Array heads for estimating track misregistration

Author

Barbosa, Lineu C. ; MacDonald, C. Eric ; Wolf, Jack K.

Author_Institution

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

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

4033

Lastpage

4035

Abstract

The authors examine the use of array heads for estimating the data and for providing servo information. A mathematical representation for array heads is developed, and a formula for the maximum likelihood estimate of the track misregistration is found. The case where the offtrack perturbation operator is dependent on the offtrack error is considered. This case requires a joint minimization of two branches of quadratic forms. Simulation results for a specific head configuration are given which validate the estimate and agree with the theoretical convergence rates. The estimate converges quickly enough for practical purposes in a real storage system

Keywords

magnetic heads; magnetic recording; maximum likelihood estimation; array heads; mathematical representation; maximum likelihood estimate; minimization; offtrack error; offtrack perturbation operator; quadratic forms; simulation; storage system; theoretical convergence rates; track misregistration; Convergence; Error analysis; Lifting equipment; Magnetic heads; Magnetic recording; Maximum likelihood estimation; Nonlinear optics; Optical pulses; Servomechanisms; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281380

Filename

281380