Acoustic Near-Field Source-Localization by Two Passive Anchor-Nodes

A new scheme is herein proposed to localize an acoustic source. This new method blends the "received signal strength indication" (RSSI) approach of geolocation, and the acoustic vector-sensor (AVS) (a.k.a., vector-hydrophone) based direction-finding (DF). Unlike customary RSSI-based source...

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Bibliographic Details
Published in:IEEE transactions on aerospace and electronic systems 2012-01, Vol.48 (1), p.159-169
Main Authors: Wu, Y. I., Wong, K. T.
Format: Article
Language:English
Subjects:
Acoustic measurements
Acoustic sources
Acoustics
Aircraft components
Blends
Direction of arrival estimation
Educational institutions
Electronic systems
Emittance
Estimates
Estimation
Mathematical analysis
Sensors
Signal to noise ratio
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Summary:A new scheme is herein proposed to localize an acoustic source. This new method blends the "received signal strength indication" (RSSI) approach of geolocation, and the acoustic vector-sensor (AVS) (a.k.a., vector-hydrophone) based direction-finding (DF). Unlike customary RSSI-based source-localization, this proposed approach needs only two (not three or more) passive anchor-nodes: 1) one pressure-sensor, and 2) one physically compact triad of three (collocating, but orthogonally oriented) acoustic velocity-sensors. The latter can estimate the direction-of-arrival (DOA) of an emitter, regardless of that emitter's arbitrary/unknown center-frequency, bandwidth, spectrum, and near-field/far-field location. This triad's DOA estimates can be "distributed processed," locally, apart from the pressure-sensor's measured power, to estimate the emitter's radial distance. This proposed algorithm is noniterative, requires no initial estimate, is closed form, and can accommodate any prior known propagation-loss exponent.
ISSN:0018-9251
1557-9603
DOI:10.1109/TAES.2012.6129627