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

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


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 languageEnglish (US)
Article number7109973
JournalIEEE Transactions on Magnetics
Issue number4
StatePublished - Apr 1 2015

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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