Coherent free-space optical communications: Opportunities and challenges
FP Guiomar, MA Fernandes, JL Nascimento… - Journal of Lightwave …, 2022 - opg.optica.org
The ever-increasing data rate demand for wireless systems is pushing the physical limits of
standalone radio-frequency communications, thus fostering the blooming of novel high …
standalone radio-frequency communications, thus fostering the blooming of novel high …
Digital signal processing for fiber nonlinearities
Digital signal processing for fiber nonlinearities [Invited] clickable element to expand a topic
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Extended Kalman filter vs. geometrical approach for Stokes space-based polarization demultiplexing
By deriving the physical model of the system, which includes definitions of both state
variables and measurement equations, we apply an extended Kalman filter to Stokes space …
variables and measurement equations, we apply an extended Kalman filter to Stokes space …
Time-domain Volterra-based digital backpropagation for coherent optical systems
FP Guiomar, SB Amado, CS Martins… - Journal of Lightwave …, 2015 - ieeexplore.ieee.org
We propose a novel closed-form time-domain (TD) Volterra series nonlinear equalizer
(VSNE) for the mitigation of Kerr-related distortions in polarization-multiplexed (PM) …
(VSNE) for the mitigation of Kerr-related distortions in polarization-multiplexed (PM) …
Low complexity advanced DBP algorithms for ultra-long-haul 400 G transmission systems
SB Amado, FP Guiomar, NJ Muga… - Journal of Lightwave …, 2016 - opg.optica.org
We experimentally assess the performance versus complexity tradeoff of advanced split-step
and Volterra-based digital backpropagation (DBP) techniques, applied to a WDM (75-GHz …
and Volterra-based digital backpropagation (DBP) techniques, applied to a WDM (75-GHz …
Blind Polarization Demultiplexing of Shaped QAM Signals Assisted by Temporal Correlations
While probabilistic constellation shaping (PCS) enables rate and reach adaption with finer
granularity [1](Cho and Winzer, 2009), it imposes signal processing challenges at the …
granularity [1](Cho and Winzer, 2009), it imposes signal processing challenges at the …
Multicarrier digital backpropagation for 400G optical superchannels
FP Guiomar, SB Amado, RM Ferreira… - Journal of Lightwave …, 2016 - opg.optica.org
Optical superchannels and digital nonlinear mitigation are key technology options to be
considered for the deployment of next-generation optical 400G transmission systems. In this …
considered for the deployment of next-generation optical 400G transmission systems. In this …
Modified radius directed equaliser for high order QAM
The RDE for M-ary QAM equalisation is modified using a low-complexity probabilistic update
algorithm. Performance is investigated in simulation and experiment for 8 GBd DP-64QAM …
algorithm. Performance is investigated in simulation and experiment for 8 GBd DP-64QAM …
Real-time FPGA prototyping of a 15GBaud SP-16QAM coherent optical receiver with optimal interpolating for clock recovery and equalization
We demonstrate a real-time coherent optical receiver based on a single field programmable
gate array (FPGA) chip. To strike the balance between the performance and hardware …
gate array (FPGA) chip. To strike the balance between the performance and hardware …
ICI mitigation for dual-carrier superchannel transmission based on m-PSK and m-QAM formats
We propose an intercarrier interference (ICI) mitigation scheme for dual-carrier
superchannel transmission. Using the modified decision directed least mean square (DD …
superchannel transmission. Using the modified decision directed least mean square (DD …