1 research outputs found
Imaging extended reflectors in a terminating waveguide
We consider the problem of imaging extended reflectors in terminating
waveguides. We form the image by back-propagating the array response matrix
projected on the waveguide's non-evanescent modes. The projection is adequately
defined for any array aperture size covering fully or partially the waveguide's
vertical cross-section. We perform a resolution analysis of the imaging method
and show that the resolution is determined by the central frequency while the
image's signal-to-noise ratio improves as the bandwidth increases. The
robustness of the imaging method is assessed with fully non-linear scattering
data in terminating waveguides with complex geometries.Comment: 35 pages, 23 figures, submitted to SIIM