Study of Chromatic Dispersion Impacts on Kramers-Kronig and SSBI Iterative Cancellation Receiver

Abstract

Field recovery of single sideband signals with direct detection has recently been investigated for short-reach communications. One of the cruxes of such a direct-detected transmission system is signal-signal beat interference (SSBI) mitigation without sacrificing spectral efficiency. Among various digital signal processing schemes, the Kramers-Kronig (KK) algorithm has attracted considerable interest recently due to its effective mitigation of SSBI, and the phase of signals can be recovered using intensity information. As such, chromatic dispersion (CD) can be digitally compensated. Besides the KK algorithm, SSBI can also be sufficiently mitigated iteratively. In this letter, we carry out an..