Multipath reverberation modeling for shallow water acoustics

Z. G. Lowe, Daniel Brown

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Sonar performance can be limited by a number of factors including hardware design, signal processing, and the environment. In environments where the sonar range is much greater than the water depth, multipath interference will frequently be the limiting noise source. To design, or adaptively vary, the vertical apodization of the transmitter and receiver, it is necessary to estimate both the level and angle of arrival of multipath interference. A simple model has been developed to predict the influence of individual multipath rays through second order multipath. The perturbation approximation is used to model the reverberation from both the sea surface and the sea floor. Sea-floor roughness is assumed to have a power law spectrum, with spectral strengths and exponents taken from experimental tests performed in a given environment. Surface roughness is based on a Pierson-Moskowitz spectrum. An example comparing a high frequency and low frequency imaging sonar system will be presented.

Original languageEnglish (US)
Title of host publication11th European Conference on Underwater Acoustics 2012, ECUA 2012
Pages1285-1291
Number of pages7
EditionPART 3
StatePublished - Dec 26 2012
Event11th European Conference on Underwater Acoustics 2012, ECUA 2012 - Edinburgh, United Kingdom
Duration: Jul 2 2012Jul 6 2012

Publication series

Name11th European Conference on Underwater Acoustics 2012, ECUA 2012
NumberPART 3
Volume34 2

Other

Other11th European Conference on Underwater Acoustics 2012, ECUA 2012
CountryUnited Kingdom
CityEdinburgh
Period7/2/127/6/12

Fingerprint

sonar
reverberation
shallow water
acoustics
interference
apodization
water depth
transmitters
arrivals
signal processing
rays
surface roughness
hardware
roughness
receivers
exponents
low frequencies
perturbation
estimates
approximation

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

Lowe, Z. G., & Brown, D. (2012). Multipath reverberation modeling for shallow water acoustics. In 11th European Conference on Underwater Acoustics 2012, ECUA 2012 (PART 3 ed., pp. 1285-1291). (11th European Conference on Underwater Acoustics 2012, ECUA 2012; Vol. 34 2, No. PART 3).
Lowe, Z. G. ; Brown, Daniel. / Multipath reverberation modeling for shallow water acoustics. 11th European Conference on Underwater Acoustics 2012, ECUA 2012. PART 3. ed. 2012. pp. 1285-1291 (11th European Conference on Underwater Acoustics 2012, ECUA 2012; PART 3).
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Lowe, ZG & Brown, D 2012, Multipath reverberation modeling for shallow water acoustics. in 11th European Conference on Underwater Acoustics 2012, ECUA 2012. PART 3 edn, 11th European Conference on Underwater Acoustics 2012, ECUA 2012, no. PART 3, vol. 34 2, pp. 1285-1291, 11th European Conference on Underwater Acoustics 2012, ECUA 2012, Edinburgh, United Kingdom, 7/2/12.

Multipath reverberation modeling for shallow water acoustics. / Lowe, Z. G.; Brown, Daniel.

11th European Conference on Underwater Acoustics 2012, ECUA 2012. PART 3. ed. 2012. p. 1285-1291 (11th European Conference on Underwater Acoustics 2012, ECUA 2012; Vol. 34 2, No. PART 3).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Lowe ZG, Brown D. Multipath reverberation modeling for shallow water acoustics. In 11th European Conference on Underwater Acoustics 2012, ECUA 2012. PART 3 ed. 2012. p. 1285-1291. (11th European Conference on Underwater Acoustics 2012, ECUA 2012; PART 3).