Abstract:

Detection and localization of low spectral-level, broadband signals in the presence of surface interference are described and illustrated with examples obtained in the May 1996 Shallow Water evaluation cell Experiment (SWellEx-96). The experiment was carried out west of Point Loma in 200-m water of complex bathymetry. A 118-m vertical line array (VLA) was deployed next to an identical line array tilted at 45 deg (Tilted VLA). A 240-horizontal line array was also deployed nearby. The detection performance of each of the vertical arrays with adaptive broadband matched-field processing (MFP) is measured and compared with the performance of the horizontal array with adaptive broadband plane-wave beamforming.