Abstract
In this paper we present an original subspace-based method for direction finding by an array of uncalibrated isotropic sensors. This iterative method has been developed in order to estimate both direction-of-arrival of non circular signal sources and the unknown gain and phase of sensors. The non circular sources assumption, leads to an extended array data model which doubles the dimension of the observation space from the classical data model. One of the benefits of this approach is that the proposed procedure works even in the case where the number of sources is greater than the number of sensors. Some computer simulation results are provided is order to illustrate the performance of our algorithm, and to show the advantages of exploiting the non circularity of signal sources.
Résumé
Cet article présente un algorithme d’autocalibrage d’une antenne multicapteur. Cet algorithme permet d’estimer le gain et la phase des capteurs, dont la connaissance précise est nécessaire pour localiser les sources en présence. L’originalité de notre approche réside dans la prise en compte de la non-circularité des sources pour calibrer une antenne. L’exploitation de cette caractéristique permet d’augmenter la dimension de l’espace des observations, et de localiser des sources en nombre supérieur à celui des capteurs. Des simulations ont été effectuées afin de montrer la performance de cet algorithme.
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Chargé, P., Wang, Y. & Saillard, J. Joint array calibration and direction-of-arrival estimation for non circular sources. Ann. Télécommun. 57, 7–21 (2002). https://doi.org/10.1007/BF02994608
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DOI: https://doi.org/10.1007/BF02994608
Key words
- Antenna array
- Goniometry
- Multiple source
- N-dimension signal
- Random signal
- Statistical estimation
- Parameter estimation