Abstract

This paper proposes a study of underwater noise in Siutghiol lake from Constanta. This study is useful for the signal to noise ratio maximization for better underwater targets detection. Studying the properties of the underwater noise we want to conclude about noise stationery, in large or even in the restraint sense. It is very useful to study the aspect of the stochastic parameters – mean value, standard deviation and correlation coefficients. The relative invariance of those parameters denotes a kind of noise stationary in wide sense. If the density probability function of the underwater noise is time invariant this one can be considered a restraint (strict) sense stationary one. The noise characterization is useful to optimize the underwater targets detection by SONAR systems, using classic matched filters or time-frequency matched filters.

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