Simultaneous detection of the acoustic-field aberration and Doppler shift in forward scattering

摘要

When a submerged target is crossing the source-receiver line, the aberration in the received acoustic field and Doppler shift in the forward scattered field are simultaneously induced. Formulations for the two variations are developed upon an ideal forward scattering configuration. Both the field aberration and Doppler shift are expressed as functions with the same argument - target motion time. The field aberration and Doppler shift were extracted from the collected data by the simple Hilbert transform (HT) and a hybrid technique, respectively. Simultaneous detection outputs are beneficial to enhance the reliability of target detection by providing both the aberrations in the received acoustic-field and the Doppler shift in the forward scattered field.