Patent ID: 8909061

Claim:
A method for performing chromatic dispersion (CD) pre-compensation, the method comprising: a transmitter generating a first electronic signal at the transmitter; using a transmit CD compensation estimate to compute a CD pre-compensation filter; using the transmit CD pre-compensation filter to process the first electronic signal; generating a pre-compensated first electronic signal; converting the pre-compensated first electronic signal into an optical signal; transmitting the optical signal to a first optical receiver via an optical channel at the first optical receiver; generating, based on the optical signal, a digital signal; sampling the digital signal at an initial sampling frequency F1; sampling the digital signal at a sampling frequency F2, lower in frequency than F1; supplying the resampled digital signal to a CD compensation filter, the CD compensated filter supplying a CD compensated signal at the F2 sampling frequency; resampling the CD compensated signal at a sampling frequency F3, greater than or equal to the F2 sampling frequency; and using an adaptive equalizer to process the CD compensated signal resampled at the sampling frequency F3 to estimate the first electronic signal.