engleski

Direct evaluation of a vessel passive detection

The paper treats the problem of the statistical direct evaluation of the vessel passive detection structure. The vessel passive detection structure is based on the statistical optimum passive detection of the vessel underwater acoustic noise as a signal in the presence of deep-sea ambient acoustic noise as interference. The vessel signal is supposed to be a zero mean Gaussian stochastic process composed as a sum of some statistical independent parts. These parts are due to cavitation phenomenon of the vessel propeller(s) and to vibration phenomena of the vessel operating machinery, mechanisms and propeller(s). The interference is supposed to be a zero mean Gaussian stochastic process as well. The statistical optimum detection of the signal is considered in the frequency domain and is realized by means of the likelihood ratio statistical test and the Neyman-Pearson criterion. To evaluate the vessel passive detection structure performance we have to consider the probability density functions of the signal, of the interference and of their sum. The direct evaluation measure is now the value of detection probability versus the value of the false alarm probability with signal-to-noise ratio as a parameter.

nije evidentirano

nije evidentirano