Scintillation in a shallow water waveguide
Final rept. 1 Feb 2010-31 Dec 2012
WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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The waveguide invariant summarizes the pattern of constructive and destructive interference between acoustic modes propagating in the ocean waveguide. For many sonar signal-processing schemes, it is essential to know the correct numerical value for the waveguide invariant. While conventional beamforming can estimate the ratio between the waveguide invariant and the range to the source, it cannot unambiguously separate the two terms. In the present work, striation-based beamforming is developed. It is shown that the striation-based beamformer can be used to produce an estimate for the waveguide invariant that is independent of the range. Simulation results are presented.
- Operations Research
- Acoustic Detection and Detectors