@inproceedings{502b636d13a24710ae232c77775e2c99,
title = "Region-of-Interest Oriented Constant-Beamwidth Beamforming with Rectangular Arrays",
abstract = "This paper presents a region-of-interest (ROI) oriented constant-beamwidth (CB) beamforming approach with rectangular arrays. We decompose a global rectangular beamformer into a Kronecker-product (KP) of two linear sub-beamformers: a uniform constant-beamwidth beamformer along the y-axis and a nonuniform robust superdirective (SD) beamformer along the x-axis whose topology is optimized for a broadband array directivity criterion. The KP decomposition allows a flexible tradeoff control between the CB threshold frequency and the array directivity by tuning the number of microphones along each axis. The topology optimization considers a continuous ROI and therefore does not require an accurate desired source direction in space. The proposed approach is compared to uniform rectangular arrays with uniform differential sub-beamformers along the x-axis. We show that the proposed method is advantageous regarding white noise gain and directivity factor measures, especially when the desired source direction differs from the estimated source direction.",
keywords = "constant-beamwidth beamformer, Microphone arrays, rectangular arrays, region-of-interest beam-forming",
author = "Gal Itzhak and Israel Cohen",
note = "Publisher Copyright: {\textcopyright} 2023 IEEE.; 2023 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2023 ; Conference date: 22-10-2023 Through 25-10-2023",
year = "2023",
doi = "10.1109/WASPAA58266.2023.10248053",
language = "الإنجليزيّة",
series = "IEEE Workshop on Applications of Signal Processing to Audio and Acoustics",
booktitle = "Proceedings of the 2023 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2023",
}