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Preamble Based Frequency Domain Channel Estimation Method for Polarization-Division-Multiplexed CO-OFDM/OQAM System

In this paper, we analyzed the frequency-domain optical fiber channel transmission model for PDM CO-OFDM/OQAM systems with the IMI effect induced CD, PMD and nonlinear. The full loaded (FL) and the half loaded (HL) frequency-domain methods were compared to discuss the IMI effect in linear and nonlinear channels. The robustness against CD, PMD and nonlinear phase noise were also compared for both of the FL and the HL methods. The theoretical analysis is validated by numerical Monte Carlo simulations of PDM CO-OFDM/OQAM systems.