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Robust matched-field processing using a coherent broadband white noise constraint processor.

Claire Debever1, W A Kuperman

  • 1Marine Physical Laboratory, Scripps Institution of Oceanography, La Jolla, California 90093, USA. cdebever@ucsd.edu

The Journal of the Acoustical Society of America
|October 2, 2007
PubMed
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This study enhances broadband matched-field processing (MFP) using a white noise constraint to improve robustness against environmental mismatch and limited data. The method is validated with simulations and experimental data.

Area of Science:

  • Acoustics
  • Signal Processing
  • Oceanography

Background:

  • Adaptive matched-field processing (MFP) is sensitive to environmental mismatch and requires high signal-to-noise ratios.
  • Coherent-broadband MFP offers gains but increases sensitivity to mismatch and exacerbates snapshot deficiency.

Purpose of the Study:

  • To enhance the robustness of broadband matched-field processing (MFP) to environmental mismatch and snapshot deficiency.
  • To apply the white noise constraint method to a broadband processor.

Main Methods:

  • The white noise constraint method, typically for narrow-band processing, was adapted for broadband MFP.
  • The adapted broadband processor's theory was developed and validated using simulation and experimental data.

Main Results:

Related Experiment Videos

  • The white noise constraint significantly enhances robustness to environmental mismatch and snapshot deficiency in broadband MFP.
  • Dynamic range bias from snapshot-deficient processing aligns with previous single-frequency findings.

Conclusions:

  • The broadband white noise constraint method effectively improves the performance of MFP in challenging acoustic environments.
  • This approach offers a viable solution for robust broadband signal processing with limited data.