Propagation and Scattering in a Variable Shallow Water Waveguide
WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
Pagination or Media Count:
The long-term goal is to develop models for mid-frequency 1-10 kHz acoustic propagation and scattering effects that can form the basis for model-based signal processing algorithms. Specifically, this includes deterministic propagation effects as encompassed in the so-called waveguide invariant and random scattering effects as represented by the scintillation index. The primary objective in FY11 was to develop a method of broadband stiration-based beamforming that would allow one to estimate the numerical value of the waveguide invariant. Secondary efforts in collaboration with other investigators involved blind channel estimation and characterizing the acoustic scinitillation observed in an existing data set.