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METHOD FOR OPTIMIZING DECISION LEVEL OF OUTPUT SIGNAL IN OPTICAL RECEIVER USING FEC AND OPTICAL RECEIVING SYSTEM USING THE SAME
METHOD FOR OPTIMIZING DECISION LEVEL OF OUTPUT SIGNAL IN OPTICAL RECEIVER USING FEC AND OPTICAL RECEIVING SYSTEM USING THE SAME
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机译:利用FEC优化光接收器输出信号决策水平的方法及使用该方法的光接收系统
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摘要
Optical signals transmitted through an optical cable are converted into digital data of bits "1" and "0" on the basis of a reference voltage, and errors generated during transmission of the optical signals are corrected using Forward Error Correction (FEC). A method includes extracting numbers of occurrence of errors for bits "1" and "0" recovered through the FEC. Thereafter, the extracted numbers of occurrence of errors for bits "1" and "0" are compared with each other. A reference voltage used to judge levels of the signals to be level "1" or "0" is controlled if the numbers of occurrence of errors for bits "1" and "0" are not equal to each other. The current reference voltage is maintained if the numbers of occurrence of errors for bits "1" and "0" are rendered equal to each other.
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