The Rotating-Target Algorithm for Jointly Detecting Asynchronous Tracks

Elnaz Banan Sadeghian, John R. Barry

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Two-dimensional magnetic recording promises to increase areal density through the joint detection of multiple tracks of interest. This paper concerns the problem of joint detection of multiple tracks that are written asynchronously, meaning that neither the bit boundaries (phase) nor the bit rate (frequency) are aligned between neighboring tracks. We propose the rotating-target algorithm for jointly detecting multiple asynchronous tracks from one or more readback waveforms. The proposed approach is based on the joint Viterbi algorithm and a time-varying target that results when the asynchrony of the tracks is absorbed into the underlying target. Timing estimation for the tracks being detected is embedded inside the joint Viterbi detector using per-survivor processing. Performance results show that the proposed algorithm closely matches the performance of a fictitious system in which neighboring tracks are synchronous, and further that it significantly outperforms a previously reported detector that separately detects the two tracks.

Original languageEnglish
Pages (from-to)2463-2469
Number of pages7
JournalIEEE Journal on Selected Areas in Communications
Volume34
Issue number9
DOIs
StatePublished - Sep 2016

Keywords

  • Synchronization
  • intertrack interference (ITI)
  • multiple-input multiple-output (MIMO)
  • multitrack detection
  • per-survivor processing (PSP)
  • two-dimensional magnetic recording (TDMR)

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