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pro vyhledávání: '"J.A. Fawcett"'
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Publikováno v:
Applied Acoustics. 69:422-437
At low-to-mid frequencies (1–15 kHz), sound penetrates better into lossy saturated sediments such as sandy seabeds than at the higher frequencies typical of many sonar systems. At the lower frequencies the signature of a man-made object, such as an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::342341a177a5a1cfa351ef45e332121e
https://doi.org/10.1016/j.apacoust.2007.04.002
https://doi.org/10.1016/j.apacoust.2007.04.002
The localization accuracy of a horizontal array observing a narrowband target with partial coherence
Autor:
B.H. Maranda, J.A. Fawcett
Publikováno v:
IEEE Journal of Oceanic Engineering. 18:466-473
The Cramer-Rao lower bound is used to assess the potential localization accuracy of a horizontal array observing a narrowband moving target. The narrowband signal received by the array is assumed to have only partial temporal coherence, which is mode
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a035a231f9f40b76a7fad1a5db5d36cd
https://doi.org/10.1109/48.262296
https://doi.org/10.1109/48.262296
Autor:
B.H. Maranda, J.A. Fawcett
Publikováno v:
IEEE Transactions on Signal Processing. 40:460-464
A novel method of target motion analysis (TMA) is presented. In contrast to conventional TMA techniques, which use sequences of bearing and/or frequency estimates as their inputs, the new TMA method works directly with hydrophone data to estimate the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce449de311f9cf22c7aca862a01c1ebc
https://doi.org/10.1109/78.124960
https://doi.org/10.1109/78.124960
Autor:
J.A. Fawcett, B.H. Maranda
Publikováno v:
IEEE Journal of Oceanic Engineering. 16:189-194
A novel method of target motion analysis (TMA) is presented. In contrast to conventional TMA techniques, which use sequences of bearing and/or frequency estimates as their inputs, the method works directly with beam spectra to estimate the target tra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60977dae72c72fc9b8c0bf40244e311b
https://doi.org/10.1109/48.84135
https://doi.org/10.1109/48.84135
Autor:
B.H. Maranda, J.A. Fawcett
Publikováno v:
IEEE Transactions on Information Theory. 37:209-214
The optimal power law is analyzed using characteristic function techniques. For a signal occupying more than about lambda =0.5 of the integration time, the standard square-law energy detector is close to optimal (among the class of power-law detector
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7a987cecc404bf17e09571a7d79f4f6
https://doi.org/10.1109/18.61143
https://doi.org/10.1109/18.61143
Publikováno v:
OCEANS 2008.
The long detection ranges provided by low-frequency active sources present many advantages to localize and track underwater threats from safe distances. However, in littoral environments, echoes from naturally occurring features cause false alarms wh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::961fa2547900464dcdcc7fc088e1ac32
https://doi.org/10.1109/oceans.2008.5151909
https://doi.org/10.1109/oceans.2008.5151909
Autor:
J.A. Fawcett
Publikováno v:
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing.
The effects of source and receiver motion on sound propagation in an oceanic waveguide are investigated. An explicit expression is given for the discrete Fourier transform of a harmonic signal emitted by a moving source in terms of the source and rec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4931d561208d7e1c115584fd244e93dd
https://doi.org/10.1109/pacrim.1989.48425
https://doi.org/10.1109/pacrim.1989.48425