Guowei Yang, Weisheng Ye, Meihua Bi, Xuyang Teng, Ran Zeng, Miao Hu. Common Phase Error Compensation in Coherent Optical OFDM System with Two-Dimensional Projection Histogram-Based and Pilot-Aided Method[J]. Acta Optica Sinica, 2019, 39(11): 1106001
- Acta Optica Sinica
- Vol. 39, Issue 11, 1106001 (2019)
Fig. 1. Schematic of CO-OFDM system
Fig. 2. Schematic of pilot insertion
Fig. 3. Schematic of two-dimensional projection histogram in 16-QAM constellation
Fig. 4. Histograms of two-dimensional projection in constellation. (a) Histogram in in-phase-dimension without CPE; (b) histogram in quadrature-dimension without CPE; (c) histogram in in-phase-dimension with CPE; (d) histogram in quadrature-dimension with CPE
Fig. 5. Schematic of CPE compensation algorithm based on two-dimensional projection histogram and pilots
Fig. 6. System simulation platform of CO-OFDM system based on MATLAB and OptiSystem
Fig. 7. Relationship between EVM performance and received optical power for PA, PH and PA-2PH algorithms with different pilot densities
Fig. 8. Relationship between EVM performance and received optical power. (a) Value of a is determined; (b) value of a matches the received optical power
Fig. 9. Comparison of actual and estimated phase noise. (a) 500 OFDM symbols for PH; (b) estimation error for PH; (c) 500 OFDM symbols for PA-2PH; (d) estimation error for PA-2PH
Fig. 10. Relationship between BER performance and received optical power for PA, PH and PA-2PH algorithms with different pilot densities
Fig. 11. Relationship between BER performance and received optical power for PA-PH and PA-2PH algorithms with different pilot densities
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Table 1. Simulation parameters of OFDM baseband in electric domain
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Table 2. Simulation parameters of CO-OFDM system and fiber channel
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