN:	2158-3226, 2158-3226
Online-Zugang:	Volltext
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Zusammenfassung:	Since the density limit of the current perpendicular magnetic storage system will soon be reached, bit patterned media recording (BPMR) is a promising candidate for the next generation storage system to achieve an areal density beyond 1 Tb/in2. Each recording bit is stored in a fabricated magnetic island and the space between the magnetic islands is nonmagnetic in BPMR. To approach recording densities of 1 Tb/in2, the spacing of the magnetic islands must be less than 25 nm. Consequently, severe inter-symbol interference (ISI) and inter-track interference (ITI) occur. ITI and ISI degrade the performance of BPMR. In this paper, we propose a low-density parity check (LDPC) product coding scheme that exploits extrinsic information for BPMR. This scheme shows an improved bit error rate performance compared to that in which one LDPC code is used.
ISSN:	2158-3226 2158-3226
DOI:	10.1063/1.4978219