A Novel Self-Calibration Method for Acoustic Vector Sensor
Joint Authors
Source
Mathematical Problems in Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-03-11
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The acoustic vector sensor (AVS) can measure the acoustic pressure field’s spatial gradient, so it has directionality.
But its channels may have nonideal gain/phase responses, which will severely degrade its performance in finding source direction.
To solve this problem, in this study, a self-calibration algorithm based on all-phase FFT spectrum analysis is proposed.
This method is “self-calibrated” because prior knowledge of the training signal’s arrival angle is not required.
By measuring signals from different directions, the initial phase can be achieved by taking the all-phase FFT transform to each channel.
We use the amplitude of the main spectrum peak of every channel in different direction to formulate an equation; the amplitude gain estimates can be achieved by solving this equation.
In order to get better estimation accuracy, bearing difference of different training signals should be larger than a threshold, which is related to SNR.
Finally, the reference signal’s direction of arrival can be estimated.
This method is easy to implement and has advantage in accuracy and antinoise.
The efficacy of this proposed scheme is verified with simulation results.
American Psychological Association (APA)
Zhang, Yao& Fu, Jin& Li, Guannan. 2018. A Novel Self-Calibration Method for Acoustic Vector Sensor. Mathematical Problems in Engineering،Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1205524
Modern Language Association (MLA)
Zhang, Yao…[et al.]. A Novel Self-Calibration Method for Acoustic Vector Sensor. Mathematical Problems in Engineering No. 2018 (2018), pp.1-9.
https://search.emarefa.net/detail/BIM-1205524
American Medical Association (AMA)
Zhang, Yao& Fu, Jin& Li, Guannan. A Novel Self-Calibration Method for Acoustic Vector Sensor. Mathematical Problems in Engineering. 2018. Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1205524
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1205524