Title :
Design of robust polynomial beamformers for symmetric arrays
Author :
Mabande, Edwin ; Buerger, Michael ; Kellermann, Walter
Author_Institution :
Multimedia Commun. & Signal Process., Univ. of Erlangen-Nuremberg, Erlangen, Germany
Abstract :
Polynomial broadband beamforming designs enable an easy, smooth, and dynamic steering of the main beam. A number of design methods based on constrained optimization have been proposed recently which allow for the control of the robustness of these designs. Of course, the addition of robustness constraints reduces the number of degrees of freedom of the design. In this paper, we present a method to enhance the spatial selectivity of the robust polynomial beamformer design by exploiting the structure of symmetric arrays while still satisfying the robustness constraints. The effectiveness of this method is shown in design examples for symmetric linear and circular arrays.
Keywords :
array signal processing; beam steering; optimisation; polynomials; circular arrays; constrained optimization; degrees of freedom; dynamic beam steering; robust polynomial broadband beamforming designs; symmetric array structure; symmetric linear array; Acoustics; Array signal processing; Microphones; Polynomials; Robustness; Sensor arrays; Robust Polynomial Beamformer; Symmetric Arrays;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2012 IEEE International Conference on
Conference_Location :
Kyoto
Print_ISBN :
978-1-4673-0045-2
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2012.6287802