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ISSN: 1820-0206
eISSN:
2683-5770
First published in
1950
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doi: 10.5937//str1903041P
Vol.
69, No.3 (2019), Pages: 41-48
Impressum
Contents
Position
Determination of Acoustic Source Using Higher-Order Spectral
Analysis for Time of Arrival Estimation
Ivan P. Pokrajac
Miodrag Vračar
Tamara Šević
Vasilija Joksimović
The localization of
various acoustic sources in a battlefield (such as weapon rounds,
mortars, rockets, mines, improvised explosive devices, vehicle-borne
improvised explosive devices and airborne vehicles) nowadays has a
significant history. In acoustic source localization systems of
multiple sensors, networked and placed at known positions are used
to detect signals emitted from the source and perform localization
of the source. Time of arrival estimation of the gun fire shock
waves at large distances is significant when the purpose is the gun
localization. At large distances shock wave signal is significantly
deformed and therefore it is relatively difficult to accurately
estimate the time of arrival. In this paper methods for TOA
estimation are proposed, which are based on cumulants of the
acoustic signal which originate from distant gunfire events.
Localization of acoustic sources is performed in two steps by time
difference estimation of acoustic signal arrival and using Discrete
Probability Density method for positioning. Numerous field
experiments have been conducted in order to verify performance of
the proposed approach.
Key words:
acoustic
source, cumulant, high order statistics, localization, time of
arrival.
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