NDLI: Algorithme de calibration robuste dans un contexte de radio interférométrie

Please wait, while we are loading the content...

Algorithme de calibration robuste dans un contexte de radio interférométrie

Content Provider	Semantic Scholar
Author	Ollier, Virginie Korso, Mohammed Nabil El Boyer, Rémy Larzabal, Pascal Pesavento, Marius
Copyright Year	2017
Abstract	Ce travail s'inscrit dans le contexte de la radio interferometrie ou la calibration consiste a estimer les perturbations subies par le signal depuis son emission par une source jusqu'a sa reception par le reseau d'antennes. Pour tenir compte de la presence de valeurs aberrantes contribuant au bruit, nous modelisons ce dernier par un processus non Gaussien, un PAIS (processus aleatoire a invariance spherique). Nous comparons l'algorithme iteratif propose base sur le maximum de vraisemblance, pour lequel des expressions analytiques permettent d'estimer les parametres inconnus, avec des techniques de calibration traditionnelles. Abstract – In radio interferometry, calibration amounts to estimate all the perturbation effects introduced along the signal propagation path until reception by the antenna array. In order to take into account outliers, we choose to model the noise by a non-Gaussian process, specifically by a SIRP (spherically invariant random process). We compare the proposed iterative algorithm based on the maximum likelihood estimator, where closed-form expressions are obtained, with state-of-the art calibration techniques.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://hal-centralesupelec.archives-ouvertes.fr/hal-01568174/file/gretsi_1.pdf
Alternate Webpage(s)	https://hal-centralesupelec.archives-ouvertes.fr/hal-01568174/document
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

Central Library (ISO-9001:2015 Certified)
Indian Institute of Technology Kharagpur
Kharagpur, West Bengal, India | PIN - 721302

See location in the Map
03222 282435
Mail: support@ndl.gov.in

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in