Flexible polarization demultiplexing method based on an adaptive process noise covariance Kalman filter

Jun Ge; Lianshan Yan; Anlin Yi; Yan Pan; Lin Jiang; Liangliang Dai; Wei Pan; Bin Luo

doi:doi:10.3788/COL201816.060601

Chinese Optics Letters, 2018, 16 (6): 060601, Published Online: Jul. 2, 2018

Flexible polarization demultiplexing method based on an adaptive process noise covariance Kalman filter Download： 739次

Jun Ge Lianshan Yan ^*Anlin Yi Yan Pan Lin Jiang Liangliang Dai Wei Pan Bin Luo

Author Affiliations

Center for Information Photonics & Communications, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China

Figures & Tables

Fig. 1. Block diagram of the proposed PolDemux method based on an AKF.

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Fig. 2. Experimental setup and DSP flow of PDM-16QAM systems. (a) The B-to-B case; (b) the 560 km transmission link. ECL: external cavity laser; AWG: arbitrary waveform generator; PC: polarization controller; PBS: polarizing beam splitter; VODL: variable optical delay line; PBC: polarizing beam combiner; EDFA: erbium-doped fiber amplifier; ASE: amplified spontaneous emission; VOA: variable optical attenuator; SMF: single mode fiber; OC: 3 dB optical coupler; OBPF: optical bandpass filter; LO: local oscillator; BPD: balanced photodetector.

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Fig. 3. BER performance and required symbol for convergence vs. process noise (Q) in (a) a conventional EKF and (b) the proposed AKF for a PDM-16QAM signal in the B-to-B configuration, for OSNR = 20 dB.

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Fig. 4. BER performance vs. the polarization rotation frequency for the PDM-16QAM signal in a B-to-B configuration, for OSNR = 20 dB.

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Fig. 5. Comparison of (a) the MSE performance of the modulus of the demultiplexed signal, for OSNR = 20 dB; (b) the B-to-B BER performance.

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Fig. 6. Comparison of the B-to-B and 560 km transmission performance for the AKF.

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Fig. 7. Polarization tracking stability performance for the proposed method. (a) B-to-B BER performance (OSNR = 20 dB); (b) 560 km transmission BER performance (OSNR = 23 dB).

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Table1. Computational Complexity

Operations	Real Multiplication	Real Addition
Conventional EKF [14]	241	199
Proposed AKF	$245 + 4 N$	$195 + 8 N$

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Jun Ge, Lianshan Yan, Anlin Yi, Yan Pan, Lin Jiang, Liangliang Dai, Wei Pan, Bin Luo. Flexible polarization demultiplexing method based on an adaptive process noise covariance Kalman filter[J]. Chinese Optics Letters, 2018, 16(6): 060601.

Flexible polarization demultiplexing method based on an adaptive process noise covariance Kalman filter Download： 739次

Fig. 1. Block diagram of the proposed PolDemux method based on an AKF.

Fig. 3. BER performance and required symbol for convergence vs. process noise (Q) in (a) a conventional EKF and (b) the proposed AKF for a PDM-16QAM signal in the B-to-B configuration, for OSNR = 20 dB.

Fig. 4. BER performance vs. the polarization rotation frequency for the PDM-16QAM signal in a B-to-B configuration, for OSNR = 20 dB.

Fig. 5. Comparison of (a) the MSE performance of the modulus of the demultiplexed signal, for OSNR = 20 dB; (b) the B-to-B BER performance.

Fig. 6. Comparison of the B-to-B and 560 km transmission performance for the AKF.

Fig. 7. Polarization tracking stability performance for the proposed method. (a) B-to-B BER performance (OSNR = 20 dB); (b) 560 km transmission BER performance (OSNR = 23 dB).

Table1. Computational Complexity

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Flexible polarization demultiplexing method based on an adaptive process noise covariance Kalman filter Download： 739次

Fig. 1. Block diagram of the proposed PolDemux method based on an AKF.

Fig. 3. BER performance and required symbol for convergence vs. process noise (Q) in (a) a conventional EKF and (b) the proposed AKF for a PDM-16QAM signal in the B-to-B configuration, for OSNR = 20 dB.

Fig. 4. BER performance vs. the polarization rotation frequency for the PDM-16QAM signal in a B-to-B configuration, for OSNR = 20 dB.

Fig. 5. Comparison of (a) the MSE performance of the modulus of the demultiplexed signal, for OSNR = 20 dB; (b) the B-to-B BER performance.

Fig. 6. Comparison of the B-to-B and 560 km transmission performance for the AKF.

Fig. 7. Polarization tracking stability performance for the proposed method. (a) B-to-B BER performance (OSNR = 20 dB); (b) 560 km transmission BER performance (OSNR = 23 dB).

Table1. Computational Complexity

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