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System and method for the non-linear adjustment of compensation applied to a signal

  • US 7,839,955 B2
  • Filed: 05/24/2007
  • Issued: 11/23/2010
  • Est. Priority Date: 05/30/2006
  • Status: Active Grant
First Claim
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1. A method for adjusting a signal, comprising:

  • using an equalizer, applying loss compensation for frequency-dependent distortion to a signal before or after the distortion occurs to generate an output signal;

    using a clock signal, sampling the output signal using a sampler to generate a plurality of data values and boundary values, each data value and boundary value comprising either a high value or a low value based on the sampling of the output signal; and

    based only on the high or low values of one or more of the data values and boundary values, adjusting the loss compensation applied to the signal using a controller, wherein;

    if the loss compensation applied to the signal is to be increased, the loss compensation is increased by a first amount;

    if the loss compensation applied to the signal is to be decreased, the loss compensation is decreased by a second amount;

    the magnitude of the first amount is not equal to the magnitude of the second amount;

    the first amount and the second amount are associated with a control target value; and

    the control target value is adjusted dynamically based on the value of the loss compensation applied to the signal.

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