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Dive into the research topics where Cedric Dumez-Viou is active.

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Featured researches published by Cedric Dumez-Viou.


arXiv: Instrumentation and Methods for Astrophysics | 2016

Multi-Level Pre-Correlation RFI Flagging for Real-Time Implementation on UniBoard

Cedric Dumez-Viou; Rodolphe Weber; Philippe Ravier

Because of the denser active use of the spectrum, and because of radio telescopes higher sensitivity, radio frequency interference (RFI) mitigation has become a sensitive topic for current and future radio telescope designs. Even if quite sophisticated approaches have been proposed in the recent years, the majority of RFI mitigation operational procedures are based on post-correlation corrupted data flagging. Moreover, given the huge amount of data delivered by current and next generation radio telescopes, all these RFI detection procedures have to be at least automatic and, if possible, real-time. In this paper, the implementation of a real-time pre-correlation RFI detection and flagging procedure into generic high-performance computing platforms based on field programmable gate arrays (FPGA) is described, simulated and tested. One of these boards, UniBoard, developed under a Joint Research Activity in the RadioNet FP7 European programme is based on eight FPGAs interconnected by a high speed transceiver ...


Proceedings of RFI mitigation workshop — PoS(RFI2010) | 2010

RFI mitigation at Nançay Observatory: Impulsive Signal Processing

Dalal Ait-Allal; Rodolphe Weber; Cedric Dumez-Viou

Radio astronomy has protected frequency bands for free observations. However, it is often necessary to observe outside of those sanctuaries. For example, it is the case for HI radio-sources with high red-shifts that are observed into radarallocated frequency bands. A radar pulse blanker based on statistical analysis has been implemented in a FPGA. Several tricks has made the implementation possible at a low hardware cost. Pulsar is another kind of impulsive signal which needs specific processing. In the proposed approach, the cyclostationarity is used to discriminate between radio-frequency interference (RFI) pulses and pulsar pulses.


Proceedings of Wide Field Astronomy & Technology for the Square Kilometre Array — PoS(SKADS 2009) | 2011

RFI mitigation at Nancay Observatory: Impulsive Signal Processing

Dalal Ait-Allal; Cedric Dumez-Viou; Rodolphe Weber; G. Desvignes; I. Cognard; G. Theureau

Radio astronomy has protected frequency bands for free observations. However, it is often necessary to observe outside of those sanctuaries. For example, it is the case for HI radio-sources with high red-shifts that are observed into radarallocated frequency bands. A radar pulse blanker based on statistical analysis has been implemented in a FPGA. Several tricks has made the implementation possible at a low hardware cost. Pulsar is another kind of impulsive signal which needs specific processing. In the proposed approach, the cyclostationarity is used to discriminate between radio-frequency interference (RFI) pulses and pulsar pulses.


Proceedings of Wide Field Astronomy & Technology for the Square Kilometre Array — PoS(SKADS 2009) | 2011

RFI mitigation: cyclostationary criterion

Rym Feliachi; Cedric Dumez-Viou; Rodolphe Weber; Albert-Jan Boonstra

Radio astronomical observations are increasingly corrupted by radio frequency interferences. Thus, real- time ltering algorithms are becoming essential. One approach is to use a speci c time property of the Telecoms signals : the cyclostationarity. This property can be exploited for detection purpose or ltering purpose. In par- ticular, new generations of radio telescopes will be based on antenna arrays providing the possibility of applying spatial ltering techniques. In this paper, we compare the performance between classical approaches based on power statistics and cyclic approaches. This comparison is done through simulations on synthetic data and through simulations on real data acquired with the new generation low frequency array radio telescope, LOFAR.


Comptes Rendus Physique | 2012

Blind detection of giant pulses: GPU implementation

Dalal Ait-Allal; Rodolphe Weber; Cedric Dumez-Viou; I. Cognard; G. Theureau


european signal processing conference | 2010

RFI mitigation implementation for pulsar radioastronomy

Dalal Ait-Allal; Rodolphe Weber; Cedric Dumez-Viou; I. Cognard; G. Theureau


Les Journées Scientifiques d'URSI-France L'électromagnétisme, | 2013

RFI Mitigation in Radio Astronomy: an Overview

Rodolphe Weber; Gregory Hellbourg; Cedric Dumez-Viou; Albert-Jan Boonstra; S. Torchinsky; Cécile Capdessus; Karim Abed-Meraim


european signal processing conference | 2005

Robust mean estimation for real-time blanking in radioastronomy

Philippe Ravier; Cedric Dumez-Viou


La Revue de l'Electricité et de l'Electronique | 2012

Exemples de traitement en temps réel des interférences radioélectriques pour la radioastronomie

Rodolphe Weber; Cedric Dumez-Viou; Samar Changuel; Dalal Ait-Allal


Journées Scientifiques 2011 | 2011

Détection Aveugle de Pulses Géants : Implantation sur GPU

Dalal Ait-Allal; Rodolphe Weber; Cedric Dumez-Viou; I. Cognard; G. Theureau

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G. Theureau

University of Orléans

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I. Cognard

University of Orléans

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