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 …

Digital signal processing for fiber nonlinearities

JC Cartledge, FP Guiomar, FR Kschischang, G Liga… - Optics express, 2017 - opg.optica.org
Digital signal processing for fiber nonlinearities [Invited] clickable element to expand a topic
LOGIN OR CREATE ACCOUNT PRISM SUBMISSION This website uses cookies to deliver …

Extended Kalman filter vs. geometrical approach for Stokes space-based polarization demultiplexing

NJ Muga, AN Pinto - Journal of Lightwave Technology, 2015 - ieeexplore.ieee.org
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 …

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) …

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 …

Blind Polarization Demultiplexing of Shaped QAM Signals Assisted by Temporal Correlations

V Bajaj, R Van de Plas, S Wahls - Journal of Lightwave …, 2023 - ieeexplore.ieee.org
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 …

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 …

Modified radius directed equaliser for high order QAM

D Lavery, M Paskov, R Maher… - 2015 European …, 2015 - ieeexplore.ieee.org
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 …

Real-time FPGA prototyping of a 15GBaud SP-16QAM coherent optical receiver with optimal interpolating for clock recovery and equalization

J Song, Y Li, J Qiu, Y Zuo, W Li, X Hong, H Guo… - Optics …, 2022 - opg.optica.org
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 …

ICI mitigation for dual-carrier superchannel transmission based on m-PSK and m-QAM formats

Z Xiao, S Fu, S Yao, M Tang, P Shum… - Journal of Lightwave …, 2016 - opg.optica.org
We propose an intercarrier interference (ICI) mitigation scheme for dual-carrier
superchannel transmission. Using the modified decision directed least mean square (DD …