Optical communications – Diagnostic testing – Determination of communication parameter
Reexamination Certificate
2007-05-01
2007-05-01
Singh, Dalzid (Department: 2613)
Optical communications
Diagnostic testing
Determination of communication parameter
C398S025000, C398S017000, C398S202000
Reexamination Certificate
active
10436909
ABSTRACT:
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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Ko Je Soo
Lee Jyung Chan
Myong Seung Il
Blakely & Sokoloff, Taylor & Zafman
Electronics and Telecommunications Research Institute
Singh Dalzid
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