| Popis: |
The aim of this work is to perform a high‐resolution wave number inversion in a noisy shallow water waveguide. A single‐frequency source is towed at a constant speed relative to a vertical array. No a priori knowledge of the waveguide characteristics is required. The inversion algorithm starts from the holographic representation of the field received from the source on the array. Then, using the recorded field along the source track, a newly modified eigen‐matrix pencil was performed to extract the wave numbers. The accuracy of the method is compared to the Cramer–Rao lower bounds. The dependence of the results on the length of the source track, the number of receivers in the array, the signal‐to‐noise ratio, and the sound velocity profile in the waveguide are discussed. Both experimental and simulated data are reported. |
