Zobrazeno 1 - 10
of 33
pro vyhledávání: '"J.E. Piper"'
Publikováno v:
IEEE Journal of Oceanic Engineering. 34:485-494
This paper presents observations of a buried sphere detected with a low-frequency (5-35-kHz) synthetic aperture sonar (SAS). These detections were made with good signal-to-noise ratios (SNRs) at both above and below the critical grazing angle. The ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4dc38ae4235fe2469de57fd5bd06a3d
https://doi.org/10.1109/joe.2009.2030971
https://doi.org/10.1109/joe.2009.2030971
Publikováno v:
IEEE Journal of Oceanic Engineering. 27:495-504
This paper presents observations of buried target detections made using a 20-kHz synthetic aperture sonar. At grazing angles below the critical angle, surprisingly high signal-to-noise detections were made of cylindrical targets buried at depths of 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0755cd0cb517821a487d81f1ab80a861
https://doi.org/10.1109/joe.2002.1040933
https://doi.org/10.1109/joe.2002.1040933
Autor:
J.T. Christoff, J.E. Piper, D. E. McGehee, K.W. Commander, Michael D. Richardson, Darrell R. Jackson, D. V. Holliday, Nicholas P. Chotiros, Charles F. Greenlaw, Joseph L. Lopes, Dajun Tang, Kevin L. Williams, Eric I. Thorsos
Publikováno v:
IEEE Journal of Oceanic Engineering. 26:4-25
A high-frequency acoustic experiment was performed at a site 2 km from shore on the Florida Panhandle near Fort Walton Beach in water of 18-19 m depth. The goal of the experiment was, for high-frequency acoustic fields (mostly In the 10-300-kHz range
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e8498433c2d7a9dd15cb98971ae5d238
https://doi.org/10.1109/48.917916
https://doi.org/10.1109/48.917916
Autor:
J.E. Piper
Publikováno v:
Oceans 2003. Celebrating the Past ... Teaming Toward the Future (IEEE Cat. No.03CH37492).
Summary form only given. Results of Coastal Systems Station at-sea and test pool experiments with multipath signals using synthetic aperture arrays are presented. It was found that multipath signals are often as strong and sometimes stronger than dir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0771b0ca2d5ec88e302a8be2ebbcafe7
https://doi.org/10.1109/oceans.2003.178062
https://doi.org/10.1109/oceans.2003.178062
Autor:
J.E. Piper
Publikováno v:
Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis (Cat. No.98TH8380).
This paper exploits the capabilities of the maximum likelihood method to detect an unknown number of low-level signals in the neighborhood of a high-power signal.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f1e7547d62b6aaf4aa7e77d993c6bedc
https://doi.org/10.1109/tfsa.1998.721447
https://doi.org/10.1109/tfsa.1998.721447
Autor:
J.E. Piper
Publikováno v:
IEEE Signal Processing Letters. 1:203-204
The maximum likelihood method is designed to yield high resolution estimates in a multiple source environment. The article derive a simplified representation of the maximum likelihood function for the two source case. This case is instructive to unde
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79d719fc715a6a27dcdfc8240c805e81
https://doi.org/10.1109/97.338753
https://doi.org/10.1109/97.338753
Autor:
J.E. Piper
Publikováno v:
IEEE Transactions on Signal Processing. 42:412-413
The symmetry of a uniform linear array can be exploited to construct a simplified analytical representation for the maximum likelihood function. This results in a significant decrease in the computational load and allows the algorithm to be used with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4c62bcb6752309faca179bdc9ac9abb
https://doi.org/10.1109/78.275614
https://doi.org/10.1109/78.275614
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Akademický článek
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