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Digital signal receiving apparatus, an optical transmission apparatus therewith, and a discriminating point control method

  • US 20050149791A1
  • Filed: 12/29/2004
  • Published: 07/07/2005
  • Est. Priority Date: 12/05/2002
  • Status: Abandoned Application
First Claim
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1. A digital signal receiving apparatus, comprising:

  • a receiving signal discriminating unit;

    an error monitoring unit configured to monitor a discriminating error of the receiving signal discriminating unit; and

    a discriminating point control unit configured to control a discriminating point of the receiving signal discriminating unit, wherein the discriminating point control unit monitors an output of the error monitoring unit, moves the discriminating point of the receiving signal discriminating unit in the amplitude directions and the phase directions such that an error occurs, detects a central point of discriminating points that generate bit errors, and sets the central point of the discriminating points as the discriminating point of the receiving signal discriminating unit.

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