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Frontiers of Optoelectronics

ISSN 2095-2759

ISSN 2095-2767(Online)

CN 10-1029/TN

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Front. Optoelectron.    2014, Vol. 7 Issue (4) : 493-500    https://doi.org/10.1007/s12200-014-0360-3
RESEARCH ARTICLE
Improved pilot data aided feed forward based on maximum likelihood for carrier phase jitter recovery in coherent optical orthogonal frequency division multiplexing
Jean TEMGA(),Deming LIU,Minming ZHANG
National Engineering Laboratory for Next Generation Internet Access System, Huazhong University of Science and Technology, Wuhan 430074, China
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Abstract

Pilot data aided feed forward (PAFF) carrier recovery is essential for phase noise tracking in coherent optical receivers. This paper describes a new PAFF system based on new pilot arrangement and maximum likelihood (ML) to estimate the phase jitter in coherent receiverinduced by local oscillator’s lasers and sampling clock errors. Square M-ary quadrature amplitude modulation (M-QAM) (4, 16, 64, and 256) schemes were used. A detailed mathematical description of the method was presented. The system performance was evaluated through numerical simulations and compared to those with noise-free receiver (ideal receiver) and feed forward without ML. The simulation results show that PAFF performs near the expected ideal phase recovery. Results clearly suggest that ML significantly improves the tolerance of phase error variance. From bit error rate (BER) sensibility evaluation, it was clearly observed that the new estimation method performs better with a 4-QAM (or quadrature phase shift keying (QPSK)) format compared to three others square QAM schemes. Analog to digital converter (ADC) resolution effect on the system performance was analyzed in terms of Q-factor. Finite resolution effect on 4-QAM is negligible while it negatively affects the system performance when M increases.
Keywords coherent optical orthogonal frequency division multiplexing (CO-OFDM)      phase noise      feed forward (FF)      maximum likelihood (ML)      phase error variance      bit error rate (BER)      Q-factor     
Corresponding Author(s): Jean TEMGA   
Online First Date: 13 March 2014    Issue Date: 12 December 2014
 Cite this article:   
Jean TEMGA,Deming LIU,Minming ZHANG. Improved pilot data aided feed forward based on maximum likelihood for carrier phase jitter recovery in coherent optical orthogonal frequency division multiplexing[J]. Front. Optoelectron., 2014, 7(4): 493-500.
 URL:  
https://academic.hep.com.cn/foe/EN/10.1007/s12200-014-0360-3
https://academic.hep.com.cn/foe/EN/Y2014/V7/I4/493
Fig.1  Architecture of digital signal processing-based CO-OFDM
Fig.2  Pilots arrangement for carrier phase jitter recovery (CPJR)
N s OFDM symbols numbers in one OFDM frame;
N sb Number of subcarriers in one OFDM symbol;
i OFDM index of subcarriers in the frame ( i = 1 , 2 , ... , N sb );
k OFDM index of symbols in the frame ( k = 1 , 2 , ... , N s );
X k , i Position of subcarriers inside the frame;
p k , i Position of pilots inside the frame.
Tab.1  
Fig.3  Physical framing structure of CO-OFDM signal with regularly inserted pilot symbol
Fig.4  Illustration of PA FFML for CPJR
Fig.5  Penalty sensitivity for CO-OFDM noise-free receiver, PA FF CPJR receiver and PA FFML CPJR receiver. (a) 4-QAM (QPSK); (b) 16-QAM; (c) 64-QAM; (d) 256-QAM
phase recovery techniques 4-QAM (QPSK) 16-QAM 64-QAM 256-QAM
max tolerable σθ2 for 1 dB at BER= 10-3 max tolerable Δ f for 1 T s = 1 Gbaud max tolerable σθ2 for 1 dB at BER= 10-3 max tolerable Δ f for 1 T s = 1 Gbaud max tolerable σθ2 for 1 dB at BER= 10-3 max tolerable Δ f for 1 T s = 1 Gbaud max tolerable σθ2 for 1 dB at BER= 10-3 max tolerable Δ f for 1 T s = 1 Gbaud
ideal receiver 56.55 × 10 - 3 9 MHz 56.55 × 10 - 4 0.9 MHz 53.40 × 10 - 5 85 kHz 31.42 × 10 - 5 50 kHz
PA FF CPJR 6.28 × 10 - 4 0.1 MHz 3.14 × 10 - 5 5 kHz 15.71 × 10 - 5 25 kHz 50.27 × 10 - 6 8 kHz
PA FFML CPJR 9.42 × 10 - 3 1.5 MHz 6.28 × 10 - 4 0.1 MHz 44 × 10 - 5 70 kHz 44 × 10 - 6 7 kHz
Tab.2  Linewidth requirements for PA FF CPJR with different square QAM constellations for OSNR= 1 dB
