Modifying Viterbi Algorithm to Mitigate Intertrack Interference in Bit-Patterned Media

Author

Nabavi, Sheida ; Kumar, B. V K Vijaya ; Zhu, Jian-Gang

Author_Institution

Electr. & Comput. Eng. Dept., Carnegie Mellon Univ., Pittsburgh, PA

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2274

Lastpage

2276

Abstract

Bit-patterned media are currently being investigated to obtain magnetic recording densities of 1 Tbit/in² and more. In bit-patterned media, the adjacent tracks may be as close as adjacent bits in a track resulting in significant intertrack interference (ITI). In this work, we propose a modified trellis for the Viterbi algorithm (VA) that can mitigate the effects of ITI. Simulation results show that the modified VA improves the bit error rate. Using a simple model for track misregistration (TMR), the performance of this modified VA in the presence of TMR is also investigated. Based on the simulation results, this modified VA also appears to be more tolerant to TMR than the conventional VA

Keywords

Viterbi decoding; error statistics; interference suppression; magnetic recording; Viterbi algorithm; bit error rate; bit-patterned media; intertrack interference mitigation; magnetic recording; track misregistration; Bit error rate; Data engineering; Data storage systems; Decision support systems; Intersymbol interference; Magnetic heads; Magnetic recording; Signal generators; Signal processing; Viterbi algorithm; Bit-patterned media; Viterbi algorithm (VA); intertrack interference;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.893479

Filename

4202854