METHOD OF DETECTING HYDROACOUSTIC SIGNALS BASED ON INFORMATION FEATURES Russian patent published in 2024 - IPC H04B1/06 G01S15/02 

FIELD: hydroacoustics.

SUBSTANCE: invention relates to hydroacoustics and specifically to methods of detecting hydroacoustic signals. Detection of hydroacoustic signals is carried out using a multichannel system, by means of which simultaneous spatial evaluation of the signal environment is carried out, determined by independent channels for receiving and processing signals coming from sensors distributed in space or formed by an antenna of stationary beam patterns (BP), wherein the number of independent channels corresponds to the number of sensors or the number of BPs formed by the antenna, wherein the signals processing through the receiving elements from the sensors or BP distributed in space to the input of the receivers/receivers of each channel is further simultaneously performed in each channel and includes time and level quantisation, performing fast Fourier transform (FFT) and dividing the spectrum into windows, for each of which a short-term energy spectrum, imbalance and statistical complexity are calculated, formation of averaged spectra and arrays of normalized spectral values from short-term energy spectra, which, after their ordering, are stored in the corresponding memory units of each of the channels and, depending on the specified accumulation parameters, are displayed on the screen in the form of a panoramic view, graph of discrete components and an information image of the target, wherein the statistical complexity index exceeding a predetermined threshold value indicates the appearance of a useful signal in the noise mixture.

EFFECT: high efficiency and reliability of detecting hydroacoustic signals with a low signal-to-noise ratio, as well as resistance to external noise based on spectral information characteristics (entropy and statistical complexity).

1 cl, 12 dwg