| 摘要 |
The present disclosure relates to a method for estimating chromatic dispersion of a received optical signal (Rx(f)), the method comprising: scanning the received optical signal (Rx(f)) through a number (M) of chromatic dispersion compensation filters in a chromatic dispersion filter range (Dmin . . . Dmax) between a first chromatic dispersion value (Dmin) and a second chromatic dispersion value (Dmax) with a resolution (DeltaD) determined by the chromatic dispersion filter range (Dmin . . . Dmax) normalized by the number (M) of chromatic dispersion compensation filters to obtain filtered samples (Rx, D(f)) of the received optical signal (Rx(f)); and determining a correlation function (CD(tau,B)) indicating an estimate of the chromatic dispersion by correlating the filtered samples (Rx, D(f)) of the received optical signal (Rx(f)) with respect to frequency shifts (tau) over a correlation bandwidth (B), wherein the correlation bandwidth (B), the chromatic dispersion filter range (Dmin . . . Dmax) and the resolution (DeltaD) are iteratively adapted according to an optimization criterion.
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