Equalization Enhanced Phase Noise in Coherent Receivers: DSP-Aware Analysis and Shaped Constellations

We revisit the analysis of equalization-enhanced phase noise (EEPN) arising from the interaction between the chromatic dispersion compensation by an electronic equalizer and the phase noise of the local oscillator. Through numerical simulations we highlight EEPN characteristics and investigate its impact on phase recovery algorithm. We show that taking into account EEPN characteristics is a key requirement to study the EEPN penalty in modern and future transoceanic systems using shaped constellations.