Search Results for author: Alexander Bertrand

Found 17 papers, 7 papers with code

A Distributed Adaptive Algorithm for Non-Smooth Spatial Filtering Problems in Wireless Sensor Networks

no code implementations13 Mar 2024 Charles Hovine, Alexander Bertrand

A wireless sensor network often relies on a fusion center to process the data collected by each of its sensing nodes.

Stimulus-Informed Generalized Canonical Correlation Analysis for Group Analysis of Neural Responses

1 code implementation31 Jan 2024 Simon Geirnaert, Yuanyuan Yao, Tom Francart, Alexander Bertrand

In this context, generalized canonical correlation analysis (GCCA) is often used as a group analysis technique, which allows the extraction of correlated signal components from the neural activity of multiple subjects attending to the same stimulus.

Brain Computer Interface EEG

Minimally Informed Linear Discriminant Analysis: training an LDA model with unlabelled data

no code implementations17 Oct 2023 Nicolas Heintz, Tom Francart, Alexander Bertrand

Linear Discriminant Analysis (LDA) is one of the oldest and most popular linear methods for supervised classification problems.

Distributed Adaptive Signal Fusion for Fractional Programs

no code implementations12 Sep 2023 Cem Ates Musluoglu, Alexander Bertrand

The distributed adaptive signal fusion (DASF) framework allows to solve spatial filtering optimization problems in a distributed and adaptive fashion over a bandwidth-constrained wireless sensor network.

A distributed neural network architecture for dynamic sensor selection with application to bandwidth-constrained body-sensor networks

no code implementations16 Aug 2023 Thomas Strypsteen, Alexander Bertrand

We then show how we can use this dynamic selection to increase the lifetime of a wireless sensor network (WSN) by imposing constraints on how often each node is allowed to transmit.

EEG

A Distributed Adaptive Algorithm for Node-Specific Signal Fusion Problems in Wireless Sensor Networks

no code implementations2 Nov 2022 Cem Ates Musluoglu, Alexander Bertrand

The distributed adaptive signal fusion (DASF) framework has been proposed as a generic method to solve these signal fusion problems in a distributed fashion, which reduces the communication and energy costs in the network.

A Distributed Adaptive Algorithm for Non-Smooth Spatial Filtering Problems

no code implementations27 Oct 2022 Charles Hovine, Alexander Bertrand

Computing the optimal solution to a spatial filtering problems in a Wireless Sensor Network can incur large bandwidth and computational requirements if an approach relying on data centralization is used.

Stimulus-Informed Generalized Canonical Correlation Analysis of Stimulus-Following Brain Responses

1 code implementation24 Oct 2022 Simon Geirnaert, Tom Francart, Alexander Bertrand

We show the superiority of the proposed stimulus-informed GCCA method based on the inter-subject correlation between electroencephalography responses of a group of subjects listening to the same speech stimulus, especially for lower amounts of data or smaller groups of subjects.

Brain Computer Interface

Bandwidth-efficient distributed neural network architectures with application to body sensor networks

no code implementations14 Oct 2022 Thomas Strypsteen, Alexander Bertrand

In this paper, we describe a conceptual design methodology to design distributed neural network architectures that can perform efficient inference within sensor networks with communication bandwidth constraints.

Classification EEG +1

Avoiding Post-Processing with Event-Based Detection in Biomedical Signals

1 code implementation22 Sep 2022 Nick Seeuws, Maarten De Vos, Alexander Bertrand

Methods: We propose an event-based modeling framework that directly works with events as learning targets, stepping away from ad-hoc post-processing schemes to turn model outputs into events.

Electroencephalogram (EEG) Event Detection +1

A Unified Algorithmic Framework for Distributed Adaptive Signal and Feature Fusion Problems -- Part II: Convergence Properties

1 code implementation18 Aug 2022 Cem Ates Musluoglu, Charles Hovine, Alexander Bertrand

This paper studies the convergence conditions and properties of the distributed adaptive signal fusion (DASF) algorithm, the framework itself having been introduced in a `Part I' companion paper.

A Unified Algorithmic Framework for Distributed Adaptive Signal and Feature Fusion Problems -- Part I: Algorithm Derivation

1 code implementation18 Aug 2022 Cem Ates Musluoglu, Alexander Bertrand

The proposed distributed adaptive signal fusion (DASF) algorithm is an iterative method that solves these types of problems by allowing each node to share a linearly compressed version of the local sensor signal observations with its neighbors to reduce the energy and bandwidth requirements of the network.

Grouped Variable Selection for Generalized Eigenvalue Problems

1 code implementation28 May 2021 Jonathan Dan, Simon Geirnaert, Alexander Bertrand

This group-sparsity allows, for instance, to perform sensor selection for spatio-temporal (instead of purely spatial) filters, and to select variables based on multiple generalized eigenvectors instead of only the dominant one.

Variable Selection

End-to-end learnable EEG channel selection for deep neural networks with Gumbel-softmax

no code implementations11 Feb 2021 Thomas Strypsteen, Alexander Bertrand

Many electroencephalography (EEG) applications rely on channel selection methods to remove the least informative channels, e. g., to reduce the amount of electrodes to be mounted, to decrease the computational load, or to reduce overfitting effects and improve performance.

EEG Motor Imagery

Change Point Detection in Time Series Data using Autoencoders with a Time-Invariant Representation

2 code implementations21 Aug 2020 Tim De Ryck, Maarten De Vos, Alexander Bertrand

Detectable change points include abrupt changes in the slope, mean, variance, autocorrelation function and frequency spectrum.

Change Point Detection Time Series +1

EEG-based Auditory Attention Decoding: Towards Neuro-Steered Hearing Devices

no code implementations11 Aug 2020 Simon Geirnaert, Servaas Vandecappelle, Emina Alickovic, Alain de Cheveigné, Edmund Lalor, Bernd T. Meyer, Sina Miran, Tom Francart, Alexander Bertrand

People suffering from hearing impairment often have difficulties participating in conversations in so-called `cocktail party' scenarios with multiple people talking simultaneously.

EEG Speaker Separation

EEG-informed attended speaker extraction from recorded speech mixtures with application in neuro-steered hearing prostheses

no code implementations18 Feb 2016 Simon Van Eyndhoven, Tom Francart, Alexander Bertrand

OBJECTIVE: We aim to extract and denoise the attended speaker in a noisy, two-speaker acoustic scenario, relying on microphone array recordings from a binaural hearing aid, which are complemented with electroencephalography (EEG) recordings to infer the speaker of interest.

Denoising EEG +1

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