Analysis of Nonlinear Interference in CO-OFDM/OQAM Systems Based Volterra Series

Orthogonal frequency-division multiplexing offset-quadrature amplitude modulation (OFDM/OQAM) removes the cyclic prefix (CP) inserted to increases the system spectral efficiency. In OFDM/OQAM systems, the inter-symbol interference (ISI), the inter-carrier-interference (ICI) and intrinsic imaginary interference (IMI) could be combated by using the filter banks with good time-frequency localization (TFL) property when the system suffering the chromatic dispersion (CD), polarization mode dispersion (PMD), phase noise (PN). During the transmission of fiber channel the signal is always affected by Kerr effect in optical which is an important impairment induces the self-phase modulation (SPM) and cross-phase modulation (XPM) and can be expressed as Volterra series method. In this paper, we systematically analyze the Nonlinear Interference in CO-OFDM/OQAM systems based on Volterra series for the first time. We mainly analyze the impact of the transmission distance, transmission rate and the amount of data transferred in nonlinear COOFDM/ OQAM systems. Simulation analysis shows that nonlinear robustness for CO-OFDM/OQAM system get better with the decrease of the transmission distance, transmission rate and the amount of data transferred.