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Annales Des Télécommunications

, Volume 62, Issue 9–10, pp 1171–1184 | Cite as

Decoupled estimation of angular parameters for coherently distributed sources

  • Ahmed Zoubir
  • Yide Wang
  • Mohamed M. Ould Haiballa
  • Pascal Chargé
Article
  • 67 Downloads

Abstract

In this paper, we consider the problem of estimating the direction-of-arrivals (doas) and angular spreads of uncorrelated coherently distributed sources. The proposed methods enable a decoupled estimation of the doas from that of the angular spreads of sources. Compared with existing algorithms, the proposed algorithms improve the robustness to the mismodeling of the spatial distribution of the scatterers. They allow an unambiguous doas estimation and don’t need the a priori knowledge of the azimutal power distribution. Furthermore, the proposed techniques work even in the case where the different sources have different angular distribution shape.

Key words

Antenna array Beamforming Linear antenna Arrival angle Spatial distribution Multipath propagation Wave coherence 

Estimation découplée des paramètres angulaires pour des sources distribuées avec cohérence

Résumé

Dans cet article on considère le problème d’estimation des directions d’arrivée (dda) et des étalements angulaires de sources décorrélées distribuées avec cohérence. Les techniques proposées permettent d’estimer ces paramètres angulaires de façon séparée. Par comparaison avec des techniques existantes, ces nouvelles méthodes n’exigent pas la connaissance des distributions angulaires des réflecteurs, en particulier pour l’estimation des dda. Notons que ces méthodes sont capables de fonctionner lorsque les différentes sources ont des distributions azimutales différentes, contrairement aux méthodes existantes.

Mots clés

Antenne réseau Mise forme faisceau Antenne rectiligne Angle arrivée Distribution spatiale Propagation trajet multiple Cohérence onde 

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Copyright information

© Institut Telecom / Springer-Verlag France 2007

Authors and Affiliations

  • Ahmed Zoubir
    • 1
  • Yide Wang
    • 2
  • Mohamed M. Ould Haiballa
    • 1
    • 2
  • Pascal Chargé
    • 3
  1. 1.IREENA École polytechniqueUniversity of NantesNantesFrance
  2. 2.SSC, FSTUniversity of Sidi Mohamed Ben AbdellahFezMorocco
  3. 3.LATTIS, INSAToulouse Cedex 4France

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