Electronic Dispersion Compensation

Bülow, H.; Buchali, Fred; Klekamp, A.

doi:10.1109/jlt.2007.913066

Cited by 132 publications

(74 citation statements)

References 29 publications

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“…Optical impairments such as chromatic dispersion (CD), polarization mode dispersion (PMD), phase noise (PN) and nonlinear effects degrade the performance of high speed optical fiber transmission systems severely [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Carrier phase estimation methods in coherent transmission systems influenced by equalization enhanced phase noise

Jacobsen

Popov

et al. 2013

Optics Communications

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. (2013) Carrier phase estimation methods in coherent transmission systems influenced by equalization enhanced phase noise. Optics Communications, 293. pp. 54-60. Permanent WRAP URL: http://wrap.warwick.ac.uk/93880 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription. ABSTRACTWe present a comparative study on three carrier phase estimation algorithms, including a one-tap normalized least mean square (NLMS) method, a block-average method, and a Viterbi-Viterbi method in the n-level phase shift keying coherent transmission systems considering the equalization enhanced phase noise (EEPN). In these carrier phase estimation methods, the theoretical bit-error-rate floors based on traditional leading-order Taylor expansion are compared to the practical simulation results, and the tolerable total effective linewidths (involving the transmitter, the local oscillator lasers and the EEPN) for a fixed bit-error-rate floor are evaluated with different block size, when the fiber nonlinearities are neglected. The complexity of the three carrier phase estimation methods is also discussed. We find that the carrier phase estimation methods in practical systems should be analyzed based on the simulation results rather than the traditional theoretical predictions, when large EEPN is involved. The one-tap NLMS method can always show an acceptable behavior, while the step size is complicated to optimize. The block-average method is efficient to implement, but it behaves unsatisfactorily when using a large block size. The Viterbi-Viterbi method can show a small improvement compared to the block-average method, while it requires more computational complexity.

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Section: Introductionmentioning

confidence: 99%

Carrier phase estimation methods in coherent transmission systems influenced by equalization enhanced phase noise

Jacobsen

Popov

et al. 2013

Optics Communications

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“…In Figure 6 the performance of VDFE and SVDFE equalizers for different sets of [M f ,M b ] are presented accompanied with the total number of coefficients used for each case. It has become evident that, for both VDFE and SVDFE, large numbers of M f and M b (e.g., [13,7] and [11,6]) result in a dramatic increase of the number of coefficients but does not result in a notable increase in performance compared to the equalizers with smaller values of [M f ,M b ] (e.g., [9,5] …”

Section: Optical Layer Simulationmentioning

confidence: 99%

“…Chromatic dispersion (CD) is the prevailing linear impairment that causes intersymbol interference (ISI) [2]. Distortion compensation techniques have been made readily available with optical and electronic means [5][6][7]. Optical compensators are usually based on dispersion…”

Section: Introductionmentioning

confidence: 99%

High-Speed, High-Performance DQPSK Optical Links with Reduced Complexity VDFE Equalizers

et al. 2017

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Optical transmission technologies optimized for optical network segments sensitive to power consumption and cost, comprise modulation formats with direct detection technologies. Specifically, non-return to zero differential quaternary phase shift keying (NRZ-DQPSK) in deployed fiber plants, combined with high-performance, low-complexity electronic equalizers to compensate residual impairments at the receiver end, can be proved as a viable solution for high-performance, high-capacity optical links. Joint processing of the constructive and the destructive signals at the single-ended DQPSK receiver provides improved performance compared to the balanced configuration, however, at the expense of higher hardware requirements, a fact that may not be neglected especially in the case of high-speed optical links. To overcome this bottleneck, the use of partially joint constructive/destructive DQPSK equalization is investigated in this paper. Symbol-by-symbol equalization is performed by means of Volterra decision feedback-type equalizers, driven by a reduced subset of signals selected from the constructive and the destructive ports of the optical detectors. The proposed approach offers a low-complexity alternative for electronic equalization, without sacrificing much of the performance compared to the fully-deployed counterpart. The efficiency of the proposed equalizers is demonstrated by means of computer simulation in a typical optical transmission scenario.

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“…Together with the advances in high-speed digital signal processing (DSP) techniques, coherent detection is believed to be one of the next major enabling technologies to realize high spectral efficiency transmission at 100Gb/s per channel and beyond. The flexibility and scalability of DSP in coherent systems are studied for compensation of transmission impairments such as chromatic dispersion (CD) [2][3][4][5], polarization-mode dispersion (PMD) [6][7][8], Kerr nonlinearity [5,[9][10][11][12][13] and carrier phase recovery [14][15][16]. For DSP based CD compensation, Savory et al…”

Section: Introductionmentioning

confidence: 99%

Equalization-enhanced phase noise for 100Gb/s transmission and beyond with coherent detection

Lau

Shieh

Ho³

2010

2010 IEEE International Conference on Communication Systems

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The probability density function and impact of equalizationenhanced phase noise (EEPN) is analytically investigated and simulated for 100 Gb/s coherent systems using electronic dispersion compensation. EEPN impairment induces both phase noise and amplitude noise with the former twice as much as the latter. The effects of transmitter phase noise on EEPN are negligible for links with residual dispersion in excess of 700 ps/nm. Optimal linear equalizer in the presence of EEPN is derived but show only marginal performance improvement, indicating that EEPN is difficult to mitigate using simple DSP techniques. In addition, the effects of EEPN on carrier recovery techniques and corresponding cycle slip probabilities are studied.

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Electronic Dispersion Compensation

Cited by 132 publications

References 29 publications

Carrier phase estimation methods in coherent transmission systems influenced by equalization enhanced phase noise

Carrier phase estimation methods in coherent transmission systems influenced by equalization enhanced phase noise

High-Speed, High-Performance DQPSK Optical Links with Reduced Complexity VDFE Equalizers

Equalization-enhanced phase noise for 100Gb/s transmission and beyond with coherent detection

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