Stage M2 - Robust joint detection-estimation methodologies for massive radio telescopes

2 Novembre 2023

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Catégorie : Stagiaire

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One of the key features characterizing the new generation of radio telescopes is the large number of their antenna elements. Built in 2010, the Low-Frequency Array (LOFAR) is currently the largest radio telescope in operation with 100000 antenna dipoles distributed across several European countries. Furthermore, the upcoming Square-Kilometer Array (SKA) will be made up of more than 130000 antennas. Such a large number of antennas will make it possible to acquire increasingly accurate and detailed images of the celestial vault. Such images will form the basis for promising developments in astrophysics and cosmology in the coming years.

However, as in any other remote sensing system, the signal collected by a radio telescope is affected by different sources of disturbance that will degrade the quality of the collected image. Consequently, to take full advantage of the potential of the new radio telescopes, one must first take the disturbance into account. In general, this disturbance is characterized as a zero-mean Gaussian random process with possibly unknown correlation structure.

Then, the crucial questions are:

• is it possible to derive robust imaging algorithms, without any assumption on the specific form of the noise distribution, and that still remain accurate?
• If yes, which is the price to pay?

 

Detailed information here:

https://l2s.centralesupelec.fr/wp-content/uploads/fortunati-stefano/Internship_proposal_SF_LB.pdf

and

https://l2s.centralesupelec.fr/job/robust-joint-detection-estimation-methodologies-for-massive-radio-telescopes/

 

Contact:

Stefano Fortunati, L2S, stefano.fortunati@l2s.centralesupelec.fr

Lucien Bacharach, SATIE, lucien.bacharach@universite-paris-saclay.fr