ON THE DESIGN OF ROBUST DIFFERENTIAL BEAMFORMERS WITH UNIFORM CIRCULAR MICROPHONE ARRAYS

Xueqin Luo, Gongping Huang, Jingdong Chen, Jacob Benesty

科研成果: 书/报告/会议事项章节会议稿件同行评审

3 引用 (Scopus)

摘要

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.

源语言英语
主期刊名31st European Signal Processing Conference, EUSIPCO 2023 - Proceedings
出版商European Signal Processing Conference, EUSIPCO
1-5
页数5
ISBN(电子版)9789464593600
DOI
出版状态已出版 - 2023
活动31st European Signal Processing Conference, EUSIPCO 2023 - Helsinki, 芬兰
期限: 4 9月 20238 9月 2023

出版系列

姓名European Signal Processing Conference
ISSN(印刷版)2219-5491

会议

会议31st European Signal Processing Conference, EUSIPCO 2023
国家/地区芬兰
Helsinki
时期4/09/238/09/23

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