Cyclic Prefix-aided Linear Trajectory Search for Phase-Noise Mitigation in CO-OFDM Systems

What is it about?

Orthogonal frequency-division multiplexing (OFDM) is advantageous in communications systems because it provides high spectral efficiency and simple channel equalization using orthogonality between the subcarriers. However, phase noise, caused by imperfections in the transceiver hardware, often destroys this orthogonality between the subcarriers and degrades the system performance. This paper proposes a method to estimate and mitigate the phase-noise in coherent optical orthogonal frequency-division multiplexing (CO-OFDM) systems. It modifies the existing method proposed by Negusse et al, and achieves better performance of phase-noise mitigation with reduced computational complexity.

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