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Using a measured error to determine coefficients to provide to an equalizer to use to equalize an input signal

  • US 20070133115A1
  • Filed: 12/08/2005
  • Published: 06/14/2007
  • Est. Priority Date: 12/08/2005
  • Status: Active Grant
First Claim
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1. A read channel incorporated in a storage device to process signals read from a storage medium, comprising:

  • an equalizer using coefficients to equalize input read signals to produce equalizer output signals;

    a detector processing adjusted equalizer output signals to determine output values comprising data represented by the input read signals; and

    an equalizer adaptor enabled to perform operations comprising;

    providing a reference measured error and coefficients used to produce the adjusted equalizer signals that are associated with the reference measured error;

    computing new equalizer coefficients to use to equalize input read signals that result in a new measured error from the detector;

    computing a new measured error for-the new equalizer coefficients;

    determining whether the new measured error is degraded with respect to the reference measured error;

    saving the new equalizer coefficients and the new measured error in response to determining that the new measured error is not degraded with respect to the reference measured error; and

    . providing the equalizer coefficients associated with the reference measured error to the equalizer to use to equalize input read signals in response to determining that the new measured error is degraded with respect to the reference measured error.

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