PMD Compensation in Polarization-Multiplexed Multilevel Modulations by Turbo Equalization

Minkov, L.L.; Djordjević, Ivan B.; Xu, Lei; Wang, Ting

doi:10.1109/lpt.2009.2031087

Cited by 15 publications

(4 citation statements)

References 4 publications

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“…We showed that with this scheme we can straightforwardly upgrade currently installed 10 Gb/s optical transmission systems to 100 Gb/s. In our recent paper 16 , we have shown that similar scheme can be used to compensate for PMD and any imbalance in phase between I and Q channels.…”

Section: Discussionmentioning

confidence: 99%

On the channel capacity of multilevel modulation schemes with coherent detection

Djordjević

Wang

2009

SPIE Proceedings

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We describe a method to determine the channel capacity of an arbitrary multilevel modulation scheme by modeling the fiber-optic channel as a dynamical nonlinear ISI channel with memory. We also propose a multilevel turbo-equalization scheme that is able closely to approach the channel capacity. We show that with this scheme we are able straightforwardly to upgrade currently installed 10 Gb/s optical transmission systems to 100 Gb/s, and even with small memory assumption we are able to achieve 100 Gb/s per DWDM channel transmission over 9600 km.

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Section: Discussionmentioning

confidence: 99%

On the channel capacity of multilevel modulation schemes with coherent detection

Djordjević

Wang

2009

SPIE Proceedings

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“…While TE techniques have been widely exploited for PMD compensation in direct detection schemes, their employment in coherent detection optical fiber transmission schemes is still limited. Until now experimental demonstrations are only reported for low density parity check (LDPC) coded TE polarization multiplexed Binary phase-shift keying (BPSK) [6] and Quadrature phase-shift keying (QPSK), and PDM orthogonal frequency division multiplexing (OFDM) 16 QAM [7]. Even though LDPC based TE scheme can be very powerful, alternative works are looking for simplified solution to overcome their high complexity [8], [9].…”

Section: Turbo Equalizationmentioning

confidence: 99%

Counteracting 16-QAM Optical Fiber Transmission Impairments With Iterative Turbo Equalization

Arlunno

Caballero

Borkowski

et al. 2013

IEEE Photon. Technol. Lett.

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A turbo equalization (TE) scheme based on convolutional code and normalized least mean square equalizer for coherent optical communication links is proposed and experimentally demonstrated. The proposed iterative TE technique is proved effective for counteracting polarization-division-multiplexing 16 quadrature amplitude modulation impairments in dispersion uncompensated coherent transmission links. Gains exceeding one order of magnitude in terms of bit error rate are obtained in experimental validation up to 497 km-standard single mode fiber link transmission.Index Terms-Digital signal processing, forward error correction, optical fiber communication.

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“…TE routines have been proposed for direct detection optical communication systems in order to mitigate the effects of PMD [15,16]. In coherent detection optical fiber communications, until now, experimental demonstration of low-density paritycheck (LDPC) coded TE [17][18][19] has been presented for polarization multiplexed binary phase-shift keying (BPSK) and QPSK. More recently LDPC-coded TE has also been evaluated in electrical generated PDM orthogonal frequency division multiplexing (OFDM) 16-QAM for transoceanic transmission with large-core/ultra-low-loss fiber [20].…”

Section: Introductionmentioning

confidence: 99%

Turbo Equalization Techniques Toward Robust PDM 16-QAM Optical Fiber Transmission

Arlunno¹,

Caballero²,

Borkowski³

et al. 2014

J. Opt. Commun. Netw.

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Abstract-In this paper, we show numerically and experimentally that turbo equalization (TE) is an efficient technique to mitigate performance degradations stemming from optical fiber propagation effects in both optical fiber dispersion managed and unmanaged coherent detection links. The effectiveness of the proposed solution can be appreciated in both linear and nonlinear regimes for either scenario. We report on a system employing a polarization division multiplexing (PDM) 16-quadrature amplitude modulation (QAM) format for which we accomplish an increment in tolerance to link input power of up to 3 dB that represents a substantial improvement margin. The best bit error rate (BER) performances will therefore be guaranteed in a larger window, 6 dB, of link input power thanks to the implemented TE scheme. Moreover, our proposed approach is also proven to effectively mitigate interchannel impairments from surrounding amplitude shift-keying interfering channels in a dispersion managed link achieving also in this case an increment in power tolerance of 3 dB. Furthermore, in terms of BER performances, our proposed TE approach guarantees a gain of about a half order of magnitude at the best operational point. As TE can be included in the current coherent detection transceiver technologies and complement other equalization techniques, it has prospects for application in next-generation high-capacity and long-reach optical transmission links.

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PMD Compensation in Polarization-Multiplexed Multilevel Modulations by Turbo Equalization

Cited by 15 publications

References 4 publications

On the channel capacity of multilevel modulation schemes with coherent detection

On the channel capacity of multilevel modulation schemes with coherent detection

Counteracting 16-QAM Optical Fiber Transmission Impairments With Iterative Turbo Equalization

Turbo Equalization Techniques Toward Robust PDM 16-QAM Optical Fiber Transmission

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