METHOD AND SYSTEM FOR EQUALIZING RECEIVED SIGNAL IN OPTICAL COMMUNICATIONS SYSTEM
PROBLEM TO BE SOLVED: To equalize a received signal in an optical communications system. SOLUTION: The received signal is passed through an analog delay line 310 where it is tapped to generate a set of delayed copies of the received signal. In a set of analog multipliers 302, each delayed copy of th...
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| Zusammenfassung: | PROBLEM TO BE SOLVED: To equalize a received signal in an optical communications system. SOLUTION: The received signal is passed through an analog delay line 310 where it is tapped to generate a set of delayed copies of the received signal. In a set of analog multipliers 302, each delayed copy of the received signal is multiplied by a corresponding weight to generate a set of weighted signals that are then summed to produce an output signal. The output signal is thresholded and subtracted from the output signal to produce an error signal which is periodically sampled. In a digital weight updating circuit 350, the weights are produced from digitized versions of the sampled error signal and samples of the delayed copies of the received signal. COPYRIGHT: (C)2004,JPO |
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