Experimental Demonstration of A Low-Complexity Phase Noise Compensation for CO-OFDM Systems

IEEE In this letter, a low-complexity phase noise compensation scheme based on Kalman filtering theory is experimentally demonstrated for coherent optical orthogonal frequency division multiplexing (CO-OFDM) transmissions. The proposed scheme can operate in two modes, pilot-aided mode and blind mode, resulting in a variety of phase noise tracking configurations upon particular transmission scenario. At a bit-error-rate of 3.8 × 10-3 and for 40 GBaud 16QAM 64 subcarriers CO-OFDM systems, the proposed method operating in the pilot-aided mode reduces the pilot overhead by a factor of two in comparison with the conventional pilot-aided scheme, while in the blind mode, our scheme’s complexity is far superior to one of the state-of-the-art computational efficient decision-direct-free blind approach by a factor of twenty.