Skip to Main content Skip to Navigation
Theses

Traitement d'antenne adapté aux modèles linéaires intégrant une interférence structurée. Application aux signaux mécaniques.

Abstract : In signal array processing or in spectral analysis the observation can be written as:

Observation = Signal Of Interest + Strucured Interference +Noise

where the structured interference is composed of a set of known or estimated parameters. We propose two approaches in signal array processing : (1) we assume dispose the prior-knowledge of M-S DOA among M and (2)
we sequentially estimate M DOA. (1) Some authors have tackled this problem by orthogonally deflate the noisy signal subspace. We give a Cramér-Rao Bound (CRB) associated with the underlying model and we show what are the limitaions of this kind of approach. Then, in order to struggle against the orthogonally deflation restrictions, we propose to use an oblique projection operator instead of the orthogonal one. Due to good performances of the algorithms proposed, we perform a theoretical variance analysis of these. (2 ) Solutions we encounter in the litterature are based on the orthogonal deflation to sequentially cancel previously estimated DOA by a MUSIC criterion. We differ from this approch to propose an algorithm , namely the ZF-MUSIC which acts on the MUSIC pseudo-spectrum by wheighting it. In order to characterize the performances we propose a CRB based on the model of 1 DOA of interest and M-1 interfering DOA. Finally, we use the algorithms proposed on real mechanical data in view to diagnostic rotating motors.
Complete list of metadata

https://tel.archives-ouvertes.fr/tel-00368248
Contributor : Guillaume Bouleux Connect in order to contact the contributor
Submitted on : Sunday, March 15, 2009 - 10:18:24 AM
Last modification on : Thursday, June 17, 2021 - 3:46:33 AM
Long-term archiving on: : Tuesday, June 8, 2010 - 11:27:26 PM

Identifiers

  • HAL Id : tel-00368248, version 1

Citation

Guillaume Bouleux. Traitement d'antenne adapté aux modèles linéaires intégrant une interférence structurée. Application aux signaux mécaniques.. Traitement du signal et de l'image [eess.SP]. Université Jean Monnet - Saint-Etienne, 2007. Français. ⟨tel-00368248⟩

Share

Metrics

Record views

174

Files downloads

903