A Parametric Study of Inter-Track Interference in Bit Patterned Media Recording

Author

Karakulak, Seyhan ; Siegel, Paul H. ; Wolf, Jack Keil

Author_Institution

Center for Magn. Recording Res., Univ. of California San Diego, La Jolla, CA, USA

Volume

46

Issue

3

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

819

Lastpage

824

Abstract

We present a parametric study of inter-track interference (ITI) in the context of bit patterned media (BPM) recording channels. Bit error rate (BER) simulation results for optimal bit detection at moderate-to-high signal-to-noise-ratio (SNR) show that, in a certain range of ITI levels, increased ITI does not necessarily degrade performance. This observation applies to channels both with and without intersymbol interference (ISI) as well as in the absence and presence of track misregistration (TMR). In the case of no ISI, an exact analysis of the BER performance of optimal bit detection provides a complete explanation of the observed effect of ITI. For channels with ISI, error event analysis of a joint-track maximum-likelihood sequence detector provides insight into the observed impact of varying levels of ITI on BER performance.

Keywords

error statistics; intersymbol interference; magnetic recording; maximum likelihood sequence estimation; BER; SNR; bit error rate; bit patterned media; error event analysis; inter-track interference; intersymbol interference; maximum-likelihood sequence detector; media recording; signal-to-noise-ratio; track misregistration; Bit error rate; Degradation; Detectors; Error analysis; Event detection; Intersymbol interference; Maximum likelihood detection; Parametric study; Performance analysis; Signal to noise ratio; Bit patterned media (BPM) recording; inter-track interference (ITI); intersymbol interference (ISI); track misregistration (TMR);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2037724

Filename

5415773