Time-domain dimensionality reduction design of polynomial wideband beamformer for circular microphone array

被引：0
|
作者：
Zhang Z. [1 ]
Chen H. [1 ]
Feng C. [1 ]
机构：
[1] Nanjing University of Aeronautics and Astronautics, College of Electronic and Information Engineering, Nanjing
来源：
Shengxue Xuebao/Acta Acustica | 2024年 / 49卷 / 03期
关键词：
Alternating direction method of multipliers; Array symmetry; Circular microphone array; Polynomial beamformer; Wideband beamforming;
D O I：
10.12395/0371-0025.2022194
中图分类号：
学科分类号：
摘要：
The existing frequency-domain polynomial wideband beamformer (PWB) design for circular microphone arrays (CMAs) degrades significantly for short filter tap length due to the effect of the fitting error. To deal with the problem, this paper proposes a highly efficient time-domain dimensionality reduction design approach. Firstly, a symmetry property of the weight coefficients of the PWB for CMAs is theoretically derived. Then a reduced-dimensional form for the time-domain PWB design is deduced by deleting nearly half of the redundant beamformer weight coefficients. Next, an efficient approach is proposed to solve the dimensionality reduction design optimization using the alternating direction method of multipliers. The proposed design outperforms its existing frequency-domain counterpart for short filter tap length, and is also superior for improving the design efficacy. © 2024 Science Press. All rights reserved.
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页码：587 / 597
页数：10
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