TY - GEN
T1 - ON THE DESIGN OF ROBUST DIFFERENTIAL BEAMFORMERS WITH UNIFORM CIRCULAR MICROPHONE ARRAYS
AU - Luo, Xueqin
AU - Huang, Gongping
AU - Chen, Jingdong
AU - Benesty, Jacob
N1 - Publisher Copyright:
© 2023 European Signal Processing Conference, EUSIPCO. All rights reserved.
PY - 2023
Y1 - 2023
N2 - While circular microphone arrays (CMAs) have been used in a wide range of applications, e.g., smart speakers and conferencing phones, how to design robust beamformers that can obtain the highest possible directivity with such arrays remains a challenging issue. In this paper, we study this problem and present a method to design robust differential beamformers based on uniform CMAs (UCMAs). The approach casts the differential beamforming problem into one of optimization, which attempts to maximize the directivity factor (DF) subject to some constraints on symmetric nulls in the beampattern and the white noise gain (WNG). The robust beamformers are obtained by transforming the optimization problem into a quadratic eigenvalue problem (QEP). Simulation results show that the deduced beamformers can obtain high DFs and consistent beampatterns, regardless of the steering angle, and the WNG is effectively controlled to be larger than a pre-specified threshold.
AB - While circular microphone arrays (CMAs) have been used in a wide range of applications, e.g., smart speakers and conferencing phones, how to design robust beamformers that can obtain the highest possible directivity with such arrays remains a challenging issue. In this paper, we study this problem and present a method to design robust differential beamformers based on uniform CMAs (UCMAs). The approach casts the differential beamforming problem into one of optimization, which attempts to maximize the directivity factor (DF) subject to some constraints on symmetric nulls in the beampattern and the white noise gain (WNG). The robust beamformers are obtained by transforming the optimization problem into a quadratic eigenvalue problem (QEP). Simulation results show that the deduced beamformers can obtain high DFs and consistent beampatterns, regardless of the steering angle, and the WNG is effectively controlled to be larger than a pre-specified threshold.
KW - differential beamforming
KW - directivity factor
KW - quadratic eigenvalue problem
KW - Uniform circular arrays
KW - white noise gain
UR - http://www.scopus.com/inward/record.url?scp=85178382609&partnerID=8YFLogxK
U2 - 10.23919/EUSIPCO58844.2023.10289970
DO - 10.23919/EUSIPCO58844.2023.10289970
M3 - 会议稿件
AN - SCOPUS:85178382609
T3 - European Signal Processing Conference
SP - 1
EP - 5
BT - 31st European Signal Processing Conference, EUSIPCO 2023 - Proceedings
PB - European Signal Processing Conference, EUSIPCO
T2 - 31st European Signal Processing Conference, EUSIPCO 2023
Y2 - 4 September 2023 through 8 September 2023
ER -