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Adaptive Pre/Post-Compensation of Cascade Filters in Coherent Optical Transponders
2020
Future Internet
We propose an adaptive joint pre- and post- compensation to correct the filtering effects caused by cascading reconfigurable optical add drop multiplexers (ROADMs). The improvement is achieved without using additional hardware (HW) on the link or within the signal processor in the transponders. Using Monte Carlo simulations, the gradient-descent based method shows an improvement of 0.6 dB and 1.1 dB in the required optical signal-to-noise ratio (R-OSNR) at the threshold pre-decoder bit error
doi:10.3390/fi12020021
fatcat:zqxj25lqz5e6lf7lo4mobjuloa