Calibration of Radio Interferometers Using a Sparse DoA Estimation Framework
| العنوان: | Calibration of Radio Interferometers Using a Sparse DoA Estimation Framework |
|---|---|
| المؤلفون: | M. N. El Korso, Remy Boyer, Marius Pesavento, Martin Brossard, Pascal Larzabal |
| المساهمون: | Laboratoire Energétique Mécanique Electromagnétisme (LEME), Université Paris Nanterre (UPN), Darmstadt University of Technology [Darmstadt], Laboratoire des signaux et systèmes (L2S), Université Paris-Sud - Paris 11 (UP11)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Systèmes et Applications des Technologies de l'Information et de l'Energie (SATIE), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École normale supérieure - Rennes (ENS Rennes)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | 24th European Signal Processing Conference (EUSIPCO) 24th European Signal Processing Conference (EUSIPCO), Aug 2016, Budapest, Hungary. ⟨10.1109/eusipco.2016.7760253⟩ EUSIPCO |
| بيانات النشر: | HAL CCSD, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Computer science, Calibration (statistics), Perspective (graphical), FOS: Physical sciences, 020206 networking & telecommunications, 02 engineering and technology, Sparse approximation, 01 natural sciences, Noise, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Astronomical interferometer, Ondes ElectroMagnétiques, Matériaux et Systèmes, Astrophysics - Instrumentation and Methods for Astrophysics, 010303 astronomy & astrophysics, Algorithm, Instrumentation and Methods for Astrophysics (astro-ph.IM), ComputingMilieux_MISCELLANEOUS |
| الوصف: | The calibration of modern radio interferometers is a significant challenge, specifically at low frequencies. In this perspective, we propose a novel iterative calibration algorithm, which employs the popular sparse representation framework, in the regime where the propagation conditions shift dissimilarly the directions of the sources. More precisely, our algorithm is designed to estimate the apparent directions of the calibration sources, their powers, the directional and undirectional complex gains of the array elements and their noise powers, with a reasonable computational complexity. Numerical simulations reveal that the proposed scheme is statistically efficient at low SNR and even with additional non-calibration sources at unknown directions. 5 pages, 2 figures, conference |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::91e4e95f3c183306bdbb50f672c88b8a |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....91e4e95f3c183306bdbb50f672c88b8a |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |