We propose a blind feedforward phase noise mitigation method in the time-domain for a coherent
optical orthogonal frequency division multiplexing (CO-OFDM) systems. By exploiting the redundancy of the
cyclic prefix (CP), the proposed scheme acquires the overall phase noise difference information during an OFDM
block and attempts to mitigate the phase noise in the time domain using a linear approximation. The proposed
algorithm mitigates common phase error (CPE) and inter-carrier-interference (ICI) due to phase noise
simultaneously, improving the system performance, especially when decision-directed equalizers are used. The
simulation results demonstrate the effectiveness of the proposed feedforward phase noise mitigation approach
in time domain.
© 2013 Optical Society of Korea
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