GAIN OF A VERTICAL ANTENNA-ARRAY IN A RANDOMLY INHOMOGENEOUS OCEANIC WAVE-GUIDE

The gain is calculated for a vertical array, which is assumed to recei ve a partly coherent signal in the presence of anisotropic noise with a discrete mode spectrum under actual hydrological conditions typical of the northwestern Pacific. The cross-correlation functions of the si gnal and noise fields on the array aperture are modeled numerically, a nd the results are used in a comparative performance analysis of vario us methods of linear and quadratic spatial signal processing, includin g optimal ones. It is shown that the array gain varies between broad l imits according to the coherence of the received signal, the mode comp osition of noise, and the processing algorithm used.