Bispectrum and cross-bispectrum feature extraction based on vector hydrophone

Abstract

A vector hydrophone co-locating and simultaneously measures pressure and particle, which obtains more entire information of acoustic field than pressure hydrophone, so that to render the more methods of signal processing. Bispectrum is a kind of high order spectrum analysis method, which impose a lot of information that two order statistics can't obtian. In this paper, the algorithms of bispectrum was researched based on vector hydrophone to obtain the feature of acoustic signals. Bispectrum of particle velocity and cross-bispectrum of pressure and particle velocity were analyzed. Different methods were used to compress the information measured of bispectrum and cross-bispectrum to get the signal feature quickly and effectively. The experiment was carried on based on theoretical research, and the bispectrum and cross-bispectrum were used to extract the features of radiation noise of two kinds of acoustic targets, and the pressure and vector features were obtiand. The researched results showed that Gaussia...