Simultaneous optical signal to noise ratio and symbol rate estimation with blind chromatic dispersion compensation for auxiliary amplitude modulation optical signals

Junyu Wei; Jiangyi Qin; Zhiping Huang; Xiaojun Guo

doi:10.3788/COL201614.090603

Chinese Optics Letters, Volume. 14, Issue 9, 090603(2016)

Simultaneous optical signal to noise ratio and symbol rate estimation with blind chromatic dispersion compensation for auxiliary amplitude modulation optical signals

Junyu Wei^*, Jiangyi Qin, Zhiping Huang, and Xiaojun Guo

Author Affiliations

College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China

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Fig. 1. System structure for OSNR and SR estimation using the PTVR of the AMDF.

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Fig. 2. Raw data and 8-order Fourier fitting plot of the AMDF for 10 Gsymbol/s (a) RZ-OOK, (b) RZ-DPSK, (c) RZ-DQPSK, and (d) RZ-16QAM.

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Fig. 3. PTVR versus accumulated CD for 10 Gsymbol/s (a) RZ-OOK, (b) RZ-DPSK, (c) RZ-DQPSK, and (d) RZ-16QAM.

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Fig. 4. Variations of the PTVR versus compensated CD when the actual CD=300 ps/nm for 10 Gsymbol/s (a) RZ-OOK, (b) RZ-DPSK, (c) RZ-DQPSK, and (d) RZ-16QAM.

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Fig. 5. PTVR raw data versus the OSNR for 10 Gsymbol/s (a) RZ-OOK, (b) RZ-DPSK, (c) RZ-DQPSK, and (d) RZ-16QAM.

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Fig. 6. (a) FOSNR_est versus actual OSNR; (b) the OSNR estimation error versus actual OSNR.

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Fig. 7. OSNR absolute estimation error versus PMD for 10 Gsymbol/s (a) RZ-OOK, (b) RZ-DPSK, (c) RZ-DQPSK, and (d) RZ-16QAM.

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Fig. 8. SR estimation error versus the PMD for 10 Gsymbol/s (a) RZ-OOK, (b) RZ-DPSK, (C) RZ-DQPSK, and (d) RZ-16QAM.

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Table 1. Coefficients of 5-order Polynomial Fitting Calculated for OSNR Monitoring with Different Modulation Formatsa

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Table 1. Coefficients of 5-order Polynomial Fitting Calculated for OSNR Monitoring with Different Modulation Formatsa

	The coefficients of 5-order polynomial fitting by RMSE and Adj. R-Square algorithms
Modulation formats	p5	p4	p3	p2	p1	p0
RZ	1.646 × 10⁵	−9.641 × 10⁵	2.257 × 10⁶	−2.639 × 10⁶	1.542 × 10⁶	−3.6 × 10⁵
RZ-DPSK	0.1051	−1.998	14.64	−51.58	90.28	−41.2
RZ-DQPSK	0.02304	−0.4546	3.585	−14.05	30.44	−11.6
RZ-16QAM	3.587 × 10²	−3.116 × 10³	1.075 × 10⁴	−1.842 × 10⁴	1.566 × 10⁴	−5.28 × 10³

Table 2. SR Estimation Errors for 10 Gsymbol/s Different AAMs Using AMDF
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Table 2. SR Estimation Errors for 10 Gsymbol/s Different AAMs Using AMDF
SR Estimation Error (%)
Modulation formats SR Rstimation Without Blind CD Compensation SR Estimation With Blind CD Compensation
RZ-OOK $< 1.5$ $< 0.08$
RZ-DPSK $< 1.5$ $< 0.082$
RZ-DQPSK $< 2$ $< 0.083$
RZ-16QAM $< 2$ $< 0.071$

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Junyu Wei, Jiangyi Qin, Zhiping Huang, Xiaojun Guo, "Simultaneous optical signal to noise ratio and symbol rate estimation with blind chromatic dispersion compensation for auxiliary amplitude modulation optical signals," Chin. Opt. Lett. 14, 090603 (2016)

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