Borne de Cramér-Rao pour la conception de réseaux de capteurs en présence des sources dispersées

Abstract : In array signal processing the signals impinging on the array are often assumed to come from point sources. However, in some applications, for example, in aero-acoustic imaging [1], the angular dispersion is no longer negligible and a model for distributed sources could be more appropriate. In this paper, focusing on the distributed source model, we derive an approximated expression of the Cramér-Rao bound in the case of one distributed source. In addition, we find that the component of the inter-correlation of the direction of arrival and the angular dispersion parameter of the source can be canceled by some particular geometries of the antenna array. The simulation results validate the theoretical results.
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Wenmeng Xiong, José Picheral, Sylvie Marcos. Borne de Cramér-Rao pour la conception de réseaux de capteurs en présence des sources dispersées. 25eme Colloque GRETSI 2015, Sep 2015, Lyon, France. ⟨hal-01235086⟩

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