Ideas for detection in two-dimensional magnetic recording systems

Yao Wang, Sean Frohman, R. H. Victora

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


In two-dimensional magnetic recording, detection for a perfect writer and perfect reader based on an iterative threshold technique are compared to detection employing single threshold and adaptive threshold techniques. The simulation indicates that the algorithm can reach a BER of 9.3% compared to 11.2% and 10.5% for the latter cases when the bit size is 8 by 8 nm with a grain of 8.7 nm diameter. This increases data capacity by 11% to 6.6 TBits/inch 2. Additionally, detection with an array of three conventional heads has been studied: the simulation shows that for bits with dimension of 12 × 12 nm, grains of 8.7 nm diameter and reader width of 18 nm, the BER drops from 11.3% for a single conventional head to 5.4% for the head array with a two-dimensional generalized partial response equalizer at the optimum offset of 10 nm. The density is increased by 42%, reaching 4.0 Tbits/Inch 2.

Original languageEnglish (US)
Article number6332972
Pages (from-to)4582-4585
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number11
StatePublished - 2012

Bibliographical note

Funding Information:
This work was supported by National Science Foundation Contract No. ECCS-0925366. The authors thank F. Erden for useful discussion.


  • ECC media
  • Read head array
  • Two-dimensional equalization
  • Two-dimensional magnetic recording (TDMR)


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