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A Simple Inter-Track Interference Subtraction Technique in Bit-Patterned Media Recording (BPMR) Systems

Chaiwat BUAJONG, Chanon WARISARN

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Summary :

In this paper, we demonstrate how to subtract the intertrack interference (ITI) before the decoding process in multi-track multi-head bit-patterned media recording (BPMR) system, which can obtain a better bit error rate (BER) performance. We focus on the three-track/three-head BPMR channel and propose the ITI subtraction technique that performs together with a rate-5/6 two dimensional (2D) modulation code. Since the coded system can provide the estimated recorded bit sequence with a high reliability rate for the center track. However, the upper and lower data sequences still be interfered with their sidetracks, which results to have a low reliability rate. Therefore, we propose to feedback the data from the center and upper tracks for subtracting the ITI effect of the lower track. Meanwhile, the feedback data from the center and lower tracks will be also used to subtract the ITI effect of the upper track. The use of our proposed technique can effectively reduce the severity of ITI effect which caused from the two sidetracks. The computer simulation results in the presence of position and size fluctuations show that the proposed system yields better BER performance than a conventional coded system, especially when an areal density (AD) is ultra high.

Publication
IEICE TRANSACTIONS on Electronics Vol.E101-C No.5 pp.404-408
Publication Date
2018/05/01
Publicized
Online ISSN
1745-1353
DOI
10.1587/transele.E101.C.404
Type of Manuscript
PAPER
Category
Storage Technology

Authors

Chaiwat BUAJONG
  King Mongkut's Institute of Technology Ladkrabang
Chanon WARISARN
  King Mongkut's Institute of Technology Ladkrabang

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