TY - GEN
T1 - CONSTANT-BEAMWIDTH LINEARLY CONSTRAINED MINIMUM VARIANCE BEAMFORMER
AU - Frank, Ariel
AU - Ben-Kish, Assaf
AU - Cohen, Israel
N1 - Publisher Copyright: © 2022 European Signal Processing Conference, EUSIPCO. All rights reserved.
PY - 2022
Y1 - 2022
N2 - In this paper, we propose a new and flexible method for designing a constant-beamwidth beamformer that maintains directional constraints. We decompose the problem by designing a linearly constrained minimum variance beamformer and a constant-beamwidth beamformer based on the window technique. Subsequently, we utilize Kronecker product beamforming to merge the two elementary beamformers. While a competing method restricts the beamwidth depending on the interelement spacing and number of sensors in the array, the proposed method enables a flexible design of an arbitrary beamwidth. Experimental results demonstrate the improved performance of the proposed approach compared to the competing method. Specifically, the proposed beamformer achieves the desired beamwidth and directional constraints with a significantly higher directivity factor and lower sidelobe levels.
AB - In this paper, we propose a new and flexible method for designing a constant-beamwidth beamformer that maintains directional constraints. We decompose the problem by designing a linearly constrained minimum variance beamformer and a constant-beamwidth beamformer based on the window technique. Subsequently, we utilize Kronecker product beamforming to merge the two elementary beamformers. While a competing method restricts the beamwidth depending on the interelement spacing and number of sensors in the array, the proposed method enables a flexible design of an arbitrary beamwidth. Experimental results demonstrate the improved performance of the proposed approach compared to the competing method. Specifically, the proposed beamformer achieves the desired beamwidth and directional constraints with a significantly higher directivity factor and lower sidelobe levels.
KW - Kronecker product
KW - Linearly constrained minimum variance (LCMV) beamformer
KW - broadband beamformer
KW - constant-beamwidth beamformer
KW - microphone array
UR - http://www.scopus.com/inward/record.url?scp=85141011571&partnerID=8YFLogxK
U2 - https://doi.org/10.23919/eusipco55093.2022.9909899
DO - https://doi.org/10.23919/eusipco55093.2022.9909899
M3 - منشور من مؤتمر
T3 - European Signal Processing Conference
SP - 50
EP - 54
BT - 30th European Signal Processing Conference, EUSIPCO 2022 - Proceedings
T2 - 30th European Signal Processing Conference, EUSIPCO 2022
Y2 - 29 August 2022 through 2 September 2022
ER -