Paper Info
Title
ROBUST STEERABLE DIFFERENTIAL BEAMFORMERS WITH NULL CONSTRAINTS FOR CONCENTRIC CIRCULAR MICROPHONE ARRAYS
Abstract
Differential beamformers with concentric circular microphone arrays (CCMAs) are desirable for use in various applications since they can form frequency-invariant spatial responses, have better beam steering flexibility than linear arrays, and suffer less with beampattern irregularity and white noise amplification than circular microphone arrays (CMAs). The methods developed previously for differential beamforming with CCMAs are based on the series expansion. Such methods need to know the analytic form of the target beampattern, which may not be accessible in practice. Furthermore, expansion error may lead to erroneous solution, which can cause noise amplification instead of reduction. In this paper, we extend our recently developed beamforming method for CMAs to the design of differential beamformers with CCMAs, which takes advantage of the symmetric null constraints from the beampattern. Simulations are performed to justify the properties of the proposed approach.
Year
DOI
Venue
2021
10.1109/ICASSP39728.2021.9414119
2021 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP 2021)
Keywords
DocType
Citations 
Microphone arrays, differential beamforming, concentric circular microphone arrays, frequency-invariant beampattern
Conference
0
PageRank 
References 
Authors
0.34
11
5
Name
Order
Citations
PageRank
Xue-Han Wang1233.14
Gongping Huang27613.39
Israel Cohen31734121.85
Jacob Benesty41386136.42
Jingdong Chen51460128.79