PMID: 12765377May 27, 2003Paper

Broadband matched-field processing: coherent and incoherent approaches

The Journal of the Acoustical Society of America
Cristiano Soares, Sérgio M Jesus

Abstract

Matched-field based methods always involve the comparison of the output of a physical model and the actual data. The method of comparison and the nature of the data varies according to the problem at hand, but the result becomes always largely conditioned by the accurateness of the physical model and the amount of data available. The usage of broadband methods has become a widely used approach to increase the amount of data and to stabilize the estimation process. Due to the difficulties to accurately predict the phase of the acoustic field the problem whether the information should be coherently or incoherently combined across frequency has been an open debate in the last years. This paper provides a data consistent model for the observed signal, formed by a deterministic channel structure multiplied by a perturbation random factor plus noise. The cross-frequency channel structure and the decorrelation of the perturbation random factor are shown to be the main causes of processor performance degradation. Different Bartlett processors, such as the incoherent processor [Baggeroer et al., J. Acoust. Soc. Am. 80, 571-587 (1988)], the coherent normalized processor [Z.-H. Michalopoulou, IEEE J. Ocean Eng. 21, 384-392 (1996)] and the...Continue Reading

References

Jun 1, 2000·The Journal of the Acoustical Society of America·G J OrrisJ S Perkins

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Citations

Oct 7, 2011·The Journal of the Acoustical Society of America·Caglar YardimWilliam S Hodgkiss
Dec 2, 2010·The Journal of the Acoustical Society of America·Daniel Mennitt, Marty Johnson
Nov 30, 2010·The Journal of the Acoustical Society of America·Ioannis BertsatosNicholas C Makris
Nov 30, 2010·The Journal of the Acoustical Society of America·P SantosS M Jesus
Jan 15, 2008·The Journal of the Acoustical Society of America·Yong Han GohChen-Fen Huang
Jul 19, 2013·The Journal of the Acoustical Society of America·Bien Aik TanWilliam S Hodgkiss
Feb 6, 2008·The Journal of the Acoustical Society of America·Cristiano SoaresEmanuel Coelho
Oct 9, 2012·The Journal of the Acoustical Society of America·Stan E Dosso, Michael J Wilmut
May 3, 2018·The Journal of the Acoustical Society of America·Yun Wang, Hua Peng
Sep 3, 2020·The Journal of the Acoustical Society of America·Yining LiuZhenglin Li
Jan 3, 2020·The Journal of the Acoustical Society of America·Zoi-Heleni MichalopoulouAli Abdi
Jan 31, 2021·The Journal of the Acoustical Society of America·R Chen, H Schmidt

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