Search Results for author: Ognjen Jovanovic

Found 11 papers, 0 papers with code

BICM-compatible Rate Adaptive Geometric Constellation Shaping Using Optimized Many-to-one Labeling

no code implementations10 Nov 2023 Metodi Plamenov Yankov, Smaranika Swain, Ognjen Jovanovic, Darko Zibar, Francesco Da Ros

The GCS scheme is experimentally demonstrated in a multi-span recirculating loop coherent optical fiber transmission system with a total distance of up to 3000 km.

Quantization

Differentiable Machine Learning-Based Modeling for Directly-Modulated Lasers

no code implementations27 Sep 2023 Sergio Hernandez, Ognjen Jovanovic, Christophe Peucheret, Francesco Da Ros, Darko Zibar

End-to-end learning has become a popular method for joint transmitter and receiver optimization in optical communication systems.

Low-complexity Samples versus Symbols-based Neural Network Receiver for Channel Equalization

no code implementations28 Aug 2023 Yevhenii Osadchuk, Ognjen Jovanovic, Stenio M. Ranzini, Roman Dischler, Vahid Aref, Darko Zibar, Francesco Da Ros

In this work, we propose a low-complexity NN that performs samples-to-symbol equalization, meaning that the NN-based equalizer includes match filtering and downsampling.

Addressing Data Scarcity in Optical Matrix Multiplier Modeling Using Transfer Learning

no code implementations10 Aug 2023 Ali Cem, Ognjen Jovanovic, Siqi Yan, Yunhong Ding, Darko Zibar, Francesco Da Ros

We present and experimentally evaluate using transfer learning to address experimental data scarcity when training neural network (NN) models for Mach-Zehnder interferometer mesh-based optical matrix multipliers.

Transfer Learning

Rate Adaptive Geometric Constellation Shaping Using Autoencoders and Many-To-One Mapping

no code implementations19 Jul 2023 Metodi P. Yankov, Ognjen Jovanovic, Darko Zibar, Francesco Da Ros

A many-to-one mapping geometric constellation shaping scheme is proposed with a fixed modulation format, fixed FEC engine and rate adaptation with an arbitrarily small step.

Data-Driven Modeling of Directly-Modulated Lasers

no code implementations15 May 2023 Sergio Hernandez Fernandez, Christophe Peucheret, Ognjen Jovanovic, Francesco Da Ros, Darko Zibar

The end-to-end optimization of links based on directly-modulated lasers may require an analytically differentiable channel.

Reservoir Computing-based Multi-Symbol Equalization for PAM 4 Short-reach Transmission

no code implementations29 Nov 2022 Yevhenii Osadchuk, Ognjen Jovanovic, Darko Zibar, Francesco Da Ros

We propose spectrum-sliced reservoir computer-based (RC) multi-symbol equalization for 32-GBd PAM4 transmission.

Data-efficient Modeling of Optical Matrix Multipliers Using Transfer Learning

no code implementations29 Nov 2022 Ali Cem, Ognjen Jovanovic, Siqi Yan, Yunhong Ding, Darko Zibar, Francesco Da Ros

We demonstrate transfer learning-assisted neural network models for optical matrix multipliers with scarce measurement data.

Transfer Learning

End-to-end Learning of a Constellation Shape Robust to Channel Condition Uncertainties

no code implementations16 Nov 2021 Ognjen Jovanovic, Metodi P. Yankov, Francesco Da Ros, Darko Zibar

Two noise models are considered for the additive noise: white Gaussian noise and nonlinear interference noise model for fiber nonlinearities.

End-to-end Learning of a Constellation Shape Robust to Variations in SNR and Laser Linewidth

no code implementations1 Jun 2021 Ognjen Jovanovic, Metodi P. Yankov, Francesco Da Ros, Darko Zibar

We propose an autoencoder-based geometric shaping that learns a constellation robust to SNR and laser linewidth estimation errors.

Gradient-free training of autoencoders for non-differentiable communication channels

no code implementations21 Dec 2020 Ognjen Jovanovic, Metodi Plamenov Yankov, Francesco Da Ros, Darko Zibar

Our results indicate that the autoencoder can be successfully optimized using the proposed training method to achieve better robustness to residual phase noise with respect to standard constellation schemes such as Quadrature Amplitude Modulation and Iterative Polar Modulation for the considered conditions.

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