High Resolution Wideband Acoustic Beamforming and Underwater Target Localization using 64-Element Linear Hydrophone Array

摘要

Implementation of an acoustic wideband beam-former in the frequency domain using mathematical modelling based on a plane wave incident on a hydrophone array is presented. A 64-element linear uniform hydrophone array with delay and sum algorithm for beamforming is designed. The designed array operates in the frequency region from 300 Hz to 3000 Hz. The interelement spacing is designed as half the wavelength of the maximum frequency, to avoid grating lobes in the desired beam. Beam patterns with the main lobe steered at 100 for 500 Hz, 1000 Hz and 2000 Hz is simulated. Normalised energy vs angle graph indicates the peak at the steered angle. The spectrum of the original and received signal is also compared to validate the performance of the implemented algorithm.