Optical signal equalizer with adjustable linear filter
A filter and signal conditioner technology, applied in the field of signal transmission, can solve the problem of unreadable electronic signals
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[0018] Embodiments of the present invention compensate for dispersion-related effects caused by communication channels. Embodiments pass the signal traveling on the channel through a linear filter. Linear filters are designed to counteract dispersion-related effects. These embodiments calculate a figure of merit for the signal output from the linear filter. The figure of merit may be a function of the second and fourth moments of the output. Based on the value of the figure of merit, the coefficients of the linear filter can be adjusted in order to improve the performance of the linear filter.
[0019] An example of optical signal dispersion is shown in FIG. 1 , which schematically illustrates a fiber optic communication path 100 . The data signal b(t) propagates through the transmitter 104 onto the fiber optic cable 102 . As the data signal b(t) propagates onto the fiber optic cable 102, the transition between high and low logic bits is steep. As the data signal b(t) tra...
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