title: Striation-based beamforming for estimating the waveguide invariant with passive sonar.
abstract: 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.
authors: University of Washington, Seattle, WA 98105, USA. rouseff@apl.washington.edu
authors: Daniel
authors: D
authors: Rouseff
authors: Lisa M
authors: LM
authors: Zurk
mesh_terms: D003198:Computer Simulation; D008962:Models, Theoretical; D009038:Motion; D009716:Numerical Analysis, Computer-Assisted; D009792:Oceans and Seas; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D014465:Ultrasonics / Q000379:methods*; D014867:Water
chemical_list: D014867:Water