Title :
An alternative implementation of the superdirective beamformer
Author :
Bitzer, Joerg ; Kammeyer, Karl-Dirk ; Simmer, Klaus Uwe
Author_Institution :
Dept. of Telecommun., Bremen Univ., Germany
Abstract :
We introduce a new implementation of superdirective beamformers. The new structure has the advantage of reduced computational complexity. This advantage is due to a GSC-like (generalized sidelobe canceller) scheme. Unlike the conventional GSC, the filters in the sidelobe cancelling path are fixed and can be computed in advance by using the Wiener solution. The new structure yields exactly the same noise reduction performance as the superdirective beamformer does
Keywords :
Wiener filters; adaptive signal processing; array signal processing; computational complexity; filtering theory; microphones; speech enhancement; Wiener solution; fixed filters; generalized sidelobe canceller; noise reduction performance; omnidirectional microphones; reduced computational complexity; sensors; speech enhancement; superdirective beamformer; Acoustic noise; Acoustic sensors; Adaptive arrays; Delay; Filters; Noise reduction; Signal to noise ratio; Speech enhancement; Speech processing; Telecommunication computing;
Conference_Titel :
Applications of Signal Processing to Audio and Acoustics, 1999 IEEE Workshop on
Conference_Location :
New Paltz, NY
Print_ISBN :
0-7803-5612-8
DOI :
10.1109/ASPAA.1999.810836
