Simultaneous localization of multiple broadband non-impulsive acoustic sources in an ocean waveguide using the array invariant
Name
Makris_Simultaneous localization.pdf
Size
3.75 MB
Format
Adobe PDF
Checksum (MD5)
4a5ca80bae07d561fb5e3185ee4403b0
Author(s)
Gong, Zheng
Ratilal, Purnima
Makris, Nicholas
Date Issued
November 2015
Journal
The Journal of the Acoustical Society of America
Publisher
Acoustical Society of America (ASA)
Citation
Gong, Zheng, Purnima Ratilal, and Nicholas C. Makris. “Simultaneous Localization of Multiple Broadband Non-Impulsive Acoustic Sources in an Ocean Waveguide Using the Array Invariant.” The Journal of the Acoustical Society of America 138, no. 5 (November 2015): 2649–2667.
Version
Final published version
Abstract
The array invariant method, previously derived for instantaneous range and bearing estimation of a single broadband impulsive source in a horizontally stratified ocean waveguide, can be generalized to simultaneously localize multiple uncorrelated broadband noise sources that are not necessarily impulsive in the time domain by introducing temporal pulse compression and an image processing technique similar to the Radon transform. This can be done by estimating the range and bearing of broadband non-impulsive sources from measured beam-time migration lines of modal arrivals along a horizontal array arising from differences in modal group velocity and modal polar angle for each propagating mode. The generalized array invariant approach is used to estimate the range of a vertical source array and vocalizing humpback whales over wide areas from measurements made by a towed horizontal receiver array during the Gulf of Maine 2006 Experiment. The localization results are shown to have roughly 12% root-mean-squared errors from Global Positioning System measured ground truth positions for controlled source transmissions and less than 10% discrepancy from those obtained independently via moving array triangulation for vocalizing humpbacks, respectively.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1121/1.4932547
