Effect of Bandpass Filters for TA Suppression in Perpendicular Recording System

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Published: Aug 1, 2009
DOI: https://doi.org/10.37936/ecti-eec.201081.172039
Keywords:
Bandpass Filter Perpendicular Recording Thermal Asperity

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Santi Koonkarnkhai
Department of Electrical Engineering, King Mongkuts University of Technology North Bangkok
Piya Kovintavewat
Data Storage Technology Research Unit, Nakhon Pathom Rajabhat University
Phongsak Keeratiwintakorn
Department of Electrical Engineering, King Mongkuts University of Technology North Bangkok,

Abstract

Thermal asperities (TAs) cause a crucial problem in magnetic recording systems because they can distort the readback signal to the extent of causing possible sector read failure. This problem becomes even more severe in perpendicular recording channels because these channels contain a d.c. component. This paper presents a novel TA suppression method by use of a bandpass ¯lter to mitigate the TA effect. We also investigate the effect of different bandpass filters for TA suppression. Results indicate that the proposed TA suppression method using a bandpass filter polynomial G(D) = (1+D)2(1-D) yields lower bit-error rate than the existing ones at the expense of increased complexity, and is also robust to large peak TA amplitudes.

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How to Cite
Koonkarnkhai, S., Kovintavewat, P., & Keeratiwintakorn, P. (2009). Effect of Bandpass Filters for TA Suppression in Perpendicular Recording System. ECTI Transactions on Electrical Engineering, Electronics, and Communications, 8(1), 93–98. https://doi.org/10.37936/ecti-eec.201081.172039
Issue
Vol. 8 No. 1 (2010): Special Session from ECTI-CON 2009
Section
Research Article

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