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Equalization method utilizing a delay circuit

  • US 5,295,157 A
  • Filed: 05/27/1992
  • Issued: 03/15/1994
  • Est. Priority Date: 06/04/1991
  • Status: Expired due to Fees
First Claim
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1. An equalization method for supplying an input signal composed of a predetermined total number of symbols to a series circuit of plural delay means, multiplying the input signal and delayed output signals from the delay means by coefficients, and adding the products into an equalized output signal, said equalization method comprising the steps of:

  • supplying the input signal to the series circuit;

    transmitting the input signal in a first direction through a predetermined number of delay means corresponding to a unit number of symbols which is smaller than said predetermined total number of symbols to delay the input signal successively with the delay means;

    transmitting again the input signal in a second direction opposite to the first direction through said predetermined number of delay means to delay the input signal successively with the delay means;

    transmitting again the input signal in the first direction through said predetermined number of delay means to delay the input signal successively with the delay means;

    detecting an amplitude error of the equalized output signal each time the input signal is transmitted in the series circuit in the first direction or second direction; and

    calculating said coefficients multiplied with the input signal and the delayed output signals from the respective delay means according to the detected amplitude error whereby the amplitude error is minimized.

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