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Studies on underwater acoustic vector sensor for passive estimation of direction of arrival of radiating acoustic signal

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Title Studies on underwater acoustic vector sensor for passive estimation of direction of arrival of radiating acoustic signal
 
Creator Kalgan, Arjun
Bahl, Rajendar
Kumar, Arun
 
Subject Inertial vector sensor
MVDR
TLS-ESPRIT
Cardioid processing
 
Description 213-219
A passive underwater surveillance system performs the function of detection
and localisation by utilising the acoustic emissions from the source, whilst
itself remaining concealed. The conventional technique employs an array of
hydrophones (measure the scalar pressure), wherein the size of the array is
dependent on the desired angular resolution and the wavelength of the signal to
be monitored. The “vector” sensors, on the other hand, measure the  scalar pressure as well as the orthogonal
components of particle velocity using a co-located sensor and offer decided
advantages over the traditional solution due to their smaller size and
frequency independent performance (over the frequency range specified for
constituent particle velocity sensors). This paper presents studies on a
prototype underwater acoustic vector sensor. The present approach employs a
tri-axial accelerometer as a co-located particle acceleration sensor, and along
with a hydrophone it provides four sets of measurements of an acoustic field.
The parameter (Direction of Arrival) estimation has been carried out using both
subspace based methods as well as beamforming technique for demonstration of
the acoustic vector sensor system in the lab environment and its performance
analysis.
 
Date 2016-07-04T08:50:19Z
2016-07-04T08:50:19Z
2015-02
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/34637
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.44(02) [February 2015]