A Study of TDMR signal processing opportunities based on quasi-micromagnetic simulations

Bane Vasic; Mehrdad Khatami; Yasuaki Nakamura; Yoshihiro Okamoto; Yasushi Kanai; John R. Barry; Steven W. McLaughlin; Elnaz Banan Sadeghian

doi:10.1109/TMAG.2014.2356455

A Study of TDMR signal processing opportunities based on quasi-micromagnetic simulations

Bane Vasic
, Mehrdad Khatami
, Yasuaki Nakamura
, Yoshihiro Okamoto
, Yasushi Kanai
, John R. Barry
, Steven W. McLaughlin
, Elnaz Banan Sadeghian

Department of Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

This paper presents the results of a comprehensive study of the shingled writing process and various signal processing and data detection approaches applied to the readback waveforms. The recording simulations include realistic head fields, a random granular media, magnetostatic and exchange interactions, and a READ head sensitivity function. Readback waveforms are examined in both one and two dimensions in terms of signal characteristics (linear and nonlinear), noise behavior (stationary and signal-dependent), and intertrack interference. Different equalization and detection approaches are compared and about a 10% density gain is reported for such 2-D magnetic recording compared with traditional single-track recording. These gains depend strongly on the number of readers, the reader positioning, and the reader width.

Original language	English
Article number	7109973
Journal	IEEE Transactions on Magnetics
Volume	51
Issue number	4
DOIs	https://doi.org/10.1109/TMAG.2014.2356455
State	Published - 1 Apr 2015

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10.1109/TMAG.2014.2356455

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abstract = "This paper presents the results of a comprehensive study of the shingled writing process and various signal processing and data detection approaches applied to the readback waveforms. The recording simulations include realistic head fields, a random granular media, magnetostatic and exchange interactions, and a READ head sensitivity function. Readback waveforms are examined in both one and two dimensions in terms of signal characteristics (linear and nonlinear), noise behavior (stationary and signal-dependent), and intertrack interference. Different equalization and detection approaches are compared and about a 10\% density gain is reported for such 2-D magnetic recording compared with traditional single-track recording. These gains depend strongly on the number of readers, the reader positioning, and the reader width.",

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AU - Vasic, Bane

AU - Khatami, Mehrdad

AU - Nakamura, Yasuaki

AU - Okamoto, Yoshihiro

AU - Kanai, Yasushi

AU - Barry, John R.

AU - McLaughlin, Steven W.

AU - Sadeghian, Elnaz Banan

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N2 - This paper presents the results of a comprehensive study of the shingled writing process and various signal processing and data detection approaches applied to the readback waveforms. The recording simulations include realistic head fields, a random granular media, magnetostatic and exchange interactions, and a READ head sensitivity function. Readback waveforms are examined in both one and two dimensions in terms of signal characteristics (linear and nonlinear), noise behavior (stationary and signal-dependent), and intertrack interference. Different equalization and detection approaches are compared and about a 10% density gain is reported for such 2-D magnetic recording compared with traditional single-track recording. These gains depend strongly on the number of readers, the reader positioning, and the reader width.

AB - This paper presents the results of a comprehensive study of the shingled writing process and various signal processing and data detection approaches applied to the readback waveforms. The recording simulations include realistic head fields, a random granular media, magnetostatic and exchange interactions, and a READ head sensitivity function. Readback waveforms are examined in both one and two dimensions in terms of signal characteristics (linear and nonlinear), noise behavior (stationary and signal-dependent), and intertrack interference. Different equalization and detection approaches are compared and about a 10% density gain is reported for such 2-D magnetic recording compared with traditional single-track recording. These gains depend strongly on the number of readers, the reader positioning, and the reader width.

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A Study of TDMR signal processing opportunities based on quasi-micromagnetic simulations

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