Modal beamforming for small circular arrays of particle velocity sensors. Gur, B. In 2017 25th European Signal Processing Conference (EUSIPCO), pages 390-394, Aug, 2017.
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Paper doi abstract bibtex
Paper doi abstract bibtex Vector sensors are directional receivers that measure the vectorial particle velocity associated with an acoustic wave rather than the scalar pressure. Therefore, arrays of vector sensors possess some desirable directional properties compared to conventional arrays of pressure sensors. In this paper, a modal beamformer for circular arrays of 1-D acoustic vectors sensors are presented. Arrays of both radially and circumferentially oriented vector sensors are considered. It is shown that the highly directional modes of the acoustic velocity field can be extracted from the sensor measurements using the spatial Fourier transform. These modes are weighted and combined to form narrow steerable beams. The highest order of mode that can be extracted is limited by the number of vector sensors utilized in the array. Theoretical analysis and numerical simulations indicate that the proposed modal beamformer attains the same directivity performance as that of circular pressure sensor array beamformers but outperforms them in terms of white noise gain. In addition, it uses half the number of sensors to achieve the same directivity performance of a circular vector sensor array modal beamformer reported previously in the literature. The proposed method is suitable for in-air and underwater low frequencies array processing applications.
@InProceedings{8081235,
author = {B. Gur},
booktitle = {2017 25th European Signal Processing Conference (EUSIPCO)},
title = {Modal beamforming for small circular arrays of particle velocity sensors},
year = {2017},
pages = {390-394},
abstract = {Vector sensors are directional receivers that measure the vectorial particle velocity associated with an acoustic wave rather than the scalar pressure. Therefore, arrays of vector sensors possess some desirable directional properties compared to conventional arrays of pressure sensors. In this paper, a modal beamformer for circular arrays of 1-D acoustic vectors sensors are presented. Arrays of both radially and circumferentially oriented vector sensors are considered. It is shown that the highly directional modes of the acoustic velocity field can be extracted from the sensor measurements using the spatial Fourier transform. These modes are weighted and combined to form narrow steerable beams. The highest order of mode that can be extracted is limited by the number of vector sensors utilized in the array. Theoretical analysis and numerical simulations indicate that the proposed modal beamformer attains the same directivity performance as that of circular pressure sensor array beamformers but outperforms them in terms of white noise gain. In addition, it uses half the number of sensors to achieve the same directivity performance of a circular vector sensor array modal beamformer reported previously in the literature. The proposed method is suitable for in-air and underwater low frequencies array processing applications.},
keywords = {array signal processing;Fourier transforms;particle velocity analysis;pressure sensors;sensor arrays;underwater acoustic communication;underwater low frequencies array processing applications;particle velocity sensors;directional receivers;vectorial particle velocity;radially oriented vector sensors;circumferentially oriented vector sensors;circular pressure sensor array beamformers;circular vector sensor array modal beamformer;1D acoustic vectors sensors;vector sensors;pressure sensor arrays;spatial Fourier transform;Sensor arrays;Acoustics;Velocity measurement;Acoustic arrays;Pressure sensors;Array signal processing},
doi = {10.23919/EUSIPCO.2017.8081235},
issn = {2076-1465},
month = {Aug},
url = {https://www.eurasip.org/proceedings/eusipco/eusipco2017/papers/1570347472.pdf},
}Downloads: 0
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It is shown that the highly directional modes of the acoustic velocity field can be extracted from the sensor measurements using the spatial Fourier transform. These modes are weighted and combined to form narrow steerable beams. The highest order of mode that can be extracted is limited by the number of vector sensors utilized in the array. Theoretical analysis and numerical simulations indicate that the proposed modal beamformer attains the same directivity performance as that of circular pressure sensor array beamformers but outperforms them in terms of white noise gain. In addition, it uses half the number of sensors to achieve the same directivity performance of a circular vector sensor array modal beamformer reported previously in the literature. 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Gur},\n booktitle = {2017 25th European Signal Processing Conference (EUSIPCO)},\n title = {Modal beamforming for small circular arrays of particle velocity sensors},\n year = {2017},\n pages = {390-394},\n abstract = {Vector sensors are directional receivers that measure the vectorial particle velocity associated with an acoustic wave rather than the scalar pressure. Therefore, arrays of vector sensors possess some desirable directional properties compared to conventional arrays of pressure sensors. In this paper, a modal beamformer for circular arrays of 1-D acoustic vectors sensors are presented. Arrays of both radially and circumferentially oriented vector sensors are considered. It is shown that the highly directional modes of the acoustic velocity field can be extracted from the sensor measurements using the spatial Fourier transform. These modes are weighted and combined to form narrow steerable beams. 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