TY - GEN
T1 - Asymmetric beampatterns with circular differential microphone arrays
AU - Buchris, Yaakov
AU - Cohen, Israel
AU - Benesty, Jacob
N1 - Publisher Copyright: © 2017 IEEE.
PY - 2017/12/7
Y1 - 2017/12/7
N2 - Circular differential microphone arrays (CDMAs) facilitate compact superdirective beamformers whose beampatterns are nearly frequency invariant, and allow perfect steering for all azimuthal directions. Herein, we eliminate the inherent limitation of symmetric beampatterns associated with a linear geometry, and introduce an analytical asymmetric model for Nth-order CDMAs. We derive the theoretical asymmetric beampattern, and develop the asymmetric supercardioid. In addition, an Nth-order CDMAs design is presented based on the mean-squared-error (MSE) criterion. Experimental results show that the proposed model yields optimal performance in terms of white noise gain, directivity factor, and front-to- back ratio, as well as more flexible nulls design for the interfering signals.
AB - Circular differential microphone arrays (CDMAs) facilitate compact superdirective beamformers whose beampatterns are nearly frequency invariant, and allow perfect steering for all azimuthal directions. Herein, we eliminate the inherent limitation of symmetric beampatterns associated with a linear geometry, and introduce an analytical asymmetric model for Nth-order CDMAs. We derive the theoretical asymmetric beampattern, and develop the asymmetric supercardioid. In addition, an Nth-order CDMAs design is presented based on the mean-squared-error (MSE) criterion. Experimental results show that the proposed model yields optimal performance in terms of white noise gain, directivity factor, and front-to- back ratio, as well as more flexible nulls design for the interfering signals.
KW - Circular differential microphone arrays
KW - asymmetric beampatterns
KW - broadband beamforming
KW - supercardioid
UR - http://www.scopus.com/inward/record.url?scp=85042388143&partnerID=8YFLogxK
U2 - https://doi.org/10.1109/WASPAA.2017.8170021
DO - https://doi.org/10.1109/WASPAA.2017.8170021
M3 - منشور من مؤتمر
T3 - IEEE Workshop on Applications of Signal Processing to Audio and Acoustics
SP - 190
EP - 194
BT - 2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017
T2 - 2017 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2017
Y2 - 15 October 2017 through 18 October 2017
ER -