A Method for Quickly Acquiring Maniflod of Measured Broadband Array

A rapid acquirement method of measured broadband array based on fast Fourier transform (FFT) is proposed to shorten the measurement time and simplify the signal processing during the acquirement period. Combining underwater receiving acoustic array, broadband array manifold is obtained from measured data, and beamforming is hence completed by using the array manifold. Comparison of measured data and simulation data verifies the feasibility and effectiveness of the method. Experimental results show that this method has the advantages of faster measurement and simpler calculation than the conventional method, and can be applied to beam optimization and manifold measurement of broadband acoustic array.