Two-dimensional equalization/detection for patterned media storage

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Abstract

Although patterned media storage (PMS) is a promising candidate for ultrahigh-capacity magnetic data storage, as the capacity of PMS increases, the bit error rate (BER) performance of the system is degraded by increased two-dimensional intersymbol interference (2D-ISI), which results from intertrack interference (ITI), intersymbol interference (ISI), and noise. To improve the system performance under these adverse effects and to increase the capacity, in this paper, we propose to use and/or devise two-dimensional equalization/detection techniques: iterative decision feedback detection (IDFD) and two-dimensional generalized partial response equalization, which is optimized in minimum mean square error (MMSE), followed by one-dimensional Viterbi algorithm (2D-GPR/1D-VA). We evaluate the performance of the proposed methods by using numerical experiments under different amounts of 2D-ISI and noise. Simulation results suggest that under high storage density, the performance of the IDFD is improved by using more iterations and that under the same computational load, 2D-GPR/1D-VA performs better than IDFD. 2D-GPR/1D-VA, therefore, is a good candidate for ultrahigh-capacity PMS.

Available Versions of this Item

• Two-Dimensional Equalization/Detection for Patterned Media Storage. (deposited 28 Oct 2007 17:18)
  • Two-Dimensional Equalization/Detection for Patterned Media Storage. (deposited 18 Dec 2007 15:18)
    • Two-dimensional equalization/detection for patterned media storage. (deposited 19 Dec 2008 10:35)
      • Two-dimensional equalization/detection for patterned media storage. (deposited 22 Dec 2008 07:53) [Currently Displayed]