Performance of 20 Gb/s quaternary intensity modulation based on binary or duobinary modulation in two quadratures with unequal amplitudes

Ibrahim, Selwan K.; Bhandare, S.; Noé, R.

doi:10.1109/jstqe.2006.876318

Cited by 15 publications

(6 citation statements)

References 24 publications

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“…It was determined that by considering the correlation or dependencies between the amplitudes of transmitted pulses, we could achieve the symbol rate of 2 N symbols/s in a bandwidth of N Hz. This signaling method differs from the conventional pulse amplitude modulation (PAM) system in a sense that a controlled amount of inter-symbol interference (ISI) is introduced to attain certain spectral shapes, which allows to transmit 2 b/s/Hz achieving full theoretical capability [25][26][27]. This correlation between successive bits in a binary signal leads the data spectrum to be more concentrated around the optical carrier.…”

Section: Quadrature Duo-binary (Qdb) Modulationmentioning

confidence: 99%

Hybrid opto-digital signal processing in 112 Gbit/s DP-16QAM and DP-QDB transmission for long-haul large- $$\hbox {A}_\mathrm{eff}$$ A eff pure-silica-core fiber links

2015

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By means of numerical simulations, we demonstrated that all-optical signal processing methods (XPMsuppressor module and in-line nonlinear equalization) significantly increase the system performance of digital nonlinear compensation (digital backward propagation) and improve the system performance in five-channel 112 Gbit/s DP-16QAM and DP-QDB transmission over 2400 km largeeffective-area pure-silica-core fiber (LA eff -PSCF). The system performance is quantified with the help of Q-factor (dB) for both dispersion-managed and nondispersion-managed fiber links.

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Section: Quadrature Duo-binary (Qdb) Modulationmentioning

confidence: 99%

Hybrid opto-digital signal processing in 112 Gbit/s DP-16QAM and DP-QDB transmission for long-haul large- $$\hbox {A}_\mathrm{eff}$$ A eff pure-silica-core fiber links

2015

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“…The PolMux-QDB transmitter is depicted in Fig. 1(a), where it can be seen that in each polarization two duobinary signals are generated independently and afterwards quadrature modulated [6], [7]. The eye diagrams for DB (i), QDB (ii), and PolMux-QDB (iii) are shown in Fig.…”

Section: System Setupmentioning

confidence: 99%

“…In this letter, we investigate the possibility of using PolMux-quadrature duobinary (QDB) [6], [7] as a modulation format that can achieve a data rate of 100 Gb/s per channel with an SE of 4 b/s/Hz. At the same time, it allows for an acceptable tolerance to nonlinear transmission impairments and a simpler transmitter structure.…”

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confidence: 99%

111-Gb/s PolMux-Quadrature Duobinary for Robust and Bandwidth Efficient Transmission

Machi

Alfiad

Kuschnerov

et al. 2010

IEEE Photon. Technol. Lett.

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“…This correlation between successive bits in a binary signal leads the signal spectrum to be more concentrated around the optical carrier [11]. Correlative coding technique is realized by implementing quadrature duobinary (QDB) modulation in recent times [12,13] to attain high SE without increasing the complexity of the transmitter excessively [14,15]. The dual-polarization quadrature duobinary (DP-QDB) coding can have the SE of 4b/s/Hz at 100Gbit/s data rate and due to its relatively simple transmitter structure it becomes more attractive than DP-QAM [16].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of correlative coding and DP-16QAM n-channel 112Gbit/s coherent transmission: digital non-linear compensation perspective

Asif¹,

Lin²,

Holtmannspoetter³

et al. 2013

Opt. Express

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Abstract:We numerically report on the complexity reduction of digital backward propagation (DBP) by utilizing correlative encoded transmission (dual-polarization quadrature duobinary) at a bit-rate of 112Gbit/s over 1640km fibe link. The single channel (N=1) and multi-channel (N=10) transmission performances are compared in this paper. In case of multichannel system, 10 transmitters are multiplexed with 25GHz channel spacing. The fibe link consists of Large A e f f Pure-Silica core fibe with 20 spans of 82km each. No in-line optical dispersion compensator is employed in the link. The system performances are evaluated by monitoring the bit-error-ratio and the forward error correction limit corresponds to bit-error-ratio of 3.8x10 −3 . The DBP algorithm is implemented after the coherent detection and is based on the logarithmic step-size based splitstep Fourier method. The results depict that dual-polarization quadrature duobinary can be used to transmit 112Gbit/s signals with an spectral efficien y of 4-b/s/Hz, but at the same time has a higher tolerance to nonlinear transmission impairments. By utilizing dual-polarization quadrature duobinary modulation, comparative system performance with respect to dual-polarization 16-quadrature amplitude modulation transmission can be achieved with 60% less computations and with a step-size of 205km. B. Matthew, and S. K. Mishra, "Transmission of 32-Tb/s capacity over 580 km Using RZ-shaped PDM-8QAM modulation format and cascaded Mmltimodulus blind equalization algorithm," J. Lightwave Technol. 28(4), 456-465 (2010).

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Performance of 20 Gb/s quaternary intensity modulation based on binary or duobinary modulation in two quadratures with unequal amplitudes

Cited by 15 publications

References 24 publications

Hybrid opto-digital signal processing in 112 Gbit/s DP-16QAM and DP-QDB transmission for long-haul large- $$\hbox {A}_\mathrm{eff}$$ A eff pure-silica-core fiber links

Hybrid opto-digital signal processing in 112 Gbit/s DP-16QAM and DP-QDB transmission for long-haul large- $$\hbox {A}_\mathrm{eff}$$ A eff pure-silica-core fiber links

111-Gb/s PolMux-Quadrature Duobinary for Robust and Bandwidth Efficient Transmission

Evaluation of correlative coding and DP-16QAM n-channel 112Gbit/s coherent transmission: digital non-linear compensation perspective

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