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A higher-order “figure-8” sensor and an isotropic sensor—For azimuth-elevation bivariate direction finding.

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Title: A higher-order “figure-8” sensor and an isotropic sensor—For azimuth-elevation bivariate direction finding.
Authors: Muaz, Muhammad1, Wu, Yue Ivan2, Wong, Kainam Thomas1 ktwong@ieee.org, Su, Da1
Source: Journal of the Acoustical Society of America. Apr2018, Vol. 143 Issue 4, p2041-2054. 14p.
Subjects: Detectors, Azimuth, Acoustic signal processing, Signal processing, Signal theory
Abstract: A “p-u probe” (also known as a “p-v probe”) comprises one pressure-sensor (which is isotropic) and one uni-axial particle-velocity sensor (which has a “figure-8” bi-directional spatial directivity). This p-u probe may be generalized, by allowing the figure-8 bi-directional sensor to have a higher order of directivity. This higher-order p-u probe has not previously been investigated anywhere in the open literature (to the best knowledge of the present authors). For such a sensing system, this paper is first (1) to develop closed-form eigen-based signal-processing algorithms for azimuth-elevation direction finding; (2) to analytically derive the associated Cramér-Rao lower bounds (CRB), which are expressed explicitly in terms of the two constituent sensors' spatial geometry and in terms of the figure-8 sensor's directivity order; (3) to verify (via Monte Carlo simulations) the proposed direction-of-arrival estimators' efficacy and closeness to the respective CRB. Here, the higher-order p-u probe's two constituent sensors may be spatially displaced. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: A higher-order “figure-8” sensor and an isotropic sensor—For azimuth-elevation bivariate direction finding.
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  Data: <searchLink fieldCode="AR" term="%22Muaz%2C+Muhammad%22">Muaz, Muhammad</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wu%2C+Yue+Ivan%22">Wu, Yue Ivan</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Wong%2C+Kainam+Thomas%22">Wong, Kainam Thomas</searchLink><relatesTo>1</relatesTo><i> ktwong@ieee.org</i><br /><searchLink fieldCode="AR" term="%22Su%2C+Da%22">Su, Da</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+Acoustical+Society+of+America%22">Journal of the Acoustical Society of America</searchLink>. Apr2018, Vol. 143 Issue 4, p2041-2054. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Detectors%22">Detectors</searchLink><br /><searchLink fieldCode="DE" term="%22Azimuth%22">Azimuth</searchLink><br /><searchLink fieldCode="DE" term="%22Acoustic+signal+processing%22">Acoustic signal processing</searchLink><br /><searchLink fieldCode="DE" term="%22Signal+processing%22">Signal processing</searchLink><br /><searchLink fieldCode="DE" term="%22Signal+theory%22">Signal theory</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: A “p-u probe” (also known as a “p-v probe”) comprises one pressure-sensor (which is isotropic) and one uni-axial particle-velocity sensor (which has a “figure-8” bi-directional spatial directivity). This p-u probe may be generalized, by allowing the figure-8 bi-directional sensor to have a higher order of directivity. This higher-order p-u probe has not previously been investigated anywhere in the open literature (to the best knowledge of the present authors). For such a sensing system, this paper is first (1) to develop closed-form eigen-based signal-processing algorithms for azimuth-elevation direction finding; (2) to analytically derive the associated Cramér-Rao lower bounds (CRB), which are expressed explicitly in terms of the two constituent sensors' spatial geometry and in terms of the figure-8 sensor's directivity order; (3) to verify (via Monte Carlo simulations) the proposed direction-of-arrival estimators' efficacy and closeness to the respective CRB. Here, the higher-order p-u probe's two constituent sensors may be spatially displaced. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1121/1.5027844
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      – Code: eng
        Text: English
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        PageCount: 14
        StartPage: 2041
    Subjects:
      – SubjectFull: Detectors
        Type: general
      – SubjectFull: Azimuth
        Type: general
      – SubjectFull: Acoustic signal processing
        Type: general
      – SubjectFull: Signal processing
        Type: general
      – SubjectFull: Signal theory
        Type: general
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      – TitleFull: A higher-order “figure-8” sensor and an isotropic sensor—For azimuth-elevation bivariate direction finding.
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            NameFull: Muaz, Muhammad
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            NameFull: Wu, Yue Ivan
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            NameFull: Wong, Kainam Thomas
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            NameFull: Su, Da
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            – D: 01
              M: 04
              Text: Apr2018
              Type: published
              Y: 2018
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            – TitleFull: Journal of the Acoustical Society of America
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