Abstract
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.
Original language | English |
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Title of host publication | 30th European Signal Processing Conference, EUSIPCO 2022 - Proceedings |
Publisher | European Signal Processing Conference, EUSIPCO |
Pages | 50-54 |
Number of pages | 5 |
ISBN (Electronic) | 9789082797091 |
DOIs | |
State | Published - 2022 |
Externally published | Yes |
Event | 30th European Signal Processing Conference, EUSIPCO 2022 - Belgrade, Serbia Duration: 29 Aug 2022 → 2 Sep 2022 |
Publication series
Name | European Signal Processing Conference |
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Volume | 2022-August |
ISSN (Print) | 2219-5491 |
Conference
Conference | 30th European Signal Processing Conference, EUSIPCO 2022 |
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Country/Territory | Serbia |
City | Belgrade |
Period | 29/08/22 → 2/09/22 |
Bibliographical note
Publisher Copyright:© 2022 European Signal Processing Conference, EUSIPCO. All rights reserved.
Funding
This work was supported by the Pazy Research Foundation.
Funders | Funder number |
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Pazy Research Foundation |
Keywords
- Kronecker product
- Linearly constrained minimum variance (LCMV) beamformer
- broadband beamformer
- constant-beamwidth beamformer
- microphone array