Soft-error-event decoding for multitrack magnetic recording channels

Bane Vasic; Vijay Venkateswaran

doi:10.1109/TMAG.2004.824135

Soft-error-event decoding for multitrack magnetic recording channels

Bane Vasic
, Vijay Venkateswaran

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

6 Scopus citations

Abstract

Multiple-head array systems, which allow reading and writing of data simultaneously on multiple tracks, can potentially provide both high density and high speed, but the read-back signal in such systems is corrupted by intertrack interference (ITI) in addition to intersymbol interference (ISI). In this paper, we report on the performance of a multitrack system and propose a low-complexity multitrack soft-error-event decoder (SEED) to counter the effects of ISI and ITI. The multitrack SEED is based on a high-rate Bose-Chaudhuri-Hocquenghem code, and is capable of correcting most frequent error events produced by the channel. Used in conjunction with a joint partial response equalizer followed by an ITI equalizer, the SEED scheme provides a gain of 0.5-2 dB at a bit-error rate of 10^-4 relative to an uncoded system.

Original language	English (US)
Pages (from-to)	492-497
Number of pages	6
Journal	IEEE Transactions on Magnetics
Volume	40
Issue number	2 I
DOIs	https://doi.org/10.1109/TMAG.2004.824135
State	Published - Mar 2004

Keywords

Error-event decoding
Intersymbol interference (ISI)
Intertrack interference (ITI)
Joint partial response equalization
Maximum likelihood sequence detection
Parity check codes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2004.824135

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abstract = "Multiple-head array systems, which allow reading and writing of data simultaneously on multiple tracks, can potentially provide both high density and high speed, but the read-back signal in such systems is corrupted by intertrack interference (ITI) in addition to intersymbol interference (ISI). In this paper, we report on the performance of a multitrack system and propose a low-complexity multitrack soft-error-event decoder (SEED) to counter the effects of ISI and ITI. The multitrack SEED is based on a high-rate Bose-Chaudhuri-Hocquenghem code, and is capable of correcting most frequent error events produced by the channel. Used in conjunction with a joint partial response equalizer followed by an ITI equalizer, the SEED scheme provides a gain of 0.5-2 dB at a bit-error rate of 10-4 relative to an uncoded system.",

keywords = "Error-event decoding, Intersymbol interference (ISI), Intertrack interference (ITI), Joint partial response equalization, Maximum likelihood sequence detection, Parity check codes",

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note = "Funding Information: Manuscript received February 27, 2003; revised October 3, 2003. This work was supported by the National Science Foundation under Grant CCR 0208597. B. Vasic is with the Department of Electrical and Computer Engineering, University of Arizona, Tucson, AZ 85721 USA (e-mail: [email protected]). V. Venkateswaran was with the Department of Electrical and Computer Engineering, University of Arizona, Tucson, AZ 85721 USA. He is now with the Storage and Architecture Development Department, Sony Corporation, Tokyo 141-0001, Japan. Digital Object Identifier 10.1109/TMAG.2004.824135",

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AB - Multiple-head array systems, which allow reading and writing of data simultaneously on multiple tracks, can potentially provide both high density and high speed, but the read-back signal in such systems is corrupted by intertrack interference (ITI) in addition to intersymbol interference (ISI). In this paper, we report on the performance of a multitrack system and propose a low-complexity multitrack soft-error-event decoder (SEED) to counter the effects of ISI and ITI. The multitrack SEED is based on a high-rate Bose-Chaudhuri-Hocquenghem code, and is capable of correcting most frequent error events produced by the channel. Used in conjunction with a joint partial response equalizer followed by an ITI equalizer, the SEED scheme provides a gain of 0.5-2 dB at a bit-error rate of 10-4 relative to an uncoded system.

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KW - Joint partial response equalization

KW - Maximum likelihood sequence detection

KW - Parity check codes

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Soft-error-event decoding for multitrack magnetic recording channels

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Keywords

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