Signal Processing and Coding Techniques for 2-D Magnetic Recording: An Overview

Shayan Srinivasa Garani, Lara Dolecek, John Barry, Frederic Sala, Bane Vasic

Research output: Contribution to journalReview article

8 Scopus citations

Abstract

Two-dimensional magnetic recording (TDMR) is an emerging storage technology that aims to achieve areal densities on the order of 10 Tb/in2, mainly driven by innovative channels engineering with minimal changes to existing head/media designs within a systems framework. Significant additive areal density gains can be achieved by using TDMR over bit patterned media (BPM) and energy-assisted magnetic recording (EAMR). In TDMR, the sectors are inherently 2-D with reduced track pitch and bit widths, leading to severe 2-D intersymbol interference (ISI). This necessitates the development of powerful 2-D signal processing and coding algorithms for mitigating 2-D ISI, timing artifacts, jitter, and electronics noise resulting from irregular media grain positions and read-head electronics. The algorithms have to be eventually realized within a read/write channel architecture as a part of a system-on-chip (SoC) within the disk controller system. In this work, we provide a wide overview of TDMR technology, channel models and capacity, signal processing algorithms (detection and timing recovery), and error-correcting codes attuned to 2-D channels. The innovations and advances described not only make TDMR a promising future technology, but may serve a broader engineering audience as well.

Original languageEnglish (US)
Article number8290590
Pages (from-to)286-318
Number of pages33
JournalProceedings of the IEEE
Volume106
Issue number2
DOIs
StatePublished - Feb 2018

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Keywords

  • 2-D intersymbol interference channels
  • 2-D signal processing
  • coding techniques
  • magnetic storage
  • read write channels
  • systems architecture

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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