Detection of a Noise Signal in an Oceanic Waveguide Using a Vertical Array

Abstract—Interferometric processing of hydroacoustic information using a vertical linear array is described. A relationship is found between the spectral density of the two-dimensional Fourier transform of the interference pattern formed by a moving broadband noise source and the number of the array elements. The array gain and the noise immunity of the processing are estimated. Analysis is given to the region of the input signal-to-noise ratios for which the array adequately reconstructs the radial velocity of the noise source and its distance from the receiver. The method for solving the noise signal detection problem on the basis of the Neyman–Pearson criterion is described. Expressions are obtained for the correct detection and false alarm probabilities as a function of the signal-to-noise ratio and the number of the array elements. Noise signal detection curves are calculated. The signal detection efficiency of the array is estimated in comparison to a single receiver.