112&amp;#x00D7;112 Gb/s transmission over 9,360 km with channel spacing set to the baud rate (360% spectral efficiency)

Cai, J.-X.; Cai, Yi; Sun, Yu; Davidson, Carl; Foursa, D. G.; Lucero, A.; Sinkin, O. V.; Patterson, W.W.; Pilipetskii, A.N.; Mohs, G.; Bergano, Neal S.

doi:10.1109/ecoc.2010.5621367

Cited by 24 publications

(15 citation statements)

References 3 publications

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“…Paper [22] showed that the polarization tracking ability of the CMA-FF can be generalized to bandwidth-constrained systems. As a consequence, the generated results regarding the MMSE-DFE without CMA-FF can be directly generalized to transmission schemes using CMA-FF.…”

Section: B Simulation Parametrizationmentioning

confidence: 99%

Decision-Feedback Equalization of Bandwidth-Constrained N-WDM Coherent Optical Communication Systems

Fickers

Ghazisaeidi²,

Salsi³

et al. 2013

J. Lightwave Technol.

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Abstract-Nyquist Wavelength division multiplexing (N-WDM), is a promising scheme in order to enhance the spectral efficiency of future coherent optical communication systems. In N-WDM systems, the channel bandwidth and spacing are selected to maximize the spectral efficiency while maintaining acceptable levels of inter-carrier and inter symbol interference. To further increase the spectral efficiency, bandwidth constrained N-WDM, where baudrate is higher than channel bandwidth can be considered. We propose to combine the bandwidth-constrained N-WDM scheme with a decision feedback equalizer (DFE) designed according to the minimum mean square error (MMSE) criterion. We show that the enhanced resilience to the inter symbol interference offered by DFE provides an effective gain on spectral efficiency. We compare system benefits of DFE and maximum a posteriori sequence detection (MAP) for coherent optical receivers, and show that DFE is as efficient as MAP in mitigating inter symbol interference at a considerably lower complexity.

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Section: B Simulation Parametrizationmentioning

confidence: 99%

Decision-Feedback Equalization of Bandwidth-Constrained N-WDM Coherent Optical Communication Systems

Fickers

Ghazisaeidi²,

Salsi³

et al. 2013

J. Lightwave Technol.

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“…To keep the same baud rate, which is feasible for today's technology, PDM-16 QAM is considered as another promising candidate for doubling the bit rate per channel, although its implementation will face the challenge of increasing the complexity and cost of the transmitter as well as the computational power consumed by DSP at the receiver. Besides, its transmission distance is limited because of the shortened Euclidean distance between adjacent symbols [7]- [9].…”

Section: Introductionmentioning

confidence: 99%

Transmission of 200 G PDM-CSRZ-QPSK and PDM-16 QAM With a SE of 4 b/s/Hz

Dong

Chien

et al. 2013

J. Lightwave Technol.

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We have realized the first field transmission of 8 216.8-Gb/s Nyquist wavelength-division-multiplexing (N-WDM) signals over 1750-km G.652 fiber consisting of 950-km real and 800-km lab fibers with erbium-doped fiber amplifier (EDFA)-only amplification. The average loss per span is 21.6 dB. Each channel is modulated with 54.2-Gbaud (216.8-Gb/s) polarization-division-multiplexing carrier-suppressed return-to-zero quadrature-phase-shift-keying (PDM-CSRZ-QPSK) data on a 50-GHz grid giving a record spectral efficiency (SE) of 4 b/s/Hz. Digital post filtering and 1-bit maximum likelihood sequence estimation (MLSE) are introduced into the offline digital signal processing (DSP) at the receiver to suppress noise, linear crosstalk and filtering effects. We have also investigated the co-transmission of 200 G PDM-CSRZ-QPSK and 200 G PDM 16-ary quadrature-amplitude-modulation (PDM-16 QAM) signals on a 50-GHz grid, and found that PDM-CSRZ-QPSK signals have better bit-error-rate (BER) performance for both back-to-back and 700-km transmission cases. Meanwhile, PDM-16 QAM signals are subject to larger crosstalk from the neighboring Nyquist QPSK channels.

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“…Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription. Introduction: Coherent optical communications research activities focuses currently on achieving system bit-rates of 100 -1000 Gb/s and to apply electronic dispersion equalization to account for several thousand kilometers of transmission [1,2]. Practical high capacity system configurations have been polarization multiplexed n-level phase shift keying (nPSK) and quadrature amplitude modulation (nQAM) systems (n = 4, 8, 16, 32, 64,…) with differential detection.…”

Section: A Note On Versionsmentioning

confidence: 99%

“…Gunnar Jacobsen 1 Abstract: An analytical model for the phase noise influence in differential n-level phase shift keying (nPSK) systems and 2n-level quadrature amplitude modulated (2nQAM) systems employing electronic dispersion equalization and quadruple carrier phase extraction is presented. The model includes the dispersion equalization enhanced local oscillator phase noise influence.…”

Section: Error-rate Floors In Differential N-level Phase-shift-keyingmentioning

confidence: 99%

Error-rate Floors in Differential n-level Phase-shift-keying Coherent Receivers employing Electronic Dispersion Equalisation

Jacobsen

Popov

et al. 2011

Joc

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(2011) Error-rate floors in differential n-level phase-shift-keying coherent receivers employing electronic dispersion equalisation. Journal of Optical Communications,. Permanent WRAP URL:http://wrap.warwick.ac.uk/93887 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. Publisher's statement:"The final publication is available at www.degruyter.com ". : http://dx.doi.org/10.1515/JOC.2011.031 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. Introduction: Coherent optical communications research activities focuses currently on achieving system bit-rates of 100 -1000 Gb/s and to apply electronic dispersion equalization to account for several thousand kilometers of transmission [1,2]. Practical high capacity system configurations have been polarization multiplexed n-level phase shift keying (nPSK) and quadrature amplitude modulation (nQAM) systems (n = 4, 8, 16, 32, 64,…) with differential detection. The demodulation in the receiver is coherent (with an optical transmitter (Tx) and local oscillator (LO) laser) and effectively homodyne since homodyne detection provides the closest possible channel stacking in wavelength division multiplexed (WDM) system implementations as well as the best system sensitivity. Phase noise becomes a prime system design parameter for high-constellation coherent systems since it affects the electronic carrier phase extraction [3,4] and furthermore the LO phase noise influence is enhanced by electronic dispersion compensation [5]. It is possible (and straightforward) to extend the analytical derivation for the enhanced LO phase noise in [5] to specify the BER floor for nPSK and 2nQAM systemswith and without practical n-power carrier phase extraction by generalizing results from [3,4]. In [6] a similar study including the Viterbi-Viterbi carrier phase extraction has been presented. The purpose of our paper is to provide practically important

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112×112 Gb/s transmission over 9,360 km with channel spacing set to the baud rate (360% spectral efficiency)

Cited by 24 publications

References 3 publications

Decision-Feedback Equalization of Bandwidth-Constrained N-WDM Coherent Optical Communication Systems

Decision-Feedback Equalization of Bandwidth-Constrained N-WDM Coherent Optical Communication Systems

Transmission of 200 G PDM-CSRZ-QPSK and PDM-16 QAM With a SE of 4 b/s/Hz

Error-rate Floors in Differential n-level Phase-shift-keying Coherent Receivers employing Electronic Dispersion Equalisation

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