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Method and apparatus for reducing interference in an optical data stream using data-independent equalization

  • US 6,956,917 B2
  • Filed: 04/17/2003
  • Issued: 10/18/2005
  • Est. Priority Date: 04/17/2003
  • Status: Expired due to Term
First Claim
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1. A method for reducing interference in an optical data stream received over a channel, the method comprising:

  • receiving an electrical signal derived from the optical data stream;

    computing a plurality of time-correlation statistics from the electrical signal that reduce data components of the electrical signal;

    estimating, at least in part from the plurality of time-correlation statistics, a channel response that contains dispersion information for the channel;

    calculating, at least in part from the channel response, a set of filter coefficients for an adaptive equalizer;

    filtering the electrical signal using the set of filter coefficients to create a filtered signal; and

    comparing the filtered signal to a threshold value to generate a plurality of data values for the optical data stream.

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