Patent ID: 8472814

Claim:
An apparatus for equalizing chromatic dispersion, comprising: a chromatic dispersion equalizing unit, for compensating chromatic dispersion of an input signal; and an additional time delay removing unit, for removing, in accordance with frequency offset of the input signal, chromatic dispersion equalization time delay generated by the chromatic dispersion equalizing unit, wherein: the chromatic dispersion equalizing unit includes a first time domain equalizer and a second time domain equalizer; and the additional time delay removing unit includes a time domain equalizer coefficient storing unit and a time domain equalizer coefficient correcting unit, of which the time domain equalizer coefficient storing unit stores time domain equalizer coefficients used by the first time domain equalizer and the second time domain equalizer when the frequency offset is supposed to be zero, and the time domain equalizer coefficient correcting unit corrects, in accordance with the frequency offset, the time domain equalizer coefficients and transmits the corrected time domain equalizer coefficients to the first time domain equalizer and the second time domain equalizer.