Relationship Between Equalized SNR and Jitter—Theory and Application to PMR and HAMR

Author

Valcu, Bogdan F. ; Gee, Harold ; Alex, Michael ; Champion, Eric

Author_Institution

Western Digital, San Jose, CA, USA

Volume

50

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

1

Lastpage

4

Abstract

A simple analytical relationship between equalized signal-to-noise ratio (SNR) and jitter is derived theoretically. Equalization is applied to the spectra of pseudorandom sequence signals, by whitening the frequency content of the noise. Jitter is evaluated in the frequency domain with square waveform signals. We verify experimentally that, for a wide range of linear densities, we can predict well-equalized SNR (and thus overall system performance) by using the measured jitter value.

Keywords

equalisers; frequency-domain analysis; jitter; magnetic recording; random sequences; waveform analysis; HAMR; PMR; equalized SNR; equalized signal-to-noise ratio; frequency domain analysis; heat-assisted magnetic recording; jitter value measurement; perpendicular magnetic recording; pseudorandom sequence signal spectra; square waveform signal; Frequency measurement; Heat-assisted magnetic recording; Jitter; Media; Signal to noise ratio; Vectors; Equalization; jitter; noise whitening; pseudorandom sequence (PRS);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2319215

Filename

6971811