Performance of perpendicular magnetic recording with track squeeze using bidirectional pattern-dependent noise prediction detector

Performance of perpendicular magnetic recording with track squeeze using bidirectional pattern-dependent noise prediction detector
Title:
Performance of perpendicular magnetic recording with track squeeze using bidirectional pattern-dependent noise prediction detector
Other Titles:
Journal of Applied Physics
Keywords:
Publication Date:
18 March 2015
Citation:
J. Appl. Phys. 117, 17E315 (2015)
Abstract:
In this study, we investigated the performance of perpendicular magnetic recording with squeezed tracks. Based on spinstand signals, we developed a signal generation module to generate the readback signals for tracks of various squeezed track width and bit length. To mitigate the drop in bit error rate (BER) as squeezed track width decreases, we implemented the bidirectional patterndependent noise prediction (BiPDNP) detector with low-density parity check codes. To improve the BiPDNP detector over earlier work, we modified the log-likelihood ratio computation. Our results show that our proposed BiPDNP detector improves the bit error rate, and allows smaller squeezed track width and smaller bit length for the same BER performance.
License type:
PublisherCopyrights
Funding Info:
Description:
Copyright (2015) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 117, 17E315 (2015) and may be found at http://dx.doi.org/10.1063/1.4913899.
ISSN:
0021-8979
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