Paper Info
Title
ON THE DESIGN OF SQUARE DIFFERENTIAL MICROPHONE ARRAYS WITH A MULTISTAGE STRUCTURE
Abstract
This paper studies the problem of designing square differential microphone arrays (SDMAs). It presents a multistage approach, which first divides an SDMA composed of M-2 microphones into (M - 1)(2) subarrays with each subarray being a 2 x 2 square array formed by four adjacent microphones. Then, differential beamforming is performed with each subarray in the first-stage. The first-stage differential beamformers' outputs are subsequently used as the inputs of the second stage to form (M - 2)(2) subarrays and a second-stage differential beamforming is then performed. Continuing this process till the (M- 1)th stage, we obtain the final output of the SDMA. The SDMA designed in such a multistage structure has two important properties. First, the global weighting matrix is equal to the two dimensional convolution of weighting matrices from the first stage to the last one. Second, the global beampattern is equal to the product of beampatterns from all stages. Consequently, we can combine different kinds of beamformers in different stages and have better control of the performance metrics.
Year
DOI
Venue
2021
10.1109/ICASSP39728.2021.9413759
2021 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP 2021)
Keywords
DocType
Citations 
Microphone arrays, square arrays, differential beamforming, multistage structure, frequency invariance
Conference
0
PageRank 
References 
Authors
0.34
12
5
Name
Order
Citations
PageRank
Xudong Zhao131.08
Gongping Huang27613.39
Jacob Benesty31386136.42
Jingdong Chen41460128.79
Israel Cohen51734121.85