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Communication Dans Un Congrès Année : 2014

RFI spatial processing at nancay observatory : Approaches and experiments

Résumé

Because of the denser active use of the spectrum, and because of higher radio telescope sensitivities, radio frequency interference (RFI) mitigation has become a sensitive topic for current and future radio telescope designs. In this paper, we consider different interference mitigation options which take advantage of both time-frequency and spatial RFI signatures. After specific subspace decompositions, these RFI spatial signatures are estimated and applied to pre- or post-correlation data by means of spatial filtering techniques based on projectors. We provide some performance analysis through simulations and Cramer-Rao Lower Bound derivations. In addition, recent results on real data from the LOFAR and EMBRACE radio telescopes are presented.
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Dates et versions

hal-01096933 , version 1 (18-12-2014)

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Gregory Hellbourg, Rodolphe Weber, Karim Abed-Meraim, Albert-Jan Boonstra,. RFI spatial processing at nancay observatory : Approaches and experiments. 2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), May 2014, Florence, Italy. pp.285-289, ⟨10.1109/ICASSP.2014.6854632⟩. ⟨hal-01096933⟩
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