• Robust supergain beamforming f...

Treffer: Robust supergain beamforming for circular array via second-order cone programming

Title:
Robust supergain beamforming for circular array via second-order cone programming
Authors:
SHEFENG YAN, YUANLIANG MA
Source:
Applied Acoustics. 66(9):1018-1032
Publisher Information:
Oxford: Elsevier, 2005.
Publication Year:
2005
Physical Description:
print, 13 ref
Original Material:
INIST-CNRS
Subject Terms:
Mechanics acoustics, Mécanique et acoustique, Sciences exactes et technologie, Exact sciences and technology, Physique, Physics, Domaines classiques de la physique (y compris les applications), Fundamental areas of phenomenology (including applications), Acoustique, Acoustics, Acoustique sous-marine, Underwater sound, Acoustique sous marine, Underwater acoustics, Acústica submarina, Bruit blanc, White noise, Ruido blanco, Description système, System description, Descripción sistema, Evaluation performance, Performance evaluation, Evaluación prestación, Formation voie, Beam forming, Formación haz, Forme circulaire, Circular shape, Forma circular, Gain, Ganancia, Méthode calcul, Computing method, Método cálculo, Ordre 2, Second order, Orden 2, Réseau(arrangement), Array, Red, Simulation numérique, Numerical simulation, Simulación numérica, Technique programmation, Programmation technique, Técnica programación, Robust beamforming: Supergain: Second-order cone programming
Document Type:
Fachzeitschrift Article
File Description:
text
Language:
English
Author Affiliations:
Institute of Acoustic Engineering, Northwestern Polytechnical University, Xi'an 710072, China
ISSN:
0003-682X
Access URL:
http://pascal-francis.inist.fr/vibad/index.php?action=search&terms=16914798
Rights:
Copyright 2005 INIST-CNRS
CC BY 4.0
Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
Notes:
Physics: acoustics
Accession Number:
edscal.16914798
Database:
PASCAL Archive

Weitere Informationen

The phenomenon of supergain for a circular array and its robust beamforming are presented. The coplanar superdirective array gain of the circular array, although it is not so extreme as an endfire line array, outperforms a lot over that of a conventional delay-and-sum beamformer in isotropic noise fields when the inter-element spacings are much smaller than one-half wavelength. However, optimum beamforming algorithms can be extremely sensitive to slight errors in array characteristics. The performance are known to degrade significantly if some of underlying assumptions on the sensor array is violated. Therefore, white noise gain constraint is used to improve the robustness of the supergain beamformer against random errors. We show that the design of the weight vector of robust supergain beamformer can be reformulated as a form of second-order cone programming and resolved efficiently via the well-established interior point method. Results of computer simulation for a 24-element circular array confirm satisfactory performance of the approach proposed in this paper.