Multi-channel equalization for PWM channels in magneto-optical recording

Author

Gopalaswamy, Srinivasan ; Kumar, B. V K Vijaya

Author_Institution

Data Storage Inst., NUS, Singapore

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3265

Lastpage

3267

Abstract

We show by modeling and simulations that multitrack readback and equalization can lead to significant increases in the track density in magneto-optical recording without performance degradation due to two dimensional interference. We assume an architecture in which an isolated set of closely spaced tracks is read simultaneously. In an earlier paper, we described a multi-channel zero-forcing equalizer and a two-dimensional decision-feedback equalizer for this architecture, and presented their performance for PPM (pulse position modulation) optical recording channels. Since PWM (pulse width modulation) recording is more popular in magneto-optic (MO) disks, we model the PWM channel in this paper and show simulation results for the performance improvement obtained by using multi-channel equalization for data recorded in PWM format

Keywords

crosstalk; decision feedback equalisers; intersymbol interference; magnetic recording noise; magneto-optical recording; modelling; pulse width modulation; simulation; PWM channels; closely spaced tracks; inter-track interference; magneto-optic disks; magneto-optical recording; modeling; multi-channel equalization; multi-channel zero-forcing equalizer; multitrack readback; nonlinear decision feedback; performance improvement; simulation; track density; two dimensional interference; two-dimensional decision-feedback equalizer; Decision feedback equalizers; Degradation; Interference; Magnetic modulators; Magnetooptic recording; Optical modulation; Optical pulses; Optical recording; Pulse width modulation; Space vector pulse width modulation;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617912

Filename

617912