Improved space time prewhitener for linear frequency modulation reverberation using fractional Fourier transform.
J Acoust Soc Am
; 128(6): EL361-5, 2010 Dec.
Article
em En
| MEDLINE
| ID: mdl-21218858
ABSTRACT
This letter presents an improved space time prewhitening method for linear frequency modulation (LFM) reverberation. The proposed method transforms the reverberation to fractional Fourier domain to whiten using fractional Fourier transform. The linear varying frequency in LFM reverberation is focused on a stationary frequency, and the adjacent block signal is used as the reference signal of prewhitening. Finally, experiment results with real reverberation data verify that the proposed method improves the detection performance of active sonar in shallow sea significantly.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Radar
/
Som
/
Acústica
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Processamento de Sinais Assistido por Computador
/
Modelos Lineares
/
Análise de Fourier
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
J Acoust Soc Am
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
China