A Spectral Identiy Card

Corinne Mailhes (1, 2) , Nadine Martin (3) , Kheira Sahli (3) , Gérard Lejeune (3)

1 IRIT-SC - Signal et Communications
2 Toulouse INP - Institut National Polytechnique (Toulouse)
3 LIS - Laboratoire des images et des signaux

This paper studies a new spectral analysis strategy for detecting, characterizing and classifying spectral structures of an unknown stationary process. The spectral structures we consider are defined as sinusoidal waves, narrow band signals or noise peaks. A sum of an unknown number of these structures is embedded in an unknown colored noise. The proposed methodology provides a way to calculate a spectral identity card, which features each of these spectral structures, similarly to a real I.D. The processing is based on a local Bayesian hypothesis testing, which is defined in frequency and which takes account of the noise spectrum estimator. Thanks to a matching with the corresponding spectral window, each I.D. card permits the classification of the associated spectral structure into one of the following four classes: Pure Frequency, Narrow Band, Alarm and Noise. Each I.D. card is actually the result of the fusion of intermediate cards, obtained from complementary spectral analysis methods.

Mots clés: Spectral analysis; power spectral density; spectral window; detection; interpretation; fusion; decision; classification; noise spectrum; stationary signals; pure frequencies; colored noise; acoustic and vibratory signals

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Corinne Mailhes, Nadine Martin, Kheira Sahli, Gérard Lejeune. A Spectral Identiy Card. EUropean SIgnal Processing Conference, EUSIPCO 06, Sep 2006, Florence, Italy. ⟨hal-00263811⟩