Referenced Items are not available for this document.
Off-track condition in magnetic recording systems degrades the system performance. It is typically detected and adjusted by the servo control loop. In this work, we propose an off-track detection based on the readback signals and improve the bit error performance using an asymmetric target depending on the detected off-track direction. Specifically, we investigate the effects of off-track events on the target-shaping equalizer coefficients when the generalized partial-response target (GPR) is fixed. For a 3 × 3 channel matrix of bit patterned media recording (BPMR) system, the asymmetric targets offer the gain of about 1 to 2 dB at BER=10-4 for the TMR level of 20% to 25%.
Published in:
Magnetics, IEEE Transactions on
(Volume:48
,
Issue:
11
)
Date of Publication: Nov. 2012
- Page(s):
- 4590 - 4593
- ISSN :
- 0018-9464
- INSPEC Accession Number:
- 13056812
- Digital Object Identifier :
- 10.1109/TMAG.2012.2204963
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 18 October 2012
- Issue Date :
- Nov. 2012
- Sponsored by :
- IEEE Magnetics Society
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