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Acoustic Near-Field Source Localization by Two Passive Anchor Nodes - a Pressure-Sensor& a Triad of Collocated Velocity-Sensors
| What |
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|---|---|
| When |
Dec 14, 2010 from 11:00 AM to 12:00 PM |
| Where | Engr IV Maxwell Room 57-124 |
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Kainam Thomas Wong
Hong Kong Polytechnic University
Tuesday, December 14, 2010 at 11:00am
Engr IV Maxwell Room 57-124
Abstract
A new scheme is herein proposed to localize an acoustic source.
This new method blends [a] the "received signal strength indication"
(RSSI) approach of geolocation, and [b] the acoustic vector-sensor
(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:
(i) one PRESSURE-sensor, and (ii) one physically compact triad of three
(collocating, but orthogonally oriented) acoustic VELOCITY-sensors. The
latter can estimate the direction-of-arrival of an emitter, regardless
of that emitter's arbitrary / unknown center-frequency, bandwidth,
spectrum, and near-field/far-field location. This triad's
direction-of-arrival 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 non-iterative, requires no initial estimate, is closed-form, and can accommodate any prior known propagation-loss exponent.
Biography
Kainam Thomas WONG (ktwong@ieee.org) earned his B.S.E. (Chemical Engineering) from UCLA in 1985, and the Ph.D. in E.C.E. from Purdue University in 1996. He had worked at the General Motors Technical Center in 1990-1991, and Johns Hopkins University Applied Physics Laboratory in 1996-1998. Between 1998 and 2006, he had been a faculty member at Nanyang Technological University (Singapore), the Chinese University of Hong Kong, and the University of Waterloo (Canada). He was conferred the "Premier's Research Excellence Award" by the Canadian province of Ontario in 2003. Since 2006, he has been an associate professor with the Hong Kong Polytechnic University. He is currently an associate editor for the IEEE Transactions on Signal Processing, and the IEEE Transactions on Vehicular Technology.
