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In this paper, we present an estimation of the digital signal processing (DSP) computational complexity for some specific optical line terminal (OLT) architectures for passive optical network (PON) applications, based on electrical frequency division multiplexing (FDM) of user data channels. The complexity and feasibility estimations is a key task in any DSP based transmission solution investigation...
We demonstrate that the traffic capacity of legacy DWDM reconfigurable networks can be boosted thanks to the Nyquist-WDM technique and PM-64QAM modulation format. To this end, dual carrier and single carrier channels with raw transmission bit rate spanning from 224 Gb/s to 600 Gb/s have been generated by means of fast DAC and electrical digital filtering.
We propose four strategies for TDHMF Tx operation. BER minimization permits PM-QPSK/PM-16QAM performance similar to PM-8QAM's. In TDHMF nonlinear propagation, predistortion and/or polarization interleaving enables the maximum reach predicted by GN-model.
We report on a comprehensive performance comparison of seven different fiber types: transmission experiments based on of Nyquist-WDM using PM-16QAM modulation over uncompensated links show a perfect agreement with GN model prediction.
Recently proposed non-linear propagation models allow to derive simple link optimization rules. We show that local optimization leads to global optimization (LOGO) and propose a network optimization strategy (LOGON) that allows substantial control-plane simplification.
Using serial-transmission 112Gb/s PM-16QAM we achieved net SE 7.12 and 6.32 b/s/Hz, and SE(x)distance 13,949 and 23,396 b/s/Hz·km, for 7% and 20.5% FEC overhead, respectively, by means of DAC-enabled spectral engineering, over high-performance PSCF.
We derive closed-form expressions depending on a single fitting parameter for performance prediction of WDM PM-QPSK long-haul uncompensated transmission. Besides general properties, we demonstrate that nonlinear penalty is always equal to 1.76 dB.
We introduce an improved Figure of Merit for comparing different uncompensated fiber links for coherent transmission. The role of fiber dispersion in enhancing system performance is shown and verified by simulations and experiments.
We present an experimental validation over different fiber types of an analytical model for nonlinear propagation in uncompensated optical transmission links. An ultra-dense WDM scenario was analyzed, transmitting a comb of ten 120-Gb/s PM-QPSK signals.
We show experimental results on the transmission of a Terabit superchannel, consisting of 10×120-Gb/s PM-QPSK densely-packed subcarriers. We reached 10000km with 1.1×Baud-rate subcarrier spacing and 9000km with Baud-rate subcarrier spacing. We also reached 8000km with 3 superchannels at 1.1 spacing.
We investigate the estimation of channel parameters from the receiver equalizer taps after CMA, in a 8,000km 30×120Gbit/s PM-QPSK transmission system experiment. We also show long-term results of joint measurements of BER, DGD and PDL.
We experimentally compare BER performance obtained by doubling the data-rate from 10 Gb/s RZ-IMDD modulation format to 20-Gb/s-equivalent RZ-DQPSK format in a standard 2000-km 33-GHz spaced 64-channel DWDM link.
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