Fig.6  BER performance comparison for different square M-QAM PA FF CPJR impacted by phase noise
Fig.7  Impact of ADC resolutions on receiver sensitivity of CO-OFDM using square-QAM and PA FFML CPJR
1 Sun H, Wu K T, Roberts K. Real-time measurements of a 40 Gb/s coherent system. Optics Express, 2008, 16(2): 873–879
https://doi.org/10.1364/OE.16.000873 pmid: 18542161
2 Roberts K, O'Sullivan M, Wu K T, Sun H, Awadalla A, Krause D J, Laperle C. Performance of dual-polarization QPSK for optical transport systems. Journal of Lightwave Technology, 2009, 27(16): 3546–3559
https://doi.org/10.1109/JLT.2009.2022484
3 Shieh W, Djordjevic I. OFDM for optical communications. Access Online via Elsevier
4 Winzer P J. Beyong 100 G ethernet. IEEE Communications Magazine, 2010, 48(7): 26–30
https://doi.org/10.1109/MCOM.2010.5496875
5 Agrawal G P. Fiber-Optic Communication Systems. 3rd ed, Hoboken: John Wiley & Sons, Inc., 2002
6 Zhang X, Pang X, Deng L, Zibar D, Monroy I T, Younce R. High phase noise tolerant pilot-tone-aided DP-QPSK optical communication systems. Optics Express, 2012, 20(18): 19990–19995
https://doi.org/10.1364/OE.20.019990 pmid: 23037051
7 Temga J, Zhang M M, Liu D M. Influence of sampling jitter effects on the performance of OFDM in optical network. In: Proceedings of 3rd International Conference on Internet Technology and Application, 2012
8 Sliskovic M. Sampling frequency offset estimation and correction in OFDM systems. In: Proceedings of 8th IEEE International Conference on Electronics, Circuits and Systems, 2001, 437–440
9 Sliskovic M. Carrier and sampling frequency offset estimation and correction in multicarrier systems. In: Proceedings of IEEE Global Telecommunications Conference, 2001, 285–289
10 Jansen S L, Morita I, Schenk T C W, Takeda N, Tanaka H. Coherent optical 25.8-Gb/s OFDM transmission over 4160-km SSMF. Journal of Lightwave Technology, 2008, 26(1): 6–15
https://doi.org/10.1109/JLT.2007.911888
11 Giddings R, Tang J. World-first experimental demonstration of synchronous clock recovery in an 11.25 Gb/s real-time end-to-end optical OFDM system using directly modulated DFBs. In: Proceedings of Optical Fiber Communication Conference, 2011
12 Giddings R P, Tang J M. Experimental demonstration and optimisation of a synchronous clock recovery technique for real-time end-to-end optical OFDM transmission at 11.25 Gb/s over 25 km SSMF. Optics Express, 2011, 19(3): 2831–2845
https://doi.org/10.1364/OE.19.002831 pmid: 21369104
13 Shieh W, Yi X, Tang Y. Transmission experiment of multi-gigabit coherent optical OFDM systems over 1000 km SSMF fibre. Electronics Letters, 2007, 43(3): 183–185
https://doi.org/10.1049/el:20073496
14 Pfau T, Peveling R, Hauden J, Grossard N, Porte H, Achiam Y, Hoffmann S, Ibrahim S, Adamczyk O, Bhandare S, Sandel D, Porrmann M, Noé R. Coherent digital polarization diversity receiver for real-time polarization- multiplexed QPSK transmission at 2.8 Gbit/s. IEEE Photonics Technology Letters, 2007, 19(24): 1988–1990
https://doi.org/10.1109/LPT.2007.909897
15 Tang Y, Shieh W, Yi X, Evans R. Optimum design for RF-to-optical up-converter in coherent optical OFDM Systems. IEEE Photonics Technology Letters, 2007, 19(7): 483–485
https://doi.org/10.1109/LPT.2007.893582
16 Temga J, Zhang M M, Liu D M, He W L. Performance analysis of coherent optical OFDM with weiner phase noise jitters. In: Proceedings of Information Optoelectronics, Nanofabrication and Testing, 2012
17 Ip E, Lau A P T, Barros D J F, Kahn J M. Coherent detection in optical fiber systems. Optics Express, 2008, 16(2): 753–791
https://doi.org/10.1364/OE.16.000753 pmid: 18542153
18 Oppenheim A V, Shalfer R W, Buck J R. Discrete-Time Signal Processing. 2nd ed. New Jersey: Prentice-Hall, 1999
19 Lu G W, Sk?ld M, Johannisson P, Zhao J, Sj?din M, Sunnerud H, Westlund M, Ellis A, Andrekson P A. 40-Gbaud 16-QAM transmitter using tandem IQ modulators with binary driving electronic signals. Optics Express, 2010, 18(22): 23062–23069
https://doi.org/10.1364/OE.18.023062 pmid: 21164647
20 Pfau T, Hoffmann S, Noe R. Hardware-efficient coherent digital receiver concept with feedforward carrier recovery for M-QAM constellations. Journal of Lightwave Technology, 2009, 27(8): 989–999
https://doi.org/10.1109/JLT.2008.2010511
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