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Titolo:
Iterative time reversal in the ocean
Autore:
Song, HC; Kuperman, WA; Hodgkiss, WS; Akal, T; Ferla, C;
Indirizzi:
Univ2093if San Diego, Scripps Inst Oceanog, Marine Phys Lab, La Jolla, CA 9 Univ Calif San Diego La Jolla CA USA 92093 arine Phys Lab, La Jolla, CA 9 SACLANT Undersea Res Ctr, I-19138 La Spezia, Italy SACLANT Undersea Res Ctr La Spezia Italy I-19138 -19138 La Spezia, Italy
Titolo Testata:
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
fascicolo: 6, volume: 105, anno: 1999,
pagine: 3176 - 3184
SICI:
0001-4966(199906)105:6<3176:ITRITO>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHASE-CONJUGATION; MIRROR; ACOUSTICS; OPERATOR; MEDIA; MODE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Engineering, Computing & Technology
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Song, HC Univ2093if San Diego, Scripps Inst Oceanog, Marine Phys Lab, La Jolla, CA 9 Univ Calif San Diego La Jolla CA USA 92093 s Lab, La Jolla, CA 9
Citazione:
H.C. Song et al., "Iterative time reversal in the ocean", J ACOUST SO, 105(6), 1999, pp. 3176-3184

Abstract

The iterative time-reversal process focusing on the strongest scatterer ina multitarget medium has been described theoretically in terms of eigenvalues and eigenvectors of a time-reversal operator K*K in ultrasonics [Prada et. al. J. Acoust. Soc. Am. 97, 62-71 (1995)]. In this paper, we extend theconcept of iterative-time-reversal to waveguide propagation in the ocean. For a single target, the iterative time-reversal process results in a minorimprovement in spatial focusing. However, data from a recent experiment inthe Mediterranean Sea [Kuperman et al., J. Acoust. Soc. Am. 103, 25-40 (1998)] illustrates the importance of the waveguide and source transducer characteristics even in the single target case. When the ocean contains severalreflectors, iterative time-reversal focuses on the target corresponding tothe largest eigenvalue of the time-reversal operator, which depends not only on the reflectivity of the targets, but also on the complex propagation effects between the targets and time-reversal mirror. Analysis of the experimental data for a single target and simulation results with multiple targets in the ocean are presented. (C) 1999 Acoustical Society of America. [S0001-4966(99)02306-1].

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 04:46:37