Research

Talks

  • Efficient and RFI-Robust Interferometric Imaging: Dynamic Antenna Switching, Models, and EM Algorithms
    (Vers une imagerie interférométrique efficiente et robuste aux RFI : commutations dynamiques d’antennes, modèles et algorithmes EM)
    Technical Webinar Series of the Joint Laboratory ECLAT, September 12, 2025
    Webinar page • Recording

  • Deep Learning Methods for Antenna Selection in Radio Imaging via Subarray Switching
    (Méthode d’apprentissage profond pour la sélection d’antennes en imagerie radio par commutation de sous-réseaux)
    ANR PerDRIX Project Meeting, ENS Paris-Saclay, January 6, 2025

  • EM Algorithms for Interferometric Imaging with Subarray Switching
    (Algorithmes EM pour l’imagerie interférométrique avec commutations de sous-réseaux d’antennes)
    Research Topic Day “State of the Art of Inversion Methods in Astronomy and Upcoming Challenges” (“État des lieux des méthodes d’inversion en astronomie et challenges à venir”),
    organized by GdR-IASIS, Paris-Saclay University, June 20, 2024
    Event page

Participated Conferences

  • “Commutations de sous-réseaux par apprentissage pour une imagerie radio interférométrique efficiente” (slides)
    • Presented at: Group Recherche Traitement Signal Images (GRETSI), 2025
    • Location: Strasbourg, France
  • “Antenna Sub-Array Switching Strategy for Low-Cost & High-Resolution Radio-Astronomical Imaging”
    • Presented at: IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC), 2023
    • Location: Zhengzhou, China
  • “Barankin Bound vs Cramér-Rao Bound for Interferometric-Like Array Design at Low SNR”
    • Presented at: 31st European Signal Processing Conference (EUSIPCO), 2023
    • Location: Helsinki, Finland
  • “Borne Barankin vs Borne Cramér-Rao pour la Géométrie de Réseaux d’Antennes en Radioastronomie”
    • Presented at: Group Recherche Traitement Signal Images (GRETSI), 2023
    • Location: Grenoble, France

Reviewing Activities

  • IEEE Transactions on Fuzzy Systems
  • Aerospace Science and Technology
  • Robotics and Autonomous Systems

Participated Project

AAPG2024: Performance and Design of Radio Interferometers with large eXtent (PerDRIX)

Lucien BACHARACH, Pascal LARZABAL, Isabelle VIN, Jianhua WANG, Gilles CHARDON, Julien GIRARD

From July 2024 (48 months)

Objectives:

  • Derive natural and meaningful estimation accuracy measures for the imaging task in radio astronomy.
  • Propose useful optimization criteria and algorithms for the array configuration of radio interferometers, based on the aforementioned imaging accuracy measures.
  • Apply the proposed tools to practical radio interferometer use cases: optimization of a whole radio interferometer array configuration, but also design of observations and optimal observation resource allocation (e.g. optimal sub-arraying) on existing facilities.