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Titolo:
APPLICATIONS OF OPTIMAL TIME-DOMAIN BEAMFORMING
Autore:
COLLINS MD; BERKSON JM; KUPERMAN WA; MAKRIS NC; PERKINS JS;
Indirizzi:
USN,RES LAB WASHINGTON DC 20375
Titolo Testata:
The Journal of the Acoustical Society of America
fascicolo: 4, volume: 93, anno: 1993,
parte:, 1
pagine: 1851 - 1865
SICI:
0001-4966(1993)93:4<1851:AOOTB>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Citazioni:
7
Recensione:
Indirizzi per estratti:
Citazione:
M.D. Collins et al., "APPLICATIONS OF OPTIMAL TIME-DOMAIN BEAMFORMING", The Journal of the Acoustical Society of America, 93(4), 1993, pp. 1851-1865

Abstract

Applications to ocean acoustic data from a towed array and to speech processing are presented for an improved optimal time-domain beamformer, which involves optimizing over all possible source bearings and time series for multiple sources using simulated annealing. The convergence of the parameter search is accelerated by accepting time series perturbations only when the energy decreases. A comparison with the conventional delay-and-sum beamformer illustrates that the optimal beamformer handles larger receiver spacing and larger source-to-receiver ratio. Periodic ambiguities are essentially eliminated by using irregular receiver spacing and the improved search algorithm. Weak sources are handled with fractional beamforming. Noise cancellation is possible if the parameters of the noise are included in the search space. Two-dimensional localization is performed for nearby sources.

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Documento generato il 25/09/20 alle ore 00:40:50