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Judgment level setting method and data receiver

  • US 7,042,965 B2
  • Filed: 10/05/2001
  • Issued: 05/09/2006
  • Est. Priority Date: 10/05/2000
  • Status: Expired due to Fees
First Claim
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1. An evaluation level setting method to be employed in a data reception apparatus which receives a signal in which one or more bits of data is assigned as one data symbol to a signal level, said evaluation level setting method comprising:

  • receiving an initialization pattern signal which is outputted from a data transmission apparatus, at turn-on of power or immediately after reset;

    establishing clock synchronization based on the initialization pattern signal, and setting evaluation levels with which signal levels are subjected to threshold evaluation;

    calculating ideal values of the respective signal levels based on the evaluation levels which are set according to the initialization pattern signal, and holding the ideal values; and

    adjusting a gain of a received signal based on a difference between a signal level of the received signal and an ideal value of the signal level, thereby to correct variations in the received signal.

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